New GA144 Info

It's interesting that they characterize at 125C. They probably intend automotive use, which is great for a low power chip. How many processors are in a car these days? There could be a dozen just under the hood.

The increased power consumption at high temperature is typical of CMOS chips. It's not specific to Greenarrays. I can think of some obvious factors, such as:

- Increased on resistance of the transistors

- More overlap in a gate's linear region, where both P and N transistors conduct because the input voltage is halfway between hi and lo. Slower edge rates (due to higher on resistances) would exacerbate the problem.

Certainly, modern very small feature size CMOS circuits' power dissipation increases with temperature, because a major part of that power dissipation is now due to leakage, which is governed by Arrhenius' Equation.

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I don't think you read my post carefully and you don't seem to have looked at any of the data on the GreenArrays chips. They are extremely low power devices and do not use "modern" (meaning smallest possible) feature sizes. They are using a process somewhere around

Rick

Have you told the folks at Green Arrays these "not familiar withs" and "can't imagines" and asked THEM your questions? They don't monitor clf and won't answer here because they want to build a FAQ on their website where the answers will be easily searchable indefinitely.

Contact them at for real answers.

-John [disclosure: I'm a contractor who's worked on/with the chips.]

increase

dissipatio=

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As someone who started off with 5 micron feature size CMOS, 120 nm IS "very small feature size".

YMMV.

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Actually I cross posted this to c.a.e and expected someone to know enough about semi-conductor physics to know the answer. I don't think the GA144 is so unique that the basics are different. I see that not everyone there cross posted back to c.l.f

Rick