High Current PIC

[Bobw]

I was looking at the Microchip.com web site to see if there was a pic that has a higher amperage rating (16F1827 is rated to 25ma) on the output pins.
I only want to drive some LEDS (200ms on max) but I am pushing close to 65 ma per led set. I would rather not have to use switching transistors.
I was not able to find a way to search on the max pin output in ma parameter.
I am looking for a chip that FC 5.5 will support.

Any ideas besides looking a spec sheet after spec sheet.

Bob

[Kenrix2]

I don't know of any PIC micro that has that high of a current rating on a single pin. If you could care less about reliability and completely ignore the maximum ratings you could try paralleling all of port B on that chip and see what happens. The Flowcode output icon does have a write to the entire port. I think I would try a pull method first rather than a push though.

[Benj]

Hello,

I'm not aware of any device which can source or sink this much current. As Kenrix says you can couple up multiple pins but I think there is an overall limitation per port of around 100mA.

16F877A specifics.

Maximum output current sunk by any I/O pin..........................................................................................................25 mA
Maximum output current sourced by any I/O pin ....................................................................................................25 mA
Maximum current sunk by PORTA, PORTB and PORTE (combined) (Note 3)....................................................200 mA
Maximum current sourced by PORTA, PORTB and PORTE (combined) (Note 3)...............................................200 mA
Maximum current sunk by PORTC and PORTD (combined) (Note 3) .................................................................200 mA
Maximum current sourced by PORTC and PORTD (combined) (Note 3) ............................................................200 mA

There is an article on the subject here but this does use transistors. Can I ask why your against using them so I can better understand what your after?
http://www.matrixmultimedia.com/article.php?a=52

[Bobw]

Ben,

That is kind of what I thought after looking at several spec sheets last night.
Can't use the entire port, need about 8 outputs. I have some small transistors I can use.

Thanks
Bob