I.MX Interfacing with Darlington array

Aug 26, 2009 1 Replies

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Bhavani 16 years ago

I want to interface the GPIOs of my micro (I.MX series) with Darlington array like ULN280x or UDN 2981 or MIC2981. How do I know from the datasheets of these ICs that any of these these are compatible with GPIO (3.3V) logic levels which are (Voh = min 2.6V and Vol = max 0.66)?

Also can I connect the GPIOs directly with these Darlington arrays or through any current limiting resistor?

-bhav

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Nico Coesel 16 years ago

The datasheet of the ULN280x should tell you that. Resistors aren't required. I've used the ULN280x in a 3.3V application, but not at full current.

Failure does not prove something is impossible, failure simply indicates you are not using the right tools... "If it doesn\'t fit, use a bigger hammer!" --------------------------------------------------------------

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