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Operator
Thank you for standing by, and welcome to the Synaptics Inc. Fourth Quarter Fiscal Year 2022 Financial Results Call. (Operator Instructions) I would now like to turn the conference over to Munjal Shah, Head of Investor Relations. Mr. Shah. Please go ahead.
Munjal Shah - IR Officer
Thank you. Good afternoon, and thank you for joining us today on Synaptics' Fourth Quarter Fiscal 2022 Conference Call. My name is Munjal Shah, and I'm Head of Investor Relations. With me on today's call are Michael Hurlston, our President and CEO; and Dean Butler, our CFO. This call is also being broadcast live over the web and can be accessed from the Investor Relations section of the company's website at synaptics.com.
In addition to a supplemental slide presentation, we have also posted a copy of these prepared remarks on our Investor Relations website. In addition to the company's GAAP results, management will also provide supplementary results on a non-GAAP basis, which excludes share-based compensation, acquisition-related costs and certain other noncash or recurring or nonrecurring items. Please refer to the press release issued after market close today for a detailed reconciliation of GAAP and non-GAAP results, which can be accessed from the Investor Relations section of the company's website at synaptics.com.
Additionally, we would like to remind you that during the course of this conference call, Synaptics will make forward-looking statements. Forward-looking statements give current expectations and projections relating to our financial condition, results of operations, plans, objectives, future performance and business, including our expectations regarding the potential impact on our business of the COVID-19 pandemic and the supply chain disruption and component shortages currently affecting the global semiconductor industry.
Although Synaptics believes our estimates and assumptions to be reasonable, they are subject to a number of risks and uncertainties beyond our control and may prove to be inaccurate. Synaptics cautions that actual results may differ materially from any future performance suggested in the company's forward-looking statement.
We refer you to the company's current and periodic reports filed with the SEC, including our most recent annual report on Form 10-K for important risk factors that could cause actual results to differ materially from these contained in any forward-looking statements. Synaptics expressly disclaims any obligation to update this forward-looking information.
I will now turn the call over to Michael.
Michael E. Hurlston - President, CEO & Director
Thanks, Munjal, and welcome, everyone, to today's call. We had a strong finish to an outstanding year, one in which our IoT business grew 80%, an increase from 46% to 63% of our product mix. As our diversification strategy continues to play out, we see opportunity ahead for our IoT business, particularly in the 4 growth areas we discussed in last quarter's call.
June quarter revenue was slightly above the midpoint of our guidance range with strength across our IoT products offsetting some weakness in our mobile business. Our results showcase that our diverse portfolio is providing more resiliency in an uncertain demand environment. We maintained our profitability with non-GAAP gross margins generally consistent with the prior quarter's record level. We also delivered record non-GAAP operating margin, and our non-GAAP EPS was at the high end of our guidance range.
It's been almost 3 years to the day since I joined Synaptics. In that time, our non-GAAP gross margins have improved from 39% to 61%, our non-GAAP operating margins from 5% to 39%. And perhaps most importantly, by shifting the company away from its high mobile concentration, we reduced our end market risk. In that 3-year period, our IoT business has grown from $78 million in Q4 2019 to $332 million in Q4 2022, a 62% compound annual growth rate with most every line of business contributing. As a reminder, our IoT portfolio not only serves a variety of end markets but also a wide range of customers.
Last quarter, we highlighted 4 specific growth drivers within our IoT portfolio. Together, these businesses grew more than 90% this year, an amazing growth rate and best-in-class among semiconductor companies. However, we are seeing moderation in some segments of these areas, and we'll discuss the puts and takes.
First, our automotive business continues to grow, and we are seeing some benefit as supply becomes more readily available. We continue to win new TDDI designs but are also experiencing strong ramps with our existing customers such as Ford and Toyota. We see 3 trends driving growth in our automotive business. One, shift to electric vehicles is accelerating. And with that, there is an increase in consumer expectation for a more digitized interior.
Second, screen size are becoming larger and third, a general move to TDDI technology, which plays to our advantage as we have higher market share. Given the growth rate in this business, competition is beginning to increase. As such, we have products in design that move us to better cost positions and drive the feature set up.
Next, our wireless connectivity business continues to show strength in both design wins and the product pipeline. Last month, our triple combo wireless device received the 2022 Best of Sensors Award for connectivity. The device offers Wi-Fi 6E, Bluetooth and Thread/Zigbee protocols on a single chip. Our Wi-Fi business continues to benefit from the transition from Wi-Fi 5 to Wi-Fi 6 and 6E, where we have considerable performance advantages, particularly in terms of power and rate versus range performance. Production of Wi-Fi 6 designs has started with several large OEMs, including Google.
Another area of strength for our wireless products has been ULE technology. Product ramps are underway at numerous security companies, including ADT. While we continue to feel good about our long-term wireless prospects, we expect to see some near-term moderation in the consumer-facing part of our business.
Third, our virtual reality business has shown tremendous growth over the last calendar year. We are seeing significant opportunity ahead as Chinese customers begin their product launches. We remain the unquestioned leader in this market and have a road map that positions us well as screens go to faster refresh rates, higher pixel densities, and finer display types such as micro-OLED.
However, more than any of our IoT businesses, this is a new end market, and growth is ultimately dependent upon the success of our OEM customers. Our largest customer is reporting a significant slowdown, and we will be dependent on these new customer launches to really drive this business forward in the near term.
Finally, our video interface business continues to see solid demand in its core stock docking station application as the attach rates to PCs is increasing. Our backlog remains high because of supply constraints, but we're starting to see some incremental improvement in our ability to service demand.
For the most part, these devices are purchased by enterprise customers where demand is more resilient compared to consumer end markets. We're seeing good traction with our next-generation products.
For example, our dual-chip solution was recently designed in by StarTech for their hybrid docking solutions combining our display port technology with our display link compression. In addition, we are enthusiastic about our unique wireless docking opportunity that we believe will ultimately be additive to the overall TAM. Besides docking stations, our video interface products are getting traction in other applications such as factory automation, smart monitors, VR headsets and video conferencing.
Finally, our Spyder chip for the protocol adapter and converter market is building market momentum with design wins and opportunities at leading OEM customers, including Lenovo, Belkin, Kingston and Cable Matters. In our process technology business, we are winning new designs for audio processors, including our first in TWS, several gaming headsets and video conferencing systems. One of our most exciting wins is with Google and their Pixel Buds Pro, enabling best-in-class active noise cancellation capabilities and extended battery life. We have also been successful in penetrating new markets for our video processors, most notably a video conferencing win at Cisco.
Finally, our UCC products are having great success with voice over IP customers, seeing volume increases, share gains and content expansion with one of the world's leading UCC providers. In general, we're using our processor technology to pull through other products. We have certainly had great success cross-selling wireless, but have also had success in carrying other products, such as touch and video interface.
Two last areas of note. Our cordless products have performed far better than we originally expected, and we're gaining market share. Finally, our single-chip Flexsense, a device that combines 4 typically discrete sensors, is receiving positive initial customer response, and we are encouraged by our building customer pipeline.
Let me move on to our PC product group. Market demand for PCs has softened further, and we anticipate a mid-teens market decline in calendar 2022. We expect to outperform the overall PC market, given our strength in enterprise and higher-end SKUs where demand trends are better compared to consumer notebooks.
Our new Vulcan ASIC with best-in-class security and premium user experience for larger-sized Clickpads is gaining market traction. HP's latest enterprise notebook products use this ASIC, and we expect all other OEMs to adopt the device in their new models. In addition, we're starting to see touchpads become larger and designs moving from Clickpad solutions to Haptic Forcepads. We expect to benefit from this industry transition as we have a strong market position and higher content, which we believe will result in 30% to 40% average selling price uplifts.
Mobile is now only about 13% of the company's revenue. The headwinds we discussed in our last conference call have not abated, resulting in weaker-than-forecast performance in the business and further expected erosion next quarter. For the September quarter, we expect our mobile business to be down approximately 40% on a year-over-year basis.
After thinking we were at the bottom, business has continued to deteriorate at our large North American handset customer, primarily driven by sell-through of their low-end model. However, we remain confident in our market position in the areas in which we focus the pace of new handset model launches with our touch technology has remained consistent, highlighting our market strength. We see some positive signs in China as overall shipments have grown in the last 2 months and the mix of flexible OLED handsets continues to increase. In addition, we are seeing modest incremental revenue from our high-end flexible OLED display driver as supply improves. However, we're experiencing increased competitive pressure and now expect limited participation in this market.
To conclude, we had an exceptional fourth quarter and fiscal year with record financial performance. We introduced several new products, successfully integrated our acquisition, and grew organic and inorganic revenues. Our portfolio approach is presenting us with opportunities to cross-sell multiple products into customer platforms, an important growth vector for the company. While we're seeing some near-term market headwinds, primarily in mobile and PC, from weakening consumer confidence, we remain confident in our long-term potential, particularly in IoT. As a result, we see value in repurchasing our own shares. Dean will provide more details in his remarks.
Let me now turn the call over to him to review our results and provide our outlook.
Dean Warren Butler - Senior VP & CFO
Thanks, Michael, and good afternoon to everyone. I'll start with a review of our financial results for the recently completed fiscal year and recent quarter, then provide our current outlook.
For the full year fiscal 2022, net revenue of $1.74 billion was a new company record and up 30% compared to $1.34 billion in the prior year largely due to an 80% year-over-year growth in our IoT products, partially offset by our mobile products, which saw a 20% year-over-year decline. Gross margin for the company's products continued to expand with a new record for fiscal 2022 GAAP gross margin of 54.2% compared to 45.6% in the prior year. Our non-GAAP gross margin of 60% for the year was also a record and compares to 53.6% in the prior year as our mix shifted to IoT product applications, and we delivered higher-value products to customers.
GAAP net income for the recently completed fiscal year was $257.5 million or $6.33 per diluted share compared to the prior year of $79.6 million or $2.08 per diluted share, a year-over-year increase of 223%. Non-GAAP net income for the completed fiscal year was a record $551.2 million or $13.54 per diluted share compared to the prior year of $316.4 million or $8.26 per diluted share, delivering a 74% year-over-year improvement.
Revenue for the recently completed June quarter was $476.4 million, slightly above the midpoint of our guidance. Revenue was up 1% sequentially with the company's IoT product growth offsetting sequential declines in both mobile and PC. Revenue from IoT, PC and mobile, were 70%, 17% and 13%, respectively.
Year-over-year, June quarter revenue was up 45%, as our IoT products continue to deliver significant growth. Our June quarter IoT product revenue grew 87% year-over-year and was up 10% sequentially, reflecting strong customer demand during the quarter. Excluding the DSP Group acquisition, our organic IoT sales were up approximately 65% year-over-year.
As Michael mentioned, these results showcase the success we have achieved in our strategy to pivot Synaptics to a more diversified company focused on IoT applications. IoT is now 70% of our revenue and has grown at 50% compounding annual growth rate over the last 3 years to end the fiscal year at $1.1 billion in revenue, a significant achievement by almost any measure.
In PC, our June quarter revenue was down 10% sequentially and down 3% year-over-year. Our historically high mix in commercial notebooks gives us confidence in our ability to continue to lead in PC through both up and down markets. As we look ahead, we expect modest downward market pressure in PCs as our customers adjust to a more cautious end buyer, but we would expect our commercially weighted business to outperform the overall PC market.
Our June quarter mobile product revenue was down 20% sequentially and declined 4% year-over-year, lower than our prior expectations. Smartphone sell-through continues to be weak. We believe there's been a buildup of inventory across the smartphone channel, particularly in Chinese and Korean OEMs that will likely take some time to burn through. As such, we expect demand for our mobile products to remain soft into the September quarter with limited visibility on when this trend might reverse.
During the quarter, we had 2 customers greater than 10% of revenue at approximately 15% and 10%, both being distributors servicing multiple OEMs. A wide variety of our products ship through these distributors and, as such, don't represent any specific one OEM or end market.
For the June quarter, our GAAP gross margin was a new company record at 55.9%, which includes $22.8 million of intangible asset amortization, $900,000 of inventory fair value adjustment and $1 million of share-based compensation costs. June quarter non-GAAP gross margin of 61% was at the midpoint of our guidance range, which maintains our momentum with a strong product mix.
GAAP operating expenses in the June quarter were $142 million, which includes share-based compensation of $25.7 million, acquisition-related costs of $9.1 million consisting of intangibles amortization, and amortization of prepaid development costs of $2.5 million and restructuring-related costs of $500,000.
June quarter non-GAAP operating expenses of $104.2 million were down slightly from the preceding quarter and below our guidance primarily due to an unexpected foreign exchange benefit during the quarter. Our GAAP tax expense was $32.3 million for the quarter, and non-GAAP tax expense was $21.4 million.
In the June quarter, we had GAAP net income of $82.9 million or GAAP net income of $2.04 per share. Our record non-GAAP net income in the June quarter of $157 million was an increase of 3% from the prior quarter and an 81% increase from the same quarter a year ago. This significant increase in profit has rewarded our shareholders with a record-setting non-GAAP EPS per diluted share of $3.87, above the high end of our guidance range.
Now turning to the balance sheet. We ended the quarter with $876 million of cash, cash equivalents and short-term investments on hand, an increase of $121 million from the preceding quarter due to strong cash flow from operations of $128 million. Receivables at the end of June were $322 million and days of sales outstanding were 61 days, up from 57 days last quarter. Days of inventory were 82, above 71 days last quarter. And ending inventory balance was $170 million as inventory turns have slowed primarily in our mobile and PC areas. Capital expenditures for the quarter were $4.2 million, and depreciation was $6.1 million.
As Michael mentioned, we expect to return capital to shareholders through our previously announced stock buyback program, which at the end of the June quarter, has an available authorization of $577 million. We continue to pursue accretive inorganic opportunities. However, given the M&A landscape has become more challenged and we now have a comfortable cash balance, we intend to return cash flow to shareholders via share repurchases and to begin paying down outstanding debt. While some of our market areas are experiencing moderate softness, we believe share repurchase is a good use of our cash and a positive return potential.
Now let me turn to our September quarter outlook. We anticipate revenue for the September quarter to be in the range of $440 million to $470 million. We expect our revenue mix from IoT, PC and mobile products in the September quarter to be approximately 74%, 16%, and 10%, respectively. At the midpoint, we expect our IoT products to continue to grow approximately 60% year-over-year and up modestly on a sequential basis, partially offsetting anticipated further declines in mobile and PC.
Our backlog position remains strong and continues to be above the high end of our revenue guidance. However, we are seeing a change in some customer behavior, including some recent requests for pushouts and cancellations. To add additional color, we are seeing this change in products tied closest to consumer applications, specifically mobile phones, virtual reality, and a subset of wireless applications.
We expect to maintain our strength in gross margins with GAAP gross margin for the September quarter expected to be in the range of 55% to 56%. We expect non-GAAP gross margin in the range of 60.5% to 61.5%, which at the midpoint of 61% would be approximately 300 basis points higher than the same quarter 1 year ago. We expect GAAP operating expenses in the September quarter to be in the range of $152 million to $159 million, which includes intangibles amortization, prepaid development cost amortization and share-based compensation.
We expect non-GAAP operating expenses in the September quarter to be slightly below our June results and be a range of $102 million to $105 million. At this point, we have not changed our investment plans and continue to hire and add to our engineering and go-to-market capabilities to drive long-term product road maps. This sequential decline in operating expenses reflects a resetting of the company's annual bonus program as we begin our new fiscal year.
GAAP net income per share for our September quarter is expected to be in the range of $1.35 to $1.65. And non-GAAP net income per diluted share is anticipated to be in the range of $3.20 to $3.50 per share on an estimated 41 million fully diluted shares. We expect non-GAAP net interest expense to be approximately $8.5 million in the September quarter. Finally, beginning with fiscal Q1, we expect our fiscal 2023 long-term non-GAAP tax rate to be in the range of 16% to 18%, reflecting the tax law changes we discussed last quarter.
This wraps up our prepared remarks. I'd like to now turn the call over to the operator to begin the Q&A session. Operator?
Operator
(Operator Instructions). Raji Gill with Needham.
Gary Mobley with Wells Fargo Securities.
Gary Wade Mobley - Senior Analyst
As you know, I'm new to the call. So I apologize in advance if I violate any official or unofficial protocols here, but we appreciate the fact that the fiscal year is off to a bit of a soft start. It's a common theme throughout the earnings season. But how are you guys thinking about the balance of the year? What are you planning for? Do you have much visibility into the balance of the year? Maybe if you can just give us any color there would be much appreciated.
Michael E. Hurlston - President, CEO & Director
Gary, no violation so far, so good, fair question. We don't have a whole lot of visibility. I continue to worry, I think, as does Dean about our mobile business, we've seen pretty significant declines over the last couple quarters in that business, primarily related to China. IoT business has generally held up well. But as we said in the prepared remarks, we're seeing some pockets of softness, some pockets of strength. On balance, it's holding up relatively well. So I think it's going to probably be another quarter before we really get to a point where we have visibility, I would say, and we just got to work through this period in the PC and mobile sectors where there's some uncertainty.
Gary Wade Mobley - Senior Analyst
Okay. I don't think you filed your K yet. But if I go back to your most recent filing, I believe your purchase obligations were about $280 million, which I believe is an elevated level for you guys. And so my question is, did they pick up more as we concluded the fiscal year? Are they higher than you need them to be? Do you have more capacity in some areas than you need from your foundry partners? And is there any ability to negotiate the timing or quantity with your fab partners?
Dean Warren Butler - Senior VP & CFO
Gary, this is Dean. Just maybe just a quick one on some of the quantification. So you're right. We haven't filed the K yet. That will come out in a couple of weeks, consistent with when we're filing the annual. There hasn't been significant movements in purchase obligations. As you know, we do have a few obligations with a subset of suppliers, but the vast majority don't have sort of a written liability on obligation. Michael, do you want to talk about capacity?
Michael E. Hurlston - President, CEO & Director
Yes. I mean, I would say 2 other things, Gary, right, on the purchase obligations. Obviously, on the back end of those, we think we've got customer obligations that sort of tied to those. So we feel good about having a balance between our purchase obligations and where we've been able to pass that on to customers in terms of long-term agreements and things of that nature. We're definitely seeing easing in supply. As we said in the prepared remarks, there are still pockets where we're chasing supply. Our operations team is working overdrive on some of our nodes, 55-nanometer being one where it's still really, really compressed. But in other areas, we're seeing some easing that's allowing us to meet demand where we can. So a little bit of a mixed bag there as well, Gary.
Operator
Raji Gill with Needham.
Rajvindra S. Gill - Senior Analyst
Just wanted to dig a little bit deeper into some of the comments you talked about with respect to changes in customer behavior. You mentioned some pockets of weakness, obviously, in mobile phones. That's been well documented. That's now 10% of your business. But you talked a little bit about softness and some subset of wireless applications and virtual reality headsets. You mentioned, overall, these products are tied closer to the consumer. So if mobile is about 10% of the business, if you kind of put that to a side, what percentage of the revenue in total would you feel is tied to the "consumer applications?"
Dean Warren Butler - Senior VP & CFO
Yes. Raji, I mean it's actually tough to tell because many of our IoT products, as you might imagine, are long tail in nature. It's a minority portion and each sort of technology area has a different mix of consumer vs. enterprise sort of applications. So I don't have a specific sort of quantification. Like we said in the prepared remarks, our observation has been as the products get closer to the consumer. It does seem like we're seeing more volatility from the customers. Two of those examples, first being VR, right, is sort of having a very consumer-centric customer base. Second is mobile phones, which you mentioned has been pretty well documented. And then within wireless applications, obviously, a subset, and that is sort of a long tail of applications.
Michael E. Hurlston - President, CEO & Director
Yes, Raji, let me give a little bit of sort of color on VR. I think we have one customer that's relatively well documented they've seen some softness in their sell-through of products in North America. The offsetting event for us is we've got a couple of ramps that we expect in the back half of the year that give us confidence that we can kind of hang on there, even though that particular part of our business is obviously very consumer-facing. In wireless, as Dean said, I think it's more of a mixed bag, where we've got a range of end applications, some of which are industrial, some of which are enterprise, some of which are consumer, and it's probably hard for us to sort of break that down into different numbers to give you a read.
Rajvindra S. Gill - Senior Analyst
Got it. So the gross margins are holding up nicely at around 61%. The IoT business is now 70% of revenue. It's going to 74% of revenue. It's by far the highest gross margin segment of your company. So if there is a slowdown within IoT, maybe on some of the consumer-facing products, how are you kind of able to kind of maintain the gross margins? Or should we be expecting kind of some volatility or variability in those margins over time.
Michael E. Hurlston - President, CEO & Director
Yes. I mean, I think near term, it goes back to your first question, it's sort of the overall mix. And within IoT, we've got a reasonable part of the business that's enterprise or, in some areas, industrial, and we expect the gross margins there to hold up. And as that part of our business becomes a larger part of the mix, you would expect some gross margin expansion. But in the consumer areas, to your point, in that area of mix, we're seeing some price competition. We would expect some gross margin erosion potentially. So depending on how those 2 play out as parts of our mix, I think you get an answer right now that says, on balance, we see it holding up plus or minus through the balance of the fiscal year.
Dean Warren Butler - Senior VP & CFO
And I would just add one more item, Raji, and we've talked about in the past on prior calls, we do have input prices that continue to change. Mix is certainly in our favor. IoT sort of continues to grow. That probably doesn't change, but that's a bit offset by changing input prices. We obviously forecast and guide one quarter at a time, and we continue to you do extremely well in the gross margin department. And we would expect to continue to do that for the next quarter, as you can see in September here.
Rajvindra S. Gill - Senior Analyst
And if I could just squeeze in one more question, and I'll hop back in the queue. The internal inventory grew over 100% year-over-year on an absolute dollar basis. So revenue is growing -- revenue grew maybe 45%. So inventory growth is double that of revenue growth. Just wondering how you're thinking about inventory. How are you thinking about the channel inventory, particularly in IoT? And kind of currently, where are your kind of lead times for those IoT products?
Dean Warren Butler - Senior VP & CFO
Yes, it's a good question. That's not exactly a fair way to characterize on the gross inventory level given the revenue has been changing substantially. I would argue that, a year ago, we're probably significantly underinventoried, and so we're just sort of catching up. What I would say is the inventory increase is largely coming out of 2 primary areas where the inventory turns, so the sort of days of inventory has slowed around PC and mobile products. So what we would look to do is probably dial back some of our inventory position in those 2 areas. And in areas that we continue to be strong, we would continue to look to carry decent inventory, specifically in some of our IoT products. On top of this, what also ends up clouding a little bit of picture as lead times sort of come in and start to get compressed, the inventory and, therefore, backlog does move as lead times start to change, and those have started to come in as supply has loosened a little bit in some of these areas.
Operator
Your next question comes from the line of Chris Rolland with Susquehanna.
Christopher Adam Jackson Rolland - Senior Analyst
Some guys are coming out, and they have decent Septembers in terms of the guide, but then a pretty big fall for December. And I think that's because perhaps their customers are building inventory into the September quarter. I guess, do you have any visibility into that? And as we look past September, what are we kind of thinking a trough or -- sorry, not a trough, but a steady-state mobile quarterly rate might be like when things get back to normal? And would you classify PC here as normal as well? Those 2 segments are, in particular, what I'm trying to figure out from a steady-state, longer-term perspective.
Michael E. Hurlston - President, CEO & Director
Yes, Chris, again, fair questions. And I think we're all trying to get to the bottom of where this is. I think in Chinese mobile handsets, where the majority of our exposure is, it's still very hard for us to stay. As I indicated in the prepared remarks, we're seeing some signs of life in that market where sell-through has ticked up. We've seen sort of month-over-month increases. However, like you, I'm concerned about inventory levels and how long that's ultimately going to take to burn off, such that we see an uptick there. We do have a slightly positive offsetting event, and that is there are more handsets coming online. The mix is shifting more and more toward this flexible OLED display type, which, as you know, is one where we have strength.
In the PC area, again, I think we've got -- it's hard for us to sort of understand where this thing bottoms out. As you do, we're hearing of inventory in the channel. I think our sort of positive offsetting event there is we're more commercially facing. And we haven't necessarily seen the big puts and pulls that some of our competitors have that have a more consumer-facing mix. So again, very hard for us to sort of guide beyond the quarter we just gave. Some positive signs. Some positive signs in terms of inventory bleed. But on balance, it's tough to call. I don't know, Dean, if you have any more than that.
Dean Warren Butler - Senior VP & CFO
Yes, that's right. I mean, I would just echo Michael's comments, and a lot of these customers, I think, are reacting from the macro. And I think until customers start to get comfortable on where the overall economy is headed, I think there's probably going to be a little bit of choppiness kind of across the board.
Christopher Adam Jackson Rolland - Senior Analyst
And then my next one's around OpEx. So seemed like it was pretty good in the quarter, better than we had expected. What does that portend for the rest of the year in investment here? And then perhaps related or unrelated, the broadcom connectivity IP business, that potentially, I believe, might be up for sale again in 2023. Are there any updates on your thinking there? And would you potentially be a purchaser of that? Or is this all internal OpEx and R&D development that you guys are focused on?
Dean Warren Butler - Senior VP & CFO
Yes, Chris, let me just first take the OpEx one. I'll let Michael comment around broadcom Wi-Fi. OpEx -- we're actually still on track on OpEx. Nothing has sort of really changed. We continue to invest in the business. What you saw in the June quarter, and I spoke to it a little bit in my prepared remarks, is we had an unexpected FX benefit to OpEx in the quarter, excluding sort of what the FX impact is, we would have been pretty in line with what we had previously guided. So that was sort of an unexpected FX. Guiding into September, really what you see on the OpEx in that guide range is a resetting of the new fiscal year for the company, resetting of all the bonus plans and accruals sort of around that. So that you sort of typically see every year. And we would continue to hire and sort of grow kind of per our plans, I would say, on the OpEx side, probably nothing's really changed from the thesis. Michael, do you want to talk about Wi-Fi.
Michael E. Hurlston - President, CEO & Director
Yes, Chris, I mean, here's the way the contract reads. Obviously, at the end of the 3-year exclusion zone, they could resell the business, again, a third time, if you will. It's hard for me at this point to understand what they would sell. There -- at least as we understand it now, there are no people that are working on IoT-class products at broadcom, whereas when we got the business there were. There's no business that is attached to the IoT segment anymore, whereas when we got the business there was. So it's not to say they can't. There won't be a lot of the dynamics that we got when we ended up taking on this business. I don't know as a buyer what I would buy now in this particular circumstance seeing that there's no business and no people attached to it. It's not to say we might do something creative to keep somebody else out of it if it was indeed up for sale, but it's hard for me to understand what a buyer would be getting this time around.
Christopher Adam Jackson Rolland - Senior Analyst
And just a clarification from Dean. Dean, what do you think a run rate for the -- in terms of OpEx for the remainder of the year would be for next year? Just trying to understand December through June.
Dean Warren Butler - Senior VP & CFO
Yes. I would just look at sort of September guide and just sort of modestly sort of step up quarterly.
Operator
Krish Sankar with Cowen.
Unidentified Analyst
This is [Eddie] for Krish. I have a question on your virtual reality exposure. It seems you have a strong pipeline in that segment. So once those programs ramp, which I'm assuming should happen in back half of next year, how big can virtual reality become as a percentage of IoT.
Michael E. Hurlston - President, CEO & Director
Dean, maybe you can give 2 seconds on what we said when we first broke out the business, and maybe I'll talk a little bit to the second half of the question, which is how big we see it. I mean, I think that this one, as Munjal put in the prepared remarks, is really dependent on how well that market does. We have a big position in the market. There's one sort of giant customer right now, but we're actually really optimistic that we're going to see 2 or 3 equally sized customers come online here relatively quickly. And depending on how sell-through goes, we think we're going to do really, really well in that market. But it's totally dependent on -- in this one in terms of how you call the TAM, how you call -- how well our end customers will end up selling these products. So we think we have a differentiated product line. It's one that we're focused on. We continue to develop products for. We're optimistic that we can continue to lead in the market, but the guess is to the size of the market ultimately really, we're dependent on market reports and guesses as much as probably you are.
I don't know, Dean, do you want to add some color on the sizing when we initially broke it out.
Dean Warren Butler - Senior VP & CFO
Yes. Yes, just to give a little bit of quantification, Eddie, since this is all public, we broke it out. A couple quarters back, when we first started talking about VR, we had reported -- at that point in time, it was about a $50 million a year run rate revenue business for us. It had sort of since grown, and it had been growing quite rapidly for actually a couple years. And so it's obviously much larger now. It's really dependent on where does this market go, as Michael said. I think if the market reaches its potential that many people expect, it really could be a pretty sizable business for us in the future.
Operator
Kevin Cassidy with Rosenblatt.
Kevin Edward Cassidy - Senior Semiconductor Research Analyst
Congratulations on these tough times for pulling out these numbers and keeping gross margins up. As you're looking at the mobile business, though, with that going down to 10% of revenue, and you still -- you're not sure with the Chinese OEMs, where -- whether there's going to be an uptick or not, would you ever consider exiting that market?
Michael E. Hurlston - President, CEO & Director
It's a great question, Kevin. I mean, I think the problem for us is there's a lot of tie between what we do in mobile and technology then we then redeploy to automotive or to VR. It is an overall accretive business for us. It's throwing off cash. It's obviously -- we've been really disappointed in how it's grown from a top line perspective certainly over the last couple years. And so we continue to evaluate it, quite honestly, and look at what our options might be, but it's really that complication, and in some respects, it's a positive one where we get a lot of engineering leverage from mobile that we can redeploy into several other areas that are important to us -- and that complicates that discussion a bit more than might be apparent.
Dean Warren Butler - Senior VP & CFO
Yes. I would just add one other thing is, since Michael and I joined, we obviously have taken sort of a different strategic lens to mobile, which is managed to where our value proposition is, and that's what we've been focused on. A lot of the focus has been on IoT as you've seen over the last couple years. And we sort of continue to manage that way, I think, where we have differentiation and value to be had in mobile, we'll continue to prosecute that business, but it does have synergies that Michael talked about in some of our other areas that are strategically important.
Kevin Edward Cassidy - Senior Semiconductor Research Analyst
Okay. Yes, I can see that how -- especially for automotive. And maybe if you could talk about the barriers to competitive -- competitors that you have in the automotive market.
Michael E. Hurlston - President, CEO & Director
Yes, and the big one, Kevin, is this concept of TDDI. I mean, you really have to have state-of-the-art display drivers and state-of-the-art touch. We are seeing customers come in, and what we're trying to do to differentiate is we're trying to -- local dimming, which has to do with the contrast ratio you see. We're introducing products around that. As I said, we're introducing some lower-cost products. We're introducing products that enable larger feature sets, such as you can some of the some cars without going into names, put knobs on the screen itself, and we can enable that. So we've been able to keep ahead of competition, both from a cost standpoint and a feature standpoint.
And then we think we have a long-range advantage by bumping the contrast ratio, looking to deploy OLED in cars. There's a number of different things that we think that are happening as dynamics that'll keep our performance edge there. So that's a great market for us that just the very fact that you need both state-of-the-art touch and state-of-the-art display driver keeps competitors largely at Bay.
Operator
Vijay Rakesh with Mizuho.
Vijay Raghavan Rakesh - MD of Americas Research & Senior Semiconductor Analyst
Just a quick question on the IoT side. Obviously, you have a pretty good mix there between automotive and some of the DSP Group stuff and display link, et cetera. But if -- how would you break that up if you were to look at IoT between the consumer exposure or industrial or enterprise and automotive, if you can -- is there a way to kind of ballpark what the mix would be between the different segments?
Dean Warren Butler - Senior VP & CFO
Yes. So Vijay, we don't break out into these sort of sub-areas. I mean I think what we tried to do last call and again, this call is talk about sort of the 4 major growth areas within IoT, and that actually makes up the good majority of actually that revenue base so that we give everybody enough color on sort of what are the technologies driving that change? And just to reiterate from Michael's prepared remarks, that subset of the sort of 4 growth drivers, it accounts for a 90% year-on-year growth, so those businesses are doing tremendously well, and they account for the majority of IoT.
Vijay Raghavan Rakesh - MD of Americas Research & Senior Semiconductor Analyst
Got it. And I saw IoT is now getting to almost 74%, 75% ranges, which is your target, and you have a pretty good portfolio. But if you are looking -- are you -- would you still look for M&A? Or -- and what would be the -- where do you see opportunities to broaden out or improve that IoT platform?
Michael E. Hurlston - President, CEO & Director
Yes, Vijay, we definitely. I mean, I think that inorganic growth is a pretty big plank of the platform that Dean and I are putting forth. And I think that we've done relatively well with the acquisitions that we've taken in, we've maximized synergies and actually overdelivered in almost every case in terms of what we put forth as our operating plan. What I'd say right now, and Dean alluded to it when he started talking about the share buyback, I think it's a difficult environment right now for M&A. Our valuation is obviously, we think, is incredibly low. That's why, for the first time, Mr. Butler is signaling some appetite to do a share buyback. We think that if we had to put stock in a deal, it's incredibly cheap right now.
Meanwhile, we've had a pretty big correction in our stock price. Some of our competitors all had corrections probably not as much as ours. So the M&A environment right now, just from a financial perspective, is difficult. We continue to look to add breadth in the IoT area, Vijay. I think there are pieces like power and other things that you could see that, if we brought in and were able to cross-sell, it might make sense, but we have nothing really identified primarily because of this problem and valuation for the most part.
Operator
Ambrish Srivastava with BMO.
Ambrish Srivastava - MD of Semiconductor Research & Senior Research Analyst
I had a question on distribution and visibility into that channel, Mike and Dean. First, what is the percent of sales given that distribution, the top 2 customers also distribution? And then -- so just please remind us what's distribution sales. And then can you just help us understand your visibility into that channel and some sense of what channel inventory is?
Dean Warren Butler - Senior VP & CFO
Yes. First, on distribution sizing, sort of traditional distribution is relatively small. Many of our customers are sort of OEM customers. So distributors, if you think about it in sort of a traditional sense are probably in the 30% range. There are some distributors that we use that are sort of logistics providers between sort of us and the OEM that aren't really doing sort of demand creation. So that's another component. The distribution inventory position is probably up a little bit. I think we've seen customers wanting to carry a little more inventory, and some of them actually do that through their distribution partners. That is probably an area that customers utilize, when the macro starts to change, they either sort of push to the distributors or pull out of distributors depending on sort of their viewpoint of what's happening in the macro.
Michael E. Hurlston - President, CEO & Director
Ambrish, maybe add a little bit more color on top of Dean. I mean, unfortunately, it's kind of like our business as a whole. I'd say it's a bit of a mixed bag. In some areas, the disti inventory, as Dean said, is probably higher than normal. And distis are definitely trying to cut back on how much inventory they have. They don't want to have as much carrying cost at the moment. So they're obviously trying to derisk a little bit. So even against normalized levels, there's some pressure to cut that. .
But then in other parts of the business, as we've been saying, it's actually very light, and we're basically almost on a JIT type of shipment basis in areas like automotive, docking station, parts of our wireless business, we're shipping, and there's very little. It's almost pass-through from the distributors. So -- it's a bit of a mixed bag. I wish we could give you a little bit more clarity, but it really does depend for us kind of segment by segment.
Operator
Martin Yang with Oppenheimer.
Zhihua Yang - Associate
My question is a follow-up on the IoT segment. You highlighted 4 key growth drivers. Are those 4 areas also representative of the top-4 revenue in dollar contribution? If not, can you maybe rank some of the highest contributors by product segment to the IoT.
Dean Warren Butler - Senior VP & CFO
Yes. They certainly are the top 4 within IoT. I mean, the only exception, I would say, is sort of processors as a sort of a general bucket is probably bigger than VR. That would be the only swap, I would say, Martin.
Zhihua Yang - Associate
Got it. So you're referring to the media SoC part?
Michael E. Hurlston - President, CEO & Director
Yes. There's -- I mean, there's a bunch of things. If you -- on the prepared remarks, Martin, that are in there. We have audio processors. We do have the edge, the video processors are in there. We have our UCC processors that are voice over IP. Those are kind of collectively, as Dean said, if you sum up those 3 product areas, that collection is probably larger than VR today.
Operator
This concludes the time allotted for Q&A. I will now turn the call over to Synaptic management for final remarks.
Michael E. Hurlston - President, CEO & Director
I would like to thank all of you for joining us today. We certainly look forward to speaking to you at our upcoming investor conferences during the quarter. Thanks a lot.
Operator
This concludes the Synaptics Inc. Fourth Quarter Fiscal Year 2022 Financial Results Call. We thank you for your participation. You may now disconnect.