Wanted : Pinouts for 9311, 93L14, 8273 chips

From: Peter C. Wallace <pcw_at_mesanet.com>
Date: Mon Jan 20 13:53:01 2003

On Sun, 19 Jan 2003, M H Stein wrote:

> ----------------------Original Message------------------------
> One question. Assuming the signal names are conventional, that's the same
> pinout as the '154 decoder. And yet my (ancient, hardbacked) TI TTL book
> says that while the 74154 is a logical replacement, it's not a direct
> replacement (this implies to me a different pinout). One of the pinouts I
> received had the A inputs in the oposite order (20 = A0 .. 23 = A3). Can
> somebody please check which is correct.
> -tony
> ------------------------------------------------------------------------
> Well, you'll probably get another dozen replies from the other helpful folks
> here, but the pinouts and logic tables are identical and 23=a0, 20=a3.
> I thought the same when I looked at the 9311, that it sure looked like a
> 74154 which was used everywhere, and that there must be a pinout or
> big characteristic difference to make it worth FSC's while (since they
> also made the '154, and TI, NSC and Motorola, who also made the 9311).

        Didn't the 9311 pre-date the 74154? IICRC, a lot of the the 9300
series stuff got copied by TI (9300,9316 for example) when they got the
synchronous is better message that Fairchild was promoting with the 9300
series... (wish I still had that Orange 9300 series designers guide)


>
> But the only difference I can see is that the max propagation delay is
> less on the 9311; maybe someone else will see something else.
>
> mike
>
>

Peter Wallace
Mesa Electronics
Received on Mon Jan 20 2003 - 13:53:01 GMT