I have an invaluable book from Fairchild, published 1973. ¡°The TTL
Application Hanbook¡±.
I checked your need, and what I can see, the only thing you need is a divide
by 10 counter.
The 8292 is very like the old 7490, today probably the 74LS90, in that it
can easily divide by 10.
The 7490 is two counters, one modulo 2 and one modulo 5. Together they
divide by 10.
You need to make a pin adapter.
In the pdf you need the LS90 B config, I guess, in order to get a
symmetrical output.
I hope this was a step in rite dir 4 u.
/Lars
-----Ursprungligt meddelande-----
Fr?n: TekScopes@... [mailto:TekScopes@...] F?r
arthurok
Skickat: den 30 december 2006 12:26
Till: TekScopes@...; Craig Sawyers
?mne: Re: [TekScopes] 7D15 COUNTER TIMER , FAULTY U688
maybe dean kidd has one
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Show quoted text
----- Original Message -----
From: Craig Sawyers
To: TekScopes@yahoogrou <mailto:TekScopes%40yahoogroups.com> ps.com
Sent: Saturday, December 30, 2006 1:41 AM
Subject: RE: [TekScopes] 7D15 COUNTER TIMER , FAULTY U688
the XTAL osc/divider board. In fact a faulty N8292A (U688) Tek PN
156 0091 00
it seems to be wired in just as a
simple /10 divider.
Only thing I could find was a reference to it as a decade counter. Perhaps
someone on the list with an old Signetics logic book could confirm the
details (IOW why it was chosen compared with 74xx logic).
Craig
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