RTFM. https://www.smcelectronics.com/DOWNLOADS/1976-TTL%20DATABOOK.PDF http://www.ti.com/lit/sl/scyd013b/scyd013b.pdf http://www.huergo.edu.ar/tcweb/pdf/DS.pdf http://bitsavers.trailing-edge.com/components/fairchild/_dataBooks/1987_Fair... http://bitsavers.trailing-edge.com/components/motorola/_dataBooks/1993_Motor... https://www.ti.com/lit/ug/scbd152b/scbd152b.pdf http://ae6pm.com/Semidata_books/Motorola/DL131-D.pdf http://www.introni.it/pdf/RCA%20-%20CMOS%20Ic%20Databook%20SSD%20250C%201973... The early data books in particular (e.g., RCA 1973, Figures 2, 3) should have very useful information about CMOS internals that were taken for granted and no longer documented later on.

On Sun, Dec 1, 2019 at 5:58 AM Hagen SANKOWSKI hsank@posteo.de wrote:

-------- Forwarded Message -------- Subject: Fwd: [Libre-silicon-devel] Reminder - Next Mumble session on Sunday, 24/11/2019, 21.00 HKT Date: Mon, 25 Nov 2019 06:38:36 +0100 From: Hagen SANKOWSKI hsank@posteo.de To: Éger Ferenc eegerferenc@gmail.com

Hello Ference!

Seems, that the attachement was to big for the mailing list. Hence I forward this directly to you.

Hagen.

-------- Forwarded Message -------- Subject: Re: [Libre-silicon-devel] Reminder - Next Mumble session on Sunday, 24/11/2019, 21.00 HKT Date: Sun, 24 Nov 2019 17:31:19 +0100 From: Hagen SANKOWSKI hsank@posteo.de To: libresilicon-developers@list.libresilicon.com

Hello List, Hello Ference!

Regarding the topics we had today in the Mumble session:

here is a small discussion about the Schmitt-Trigger I had in mind, which points also to *both* sources I am aware of

https://electronics.stackexchange.com/questions/301158/cmos-schmitt-trigger-...

attached a data book scan regarding TTL input current (I_iL, I_iH) - sorry in German only - for some TTL families. While nobody is using 74xx anymore, I guess we should be comparable to a 74LSxx standard input-load with our TTL Input Pad.

Best Regards, Hagen. -- support LibreSilicon to get back into the Clean Room https://www.gofundme.com/f/libresilicon-cleanroom-rent