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The price of time-sharing and multiplexing

March 4, 2010

The familiar question, “How much did you have to put down on that time-share?” will soon be expanding from condominium real estate to advanced chip design. Tabula’s introduction of the provocatively named “Spacetime” earlier this week generated a lot of discussion on a characteristic seen in a few new FPGA architectures (3D interconnect) and one that is rather unique (time-slicing and multiplexing on-chip, between logic elements, to achieve greater density).

My colleague Ron Wilson provided perhaps the least starry-eyed analysis of any coverage this week, though the San Jose Mercury News should be credited for referring to Chris Edwards’ warning that there is no guarantee most designers will be willing to pay for these innovations.

Here’s where my skepticism comes in: I am happy to see at least four or five new startups in the FPGA realm, arising during a recession, though there is no indication they can crack the Xilinx-Altera duopoly any better than the startups of 2001-03. Some startups, such as SiliconBlue, NuPGA, and TierLogic, are betting on innovations that may be affordable for enough customers to gain the companies a critical mass in revenue stream.

Tabula’s innovations appear to be the most exciting of the bunch. Line multiplexing in and of itself can be a necessity for on-chip buses, channel aggregation in high-speed serial interfaces, and the like, but muxing in the time domain is the same kind of thing that got Inmos and other innovators into trouble on the “bridge too far” front. You certainly gain in logic density, to be sure, but at what cost in unit ASP and up-front design costs?

Craig Matsumoto generated a lot of discussion in his Light Reading analysis about the full associated costs of developing a Spacetime design, and whether those costs outweighed aiming for a generic ASIC. Fair question, and the Tabula founders gained little credibility when they said they were looking for a strict high-end customer base. I could say Jaguar, I could say Hummer, but the point is that in times of deep economic recession, there is little room for a startup which has burned through $100 million in venture cash and wants to focus strictly on the high end.

If the ultimate end game is to hope for a buyout bid from Xilinx or Altera, I have news for Tabula: I saw plenty of network equipment business plans in 1998-99 that ended with “Then we get bought by Cisco.” By 2001, Cisco didn’t have enough money to buy a three-person design house. If the Tabula business plan is hoping for a buyout in an economy like this one, the chances don’t look thrilling. And its methods for generating significant revenue stream from Spacetime don’t look like an adequate Plan B.

 

Posted by Loring Wirbel on March 4, 2010 | Comments (5)

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April 16, 2010
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March 6, 2010
In response to: The price of time-sharing and multiplexing
Richard J commented:

If you look at the history of FPGA, it became prevailing technology because they replaced glue logic, without expecting engineers to change design methodology. The same mindset continued with integration of hard-IPs, and so forth. That is the essence! Any new technology whether Achronix, or Tabula proposes change in existing mind set. Any new methodology, in a way, shrinks the servable market, and hurts the prospects of the company itself. FPGA business survives and grows on basic concept that same silicon can be sold to large customer base. The concept of niches goes against that concept. In my opinion, technologies like 3D-PLD will creates a niche for themselves, even become the leaders in that carved niche but I doubt they will become billion dollar businesses. What surprises me that VCs are pouring money, so there must be something that is either not articulated or I do not have full information. I would like to hear more on what is the value proposition.


March 4, 2010
In response to: The price of time-sharing and multiplexing
Andy T commented:

No - you didn't miss a thing with your veteran's eye, IMO. When you, as a CEO, ask an investor for money, and they become your partner (not a "John") in any venture, you can do one of two things - hype it and ride a fad, or do the math and build a legit biz plan that actually can stand on its own legs with achievable technology and execution. I actually did have a plan that delivered ROI and had been there, done that, as far as analyzing a Tabulesque business target(making my prior post a regurge), quickly dismissing its viability for my investors and then building a plan to actually make the numbers and a healthy risk/reward return. Momentum is a huge distraction I didn't have, so we really can't blame them for where they are now ad need to give them a gold star for sticking with it. At the same time, Tabula have inadvertently set the bar for VC's *perceived* cost of semiconductor startups, peeing in the VC bathtub we all share. It'll be tough to get any kind of fabless semi up and running anywhere, as a result of the perceived burn and time these guys, people with immense talent and experience, spent.


March 4, 2010
In response to: The price of time-sharing and multiplexing
Andy T commented:

Agreed in spades. Tabula have been around for 7 years (!!) and we're just now seeing an announcement, primarily because they were ahead of themselves in terms of where silicon capability was, IMO. I did the math on an eerily similar concept this past December, trying to get my own startup company off the ground by presenting it credibly to the VC community. If Tabula are truly to stand on their own two feet, even a 4:1 return on investment (dismal ratio by VC standards) means they need to get to LATTICE size, the number three/four player in the market, by the time they hit production. And if they are to truly collapse pricing in the high end market, let's just assume the high end FPGAs are half the revenues in a $3B market, that Tabula drops prices by 33%, and that 30% of revenues are from new designs. This means a capture of 133% of all high end opportunities...IMPOSSIBLE. And that's the challenge. Even getting 40% of the market share (extremely optimistic) is breakeven on SALES. There are those (Dave's comment in Ron's entry) have suggested the FPGA market will explode in terms of growing beyond its $4B organic base - OK, then double it and the math still turns out crappy. Remember, the payback is with net margin, not sales, so then you have to stretch teh payback period to 5 years, a time in which X and A will react and deliver production parts for three years. The smoke and mirrors of hype have to be glitzy enough to keep acquirers and VCs from doing the math - some very ugly math. The only reason to buy them out is to sustain margins in the high end for A and X and whether it's cheaper to do that, then, say, just pop the speed up on a Cyclone or Spartan. That is the only reason in my book for them to get bought - it's certainly not going to be accretive according to my math. Maybe I'm wrong, but the ROI just cannot just magically appear. It has to be a smoke and mirror, hype play - and, as you've oted Loring, in a recession, where exhuberance is nonexistent, let alone irrational.

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