Often these parts can be replaced with MSI TTL counter/decoder/logic chips
with just a slight change in wiring.
I don't know if the SD102 is the Nixie driver, but there are substitutes
for Nixie drivers too.
I don't know exactly what the SD102 does, but if your friend has the
Monsanto 110B schematics he can see what the chip does and how to
substitute for it.
Tim N3QE
On Sun, Mar 1, 2015 at 10:13 AM, jim s jwsm...@jwsss.com wrote:
Hi,
I have friend with a question about an IC badged with Monsanto. I
googled a bit and found that there is a big line of older maybe 60's era
counter / timers which were made and badged Monsanto.
I am asking here if anyone has some of these or have a knowledge of
whether they may have custom IC's. It isn't out of the question that this
is a custom front end part, or perhaps some part of a timer circuit they
may have developed.
The ebay link to the part is below, as is a search string for monsanto on
Tucker Electronics manual web page.
The question if for a friend who has the IC for sale. Any info
appreciated.
thanks
Jim
http://www.etestmanuals.com/Search.aspx?Mfg=MON
Ebay listing for a monsanto counter / timer
VINTAGE-Monsanto-110B-Programmable-Counter-Timer-/
http://www.ebay.com/itm/331268326313
Monsanto IC:
Monsanto-SD102-Vintage-Very-Rare-White-Ceramic-Gold-Zebra-Grey-Trace-IC-/
http://www.ebay.com/itm/371270297731
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