At 05:28 AM 2/10/2004 -0700, you wrote:
>Wouter van Ooijen wrote:
>
>>>The 74HC595 is hefty BUS-driver part, and can pump a lot of
>>
>>
>>What is the maximum (peak and average if they differ) current for a
>>HC595 output pin? I recall reading the datasheet but not finding this
>>info.
>>
>>Wouter van Ooijen
>
>I don't think I've seen a spec, either, but I think I calculated about
>40mA sink/source.

http://focus.ti.com/lit/ds/symlink/sn74hc595.pdf
http://www.fairchildsemi.com/ds/MM/MM74HC595.pdf
http://www.fairchildsemi.com/ds/MM/MM74HC595.pdf

Abs. max. 70mA or 75mA through Vdd/Vss (sorry Vcc/GND, I guess nobody told
it that it was CMOS and not TTL) pins, +/-40mA or +/-35mA maximum per output.
That's Abs. max ratings, with all that implies.

The outputs are characterized and the drop is guaranteed at 6mA/5V.

Best regards,

speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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