16 Nov
2009
16 Nov
'09
12:54 a.m.
Chuck Guzis wrote:
The part is labeled 7439DC, quad OC buffer.
Other than a different pinout, how does this differ from a plain old
7438?
Acording to my 1989 TI databook, the 7439 has "Garantted current sinking
of 80ma", and "Garunteed fan out of 30 series 54/74 loads"
Both of which may be needed if the thing is driving printer components.
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.