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From: roger@hpnmdla.hp.com (Roger Petersen)
Newsgroups: sci.electronics
Subject: Re: What's the fastest TTL-compatible XOR gate available commercially ?
Message-ID: <7380022@hpnmdla.hp.com>
Date: 10 Apr 91 02:23:11 GMT
References: <40750@netnews.upenn.edu>
Organization: HP Network Measurements Div, Santa Rosa, CA
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In sci.electronics, Al Broscius <broscius@grad1.cis.upenn.edu> writes:

| Hi Folks,
|
| 	Does anyone know of any TTL-compatible XOR gates that beat the 74F86 
| in maximum propagation delay ??  The NatSemi F series databook lists a maximum
| propagation delay of 7nS.  

You could check out the 74AS86.  AS is typically slightly faster
than F (but you have to deal with the faster edge rates too).
My latest AS databook only shows typical prop. delays, no worst case,
so I don't know how fast they really are.

I didn't see any XOR gates in my AC/ACT databooks.

A brute-force approach would be to use a 5 ns PAL.
I think you can even get a 4.5 ns PAL from AMD,
since they've added a few more GND pins to the package.

Roger