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PCA9654EA

Part Number	PCA9654EA
Manufacturer	ON Semiconductor
Description	8-bit I/O Expander
Published	Sep 2, 2015
Detailed Description	PCA9654E, PCA9654EA 8-bit I/O Expander for I2C Bus and SMBus with Interrupt The PCA9654E/PCA9654EA provides 8 bits of Ge...
Datasheet	PCA9654EA PDF File

Overview

PCA9654E, PCA9654EA 8-bit I/O Expander for I2C Bus and SMBus with Interrupt The PCA9654E/PCA9654EA provides 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C−bus/SMBus applications.
The PCA9654E/PCA9654EA consists of 8−bit Configuration (Input or Output selection), Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers.
The system master may set the I/Os as either inputs or outputs by writing to the I/O configuration bits.
The data for each Input or Output is kept in the corresponding Input or Output register.
The polarity of the read register can be inverted with the Polarity Inversion register.
All registers can be read by the system master.
The PCA9654E/PCA9654EA open−drain interrupt (INT) output is activated when any input state differs from its corresponding input port register state and is used to indicate to the system master that an input state has changed.
The power−on reset sets the registers to their default values and ini...

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