Picaxe 28X - max. mA to source or sink??

[domwild]

Unless I am mistaken I do not think that the technical manuals indicate the max. mA which can be sourced/sink(ed).

Thanks for the info.

 

 

[inglewoodpete]

The PicAxe 28X is burnt into a Microchip PIC16F873A-I/SP. Check the Microchip data sheet since it specifies the hardware's capability.

Edited due to fit fangers ;o)

Edited by - inglewoodpete on 05/04/2007 08:55:05

 

[chipwich]

Common knowledge is that you can generally source or sink 20-25mA from an i/o pin. The datasheet from microchip for the PIC16F873A sets this spec at 25ma.

 

[hippy]

Note that there is also a maximum 'per port' rating ( usually around 100mA) so you cannot draw 25mA from 5 Outputs at the same time.

 

[Dippy]

Get yourself downloaded copies of the Data Sheets.
The document (DS30292C) for the 16F87x range shows:-
1. Max per pin = 25mA source & sink
2. Max total = 200mA source & sink.
3. Max into Vdd = 250mA
4. Max out of Vss = 300mA
5. Max V on any pin wrt Vss = -0.3 to (Vdd +0.3V)

But as with ALL components you use it is best to:-
A) Download and READ data sheets.
B) Play safe and stay comfortably within limits.