CMOS MAX Vss?
magnus at analogue.org
Mon Mar 2 22:04:28 CET 1998
>>>>> "EaSED" == Eric at Svetlana Electron Devices <svetengr at earthlink.net> writes:
>>> Still lacking a replacement source for some 74C components that needs
>>> to run of +12 V... the 74HC familly isn't much of a help. Anyone
>>> remember the 74C familly?
EaSED> Having been messing with CMOS logic since 1973, I hav made that
EaSED> same mistake many times.
EaSED> Here are a few easy things to remember:
EaSED> 1. Assume all 74C, 74HC, 74HCT etc. are meant for 5v only.
Hmm... so 74C where only 5V? Could you maybe crosscheck it (pleeease)?
Then I could maybe replace them with 74HC...
EaSED> 2. Assume all 4000A and 4000B are usable from 3v to 15v.
At least RCA's 4000A will only accept 12V as recommended Vss!
EaSED> 3. There are a few 74HC4000 types--assume they are 5v only.
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