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+--- Thread: is HP 67 display driver part 1858-0050 compatible with CA3082? (/thread-16383.html)
is HP 67 display driver part 1858-0050 compatible with CA3082? - dmh - 02-27-2021 02:39 AM
Looking for a replacement for a suspected dead 1858-0050 HP 67 display driver and I've seen mention on the forums that it is both custom HP and that it is not and is compatible with a CA3082 which can still be located.
Does someone have a definitive answer?
Alternatively, if anyone has a spare 1858-0050 or donor 67 they want to get rid of please let me know.
TIA, dmh
RE: is HP 67 display driver part 1858-0050 compatible with CA3082? - Steve Simpkin - 02-27-2021 06:58 AM
(02-27-2021 02:39 AM)dmh Wrote: Looking for a replacement for a suspected dead 1858-0050 HP 67 display driver and I've seen mention on the forums that it is both custom HP and that it is not and is compatible with a CA3082 which can still be located.
Does someone have a definitive answer?
Alternatively, if anyone has a spare 1858-0050 or donor 67 they want to get rid of please let me know.
TIA, dmh
Well there appears to be a good chance that it is an RCA CA3082 NPN 7-transistor array.
http://www.brouhaha.com/~eric/hpcalc/chips/
Perhaps someone else more knowledgeable will confirm that.
RE: is HP 67 display driver part 1858-0050 compatible with CA3082? - AndiGer - 02-27-2021 12:10 PM
If you have one segment missing across the whole display you can replace the appropriate transistor out of the network/chip. There is an article on the net somewhere.
RE: is HP 67 display driver part 1858-0050 compatible with CA3082? - albertofenini - 03-04-2021 11:42 AM
Hi everyone
it is a good replacement part, but as said it all depends what's the failure you are trying to fix ...
take care !!