74xx orgin

From: Sipke de Wal <sipke_at_wxs.nl>
Date: Tue May 15 13:54:31 2001

If guess Fairchild was the company that first made the 54/74xx series
The 54xx had mil. specs the 74xx had consumer specs.

The first generation was SSI (Small Scale Intergration) like gates and
flipflops, Later came MSI, like decoders, adders, counters, and even
Alu's (74181)

Over time the series also came in a variety of technologies:

74xx (Regular TTL)
74Hxx (High Power ... faster but consumed a lot of amps)
74Lxx (Low power but slow... and not very low-power by todays norm)
74LSxx (Low power Scotty ... propably the best! )

Subsequently followed up by the "modern" CMOS types like
74HCTxx or 74ALSxx etc
 
They were "second sourced" by companies like National Semiconductor,
Motorola, Texas Instruments, Siemens, Signetics et al.

Before that DTL was in vogue, like the 90xx and 93xx series
And even before that RTL was the buzzword.

Sipke de Wal
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http://xgistor.ath.cx
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----- Original Message -----
From: Hans Franke <Hans.Franke_at_mch20.sbs.de>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, May 15, 2001 1:45 PM
Subject: 74xx orgin


> When where the first 74xx ICs released / designed ?
> Especialy when where complex chips like 744x, 748x or
> 74181 first mentioned/available ?
>
> This may be a stuipd question, but I couldn't find any
> information ... so all I have is my personal guess (~1970)
> and the oldesd TTL book Philip Belben could find (1972).
>
> Anyone more informed ?
>
> Gruss
> H.
>
>
> --
> VCF Europa 3.0 am 27./28. April 2002 in Muenchen
> http://www.vcfe.org/
Received on Tue May 15 2001 - 13:54:31 BST

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