PCA9704 gpi equivalent, 18v tolerant spi 8-bit gpi.
* 8 general purpose input ports
* 18 V tolerant input ports with 100 k external series resistor
* Input LOW threshold 0.55 VDD with minimum of 2.5 V at VDD.
Higher voltages can be tolerated on the inputs depending on the series resistor used to limit the input current.
The IN.
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