# Sink / Source current capacity of the i/o

**URL:** <https://forums.digi.com/t/sink-source-current-capacity-of-the-i-o/1292>\
**Category:** XBee - 802.15.4\
**Created:** [March 18, 2009, 2:54pm UTC](https://forums.digi.com/t/sink-source-current-capacity-of-the-i-o/1292 "2009-03-18T14:54:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MDT123](https://avatars.discourse-cdn.com/v4/letter/m/e79b87/32.png) [@MDT123](https://forums.digi.com/u/MDT123)\
**Post date:** [March 18, 2009, 2:54pm UTC](https://forums.digi.com/t/sink-source-current-capacity-of-the-i-o/1292/1 "2009-03-18T14:54:27Z")

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Does anyone know what the sinking or sourcing current capacity is on the XBEE I/O pins? I Couldn’t find it in any of the documentation.

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**Author:** ![johnf](https://avatars.discourse-cdn.com/v4/letter/j/848f3c/32.png) [@johnf](https://forums.digi.com/u/johnf)\
**Post date:** [March 18, 2009, 5:09pm UTC](https://forums.digi.com/t/sink-source-current-capacity-of-the-i-o/1292/2 "2009-03-18T17:09:12Z")

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In my own notes, I have this:

When a digital output is in the low state, it can sink up to 2mA with the voltage level being no higher than 0.5V. In the high state it can source 2mA with the voltage being no lower than VCC - 0.5.

I must have found that somewhere, but I’m afraid I didn’t make a note of where it came from. If it’s important to you, it’d be better to check with Digi or see whether anyone confirms or denies my note.