74185 IC (binary to BCD converter) don't work in Proteus

Question

I try to design circuit that convert 10 bit binary to BCD with 74185 IC in Proteus, but when i run this project output of this IC like this attached picture is unknown(IC don't work! and i didn't receive any error!) and I did active enable. why? and how can give suitable output?

In this attached image i try to convert 5 bit binary to BCD and i test enable input with a LOGICPROBE and change it, but still IC don't work.

EDIT like this link i use from resistor network and all output were 1. Weird ULN2003 to 7-segment behaviour in Proteus

Can you post a screenshot of the device when you search for it in the parts list? It may be that it doesn't have a SPICE model, hence having undefined outputs, and using pullup resistors will make them all high. — MCG, Jan 14 '20 at 13:14

score 1 · Answer 1 · answered Jan 04 '20 at 15:43

1

Outputs of 74185 are open collector.

answered Jan 04 '20 at 15:43

thanks, and can you say that how to fix it? – Reyhane Jan 04 '20 at 15:57
@James Please consider adding more information so OP can modify his circuit accordingly? Your one liner is helpful, but with more context it could help OP. – MadHatter Jan 04 '20 at 16:44
@Reyhane, google `open collector outputs` – jsotola Jan 04 '20 at 19:03
I have updated this question. – Reyhane Jan 04 '20 at 20:31

74185 IC (binary to BCD converter) don't work in Proteus

1 Answers1