[Fwd: Digi-Key Obsolete Part Bulletin]

From: Brent Hilpert <hilpert_at_cs.ubc.ca>
Date: Mon Jan 5 03:33:57 2004

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_at_digikey.com
> To: TOMJ_at_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)
Received on Mon Jan 05 2004 - 03:33:57 GMT