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I have two identical circuit boards using IC MM74HC123 one manufactured by Fairchild Semiconductor the other by Philips. The Fairchild chip when used in the circuit will announce any length of message the Philip circuit won't announce the longer messages. I don't have a circuit diagram for the...
Hi,
I've got a problem with a third of my communications units not working correctly. I've narrowed the problem down to one PCB (and have eliminated all the obvious faults), the only noticeable difference between the working and none working PCB is that the IC 73M550-IP on the working boards...
Hi,
I'm trying to find datasheets for an IC numbered 73M550-IP and can't find one anywhere online through the old google method. Any suggestions where I could find one? Also really want one from TDK and one from Silicon Systems if possible encase these are different.
Many thanks
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