what is the maximum pin sink current, IOL??

xiao · ‎2006-06-01

Posted on June 01, 2006 at 13:54

xiao · ‎2011-05-17

Posted on May 17, 2011 at 12:10

please help to find out the upsd3354 maximum pin sink current limit, IOL. I could not find it out from the data sheet.

Could I directly use a GPIO pin to sink about 25mA current, for example, to drive a LED?

hanwayh · ‎2011-05-17

Posted on May 17, 2011 at 12:10

IOL is 10 mA at VOL = 0.6V for port 4 and is 8 mA for Port A, B, C, and D. However, the total operating current in Turbo mode is about 79 mA (5V) or 63 mA (3.3 V).

Driving LED with 20 mA is too much for the MCU.

han-way