I was looking at the Xbee 1mW datasheet and saw that there was no maximum voltage for digital Input. I think some people supply xbee with 3.3V and interface RX/TX pin with a 5V microcontoller without any interface. Is this safe? Datasheet http://ftp1.digi.com/support/documentation/90000982_H.pdf …

Xbee digital Input/Output voltage

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