<Yes, you're right. The same Signetics data book lists the 74LS367 as
<having a typical propagation delay of 10ns. Incidentally, if I claimed
<8us for the 8T97, that was a typo, I meant 8ns, of course.
<
<Anyway, the 74F367 (I looked in the Philips databook) claims a typical
<delay of 5ns, so that should easily replace the 8T97 (provided decoupling
<an layout is OK - these FAST chips like to cause ground-bounce, etc).
At that time the difference of 2-4nS was insignificant relative to CPU
timing and memory timing. At the time the 8t97 was vogue memories were
fast at 250nS and typically 450ns was the norm for Eproms. I freely
swapped 8t97s with '367s based on availability. Also as time wore on the
8t97 would disappear and the '367 would get faster. Moot point in general
then.
Allison
Received on Mon Jun 21 1999 - 22:06:35 BST