hippy
Ex-Staff (retired)
This list details the current handling capabilities of PICAXE chips. Data is taken from the Microchip datasheets - These may be subject to change or re-rating and figures here are not guaranteed to be correct so always check the latest datasheets before use. E&OE.
Current "sourced through chip" is the current into VDD (V+), current "sunk through chip" is the current out of VSS (0V).
These are absolute maximum ratings at -40°C to +85°C and may need to be de-rated at more extreme temperatures. Stresses above those listed may cause permanent damage to the device. Exposure to maximum rating conditions for extended periods may affect device reliability. Please see the Microchip datasheet for full and further details on absolute maximum ratings.
PICAXE-08 ( 12F629 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk per port : 125mA
Sourced or sunk per pin : 25mA
PICAXE-08M ( 12F683 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-08M2
Sourced or sunk through chip : 170mA
Sourced or sunk per pin : 25mA
PICAXE-08M2LE
Sourced through chip : 150mA
Sunk through chip : 210mA
Sourced or sunk per pin : 25mA
PICAXE-14M ( 16F684 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-14M2
Sourced through chip : 80mA
Sunk through chip : 85mA
Sourced or sunk per pin : 25mA
PICAXE-18 ( 16F627 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-18A ( 16F819 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-18M ( 16F819 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-18M2
Sourced or sunk through chip : 170mA
Sourced or sunk per pin : 25mA
PICAXE-18X ( 16F88 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-20M ( 16F677 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-20M2
Sourced through chip : 80mA
Sunk through chip : 85mA
Sourced or sunk per pin : 25mA
PICAXE-20X2 ( 18F14K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced by all ports : 70mA
Sunk by all ports : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28 ( 16F872 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28A ( 16F872 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X ( 16F873A )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X1 ( 16F886 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-28X2 ( 18F25K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced for all ports combined : 185mA
Sunk for all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X2-5V ( 18F2520 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X2-3V ( 18F25K20 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X ( 16F874A )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A, B and E : 200mA
Sourced or sunk through port C and D : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X1 ( 16F887 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-40X2 ( 18F45K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced for all ports combined : 185mA
Sunk for all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X2-5V ( 18F2540 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X2-3V ( 18F25K40 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
Total Current Capability Summary
Current capability of 200mA and above - 08, 08M2LE, 20M, 18, 18A, 18M, 18X, 20X2, 28, 28A, 28X, 28X2, 28X2-5V, 28X2-3V, 40X, 40X2, 40X2-5V, 40X2-3V
Current capability between 100mA and 200mA - 08M2, 18M2
Current capability below 100mA - 08M, 14M, 14M2, 20M2, 28X1, 40X1
Current "sourced through chip" is the current into VDD (V+), current "sunk through chip" is the current out of VSS (0V).
These are absolute maximum ratings at -40°C to +85°C and may need to be de-rated at more extreme temperatures. Stresses above those listed may cause permanent damage to the device. Exposure to maximum rating conditions for extended periods may affect device reliability. Please see the Microchip datasheet for full and further details on absolute maximum ratings.
PICAXE-08 ( 12F629 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk per port : 125mA
Sourced or sunk per pin : 25mA
PICAXE-08M ( 12F683 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-08M2
Sourced or sunk through chip : 170mA
Sourced or sunk per pin : 25mA
PICAXE-08M2LE
Sourced through chip : 150mA
Sunk through chip : 210mA
Sourced or sunk per pin : 25mA
PICAXE-14M ( 16F684 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-14M2
Sourced through chip : 80mA
Sunk through chip : 85mA
Sourced or sunk per pin : 25mA
PICAXE-18 ( 16F627 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-18A ( 16F819 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-18M ( 16F819 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-18M2
Sourced or sunk through chip : 170mA
Sourced or sunk per pin : 25mA
PICAXE-18X ( 16F88 )
Sourced or sunk through chip : 200mA
Sourced or sunk per port : 100mA
Sourced or sunk per pin : 25mA
PICAXE-20M ( 16F677 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-20M2
Sourced through chip : 80mA
Sunk through chip : 85mA
Sourced or sunk per pin : 25mA
PICAXE-20X2 ( 18F14K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced by all ports : 70mA
Sunk by all ports : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28 ( 16F872 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28A ( 16F872 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X ( 16F873A )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A and B : 200mA
Sourced or sunk through port C : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X1 ( 16F886 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-28X2 ( 18F25K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced for all ports combined : 185mA
Sunk for all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X2-5V ( 18F2520 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-28X2-3V ( 18F25K20 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X ( 16F874A )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through port A, B and E : 200mA
Sourced or sunk through port C and D : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X1 ( 16F887 )
Sourced or sunk through chip : 95mA
Sourced or sunk per port : 90mA
Sourced or sunk per pin : 25mA
PICAXE-40X2 ( 18F45K22 )
Sourced through chip : 200mA
Sunk through chip : 300mA
Sourced for all ports combined : 185mA
Sunk for all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X2-5V ( 18F2540 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
PICAXE-40X2-3V ( 18F25K40 )
Sourced through chip : 250mA
Sunk through chip : 300mA
Sourced or sunk through all ports combined : 200mA
Sourced or sunk per pin : 25mA
Total Current Capability Summary
Current capability of 200mA and above - 08, 08M2LE, 20M, 18, 18A, 18M, 18X, 20X2, 28, 28A, 28X, 28X2, 28X2-5V, 28X2-3V, 40X, 40X2, 40X2-5V, 40X2-3V
Current capability between 100mA and 200mA - 08M2, 18M2
Current capability below 100mA - 08M, 14M, 14M2, 20M2, 28X1, 40X1