4 Jan
2004
4 Jan
'04
10:33 p.m.
Tom Jennings wrote:
Not news, others on this list may have seen...
But I believe this/was is the last TTL chip (eg. not LS, S, etc) on the
market.
-----Forwarded Message-----
From: info.service(a)digikey.com
To: TOMJ(a)wps.com
Subject: Digi-Key Obsolete Part Bulletin
Date: 17 Dec 2003 12:40:49 -0600
You have purchased the following part number(s) from Digi-Key within the last two years.
The manufacturer has announced this part(s) will become obsolete.
FAIRCHILD SEMICONDUCTOR
Description: IC BUFFER HEX OPEN OUT 14-DIP
Manufacturer Part No: DM7407N
Digi-Key Part No: DM7407N-ND
Well, that dovetails with what I ran across while going through catalogs for the DTL/CTL
conversation:
In a Texas Instruments catalog from 1965, under "Solid Circuit Semiconductor
Networks":
NEW! Series 54 TTL - Digital
SN5400 - Quadruple 2-input Positive NAND Gate
...
... along with the 5410, 5420, 5430, 5450, 5460 and 5470, the first seven devices of the
5400/7400 series.
And just for amusement, from the same catalog, the logic family named after the missile
whose guidance system it was designed for:
MINUTEMAN SERIES DTL
SN337A, SN341A, etc.
(not compatible with standard DTL)