14 Oct
2015
14 Oct
'15
1:45 p.m.
On 10/14/2015 1:45 PM, Brent Hilpert wrote:
From original sources/refs I have kicking around:
- The first 54xx devices were introduced by TI in 1965.
- 74xx was around by 1966.
- H & L was around by 1969.
- S was around by 1971.
- LS was around by 1973.
- ALS was around by 1981. I have a vague recollection of seeing ALS parts with 79 date
codes.
I suspect ben(OP) was alluding to when now-current or last-current TTL was introduced.
I found a Fast databook from ~1980 from bitsavers.
It is the odd chips that are harder to find like 6 bit identity
comparator. Not that I need one, but it was on a S100 bus board
I had once.Ben.