# Undocumented: Fastrack XTreme GPIO Current Ratings?

**URL:** <https://forum.sierrawireless.com/t/undocumented-fastrack-xtreme-gpio-current-ratings/4408>\
**Category:** Legacy FX/FXT series\
**Created:** [May 4, 2010, 2:25pm UTC](https://forum.sierrawireless.com/t/undocumented-fastrack-xtreme-gpio-current-ratings/4408 "2010-05-04T14:25:50Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [May 4, 2010, 2:25pm UTC](https://forum.sierrawireless.com/t/undocumented-fastrack-xtreme-gpio-current-ratings/4408/1 "2010-05-04T14:25:50Z")

</div>

Like the Supreme before it, the Xtreme has two GPIOs available in the Molex Microfit connector.

Unlike the Supreme, the voltage range of these is controlled by Vref (15V max).

But I can’t see anything in the User Guide that says what the current capability of these pins is ❓

---

_[View the full topic](https://forum.sierrawireless.com/t/undocumented-fastrack-xtreme-gpio-current-ratings/4408)._