"tempus fugit" wrote in message
...
Hey all;

I want to drive LEDs directly from the outputs of a 74LS373N latch, but I
can't figure out which parameter is the maximum current I can get from it.
I've enclosed the data sheet. On p. 6, there's a then a different 1 on p.
9
IOH High-level output current

and

IOL Low-level output current


then a different 1 on p. 9. Can anyone tell me which parameter I should be
looking at? Or am I looking at teh wron g thing altogether?

Thanks

Looks like you can source 2.5ma, sink 24ma with a maximum of 40ma combined
total per device. The 74HC373 can do much better, sourcing or sinking 35ma
with a total of 70ma per device. I typically use a darlington driver array
to buffer LEDs from logic IC's. Lookup Digikey part number TD62083AF-ND.
It's cheap, TTL compatible, and can easily drive 8 high current LED's
without straining your logic IC.

Chris