On Thu, 8/20/15, Mouse <[email protected]> wrote:
> Maybe _rated_ current, but, even there, I don't think so (my TTL
> doc hasn't been unpacked yet, or I'd go check, but I'm fairly sure
> they are generally specced to sink more current to GND
> than source from Vcc).
It so happens I have a TTL handbook to hand at the moment. From
the 1985 TI TTL data book:
Ioh Iol
7400 -0.4 16
74H00 -0.5 20
74LS00 -0.4 8
74S00 -1 20
all in mA. So as rated, TTL devices can sink a solid order of
magnitude more current than they can source.
BLS
