Funny that you mentioned it. We used it with great success but recently
decided
to change our design to use a separate shift register and a ULN driver. The
main reason was to avoid availability problems (not that we had any).

Tal

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Chris Eddy
> Sent: Monday, May 06, 2002 11:56 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: Cool driver chip that can expand I/O
>
>
> I have been using a part from TI, the TPIC6595, that takes serial in, 8
> parallel out, and can be chained in series. I think a lot of folks on
> the list will like this part.
>
> It has 8 open drain outputs, and each FET has a zener back to the gate.
> That way, when back EMF comes along, it turns itself on long enough to
> absorb the pulse and then it goes off again. No diodes across inductive
> loads!
>
> Good for leds, relays, whatever. You can even mix the high side voltage
> on the devices (ULN200X had to have one voltage)
>
> And digikey carries it!!
>
> Chris~
>
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