[Libre-silicon-devel] Analog Try-out "triple-5"
hsank at posteo.de
Sun Mar 3 20:13:09 CET 2019
Today in our weekly Mumble Session we talked about a smaller chip, which
could be realized before the Northpoint.
The Reason is mostly, that the Northpoint (as an small MCU) - beside the
Standard Cells - also has some challenging Analog Stuff (like the ADC,
Pad-Cells) which set the hurdle a little bit high.
We need some physical haptic fancy / shiny silicon before which gives us
also a realistic way to verify our simulation after model measurement we
do with PearlRiver. Something we could hand over to other people and
Well, we came across the well-known "triple-5 chip". The original NE555
 was developed by the Swiss electronics engineer Hans Camenzind 
and get cloned by nearly all silicon firms on the market in this era.
Great starting points for our CMOS-based clone are the wikipedia site
and the free eBook  of the original author. I strongly recommend
everybody to read this great book!
Mostly the 555 chips are in the -55 to +125 C temperature range - the
same we assume for our technology. And the voltage supply goes up to +18
Volt, I already saw 555 which worked with higher voltage. If we like, we
could using our BiCMOS feature for the output driver - driving the same
current with less power consumption.
The 555 chip has a legendary status between electronic engineers, radio
amateurs and tinkers. And some of them writing obeisance on hackaday.com
still in 2018 . Many variations of the chip are still in production.
Short - the 555 would be a great try-out for LibreSilicon! And I am
proud to announce that Ferenc will be our Lead for the "LS 555"
(LibreSilicon triple-5). Thanks Ferenc for your commitment!
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