26 Oct
2010
26 Oct
'10
3:59 p.m.
Was there ever such a thing as a 74x00 series LED driver that did proper hex
decoding and not simply BCD? I can't seem to find that there was.
The topic of why split octal was used on some early micro-computers came up
on a list. After doing a search for a TTL LED driver that does hex, the
answer is probably that there were no single chip option for hex displays.
Split octal was just easier.
This kind of joins in with the TIL311 discussion. It was a TTL compatible
hex display, but expensive at the time.
-chuck