PCA9701 Datasheet (NXP Semiconductors)

PCA9701, 16-bit/8-bit GPI

The PCA9701/PCA9702 are low power 18 V tolerant SPI General Purpose Input (GPI) shift register designed to monitor the status of switch inputs.

It generates an interrupt when one or more of the switch inputs change state.

The input level is recognized as a HIGH when it is greater than 0.7  VDD and

PCA9701 Features

* 16 general purpose input ports (PCA9701) or 8 general purpose input ports (PCA9702)

* 18 V tolerant input ports with 100 k external series resistor

* Input LOW threshold 0.4  VDD with minimum of 2 V at VDD = 4.5 V

* Open-drain interrupt output

* Interrupt enable pin (INT_EN)