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/Title (PCA9554 - 8-Bit I2C and SMBus I/O Port with Interrupt)
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Acrobat Distiller 10.1.16 (Windows)
BroadVision, Inc.
2020-10-07T10:55:29+02:00
2017-11-03T10:38:40-07:00
2020-10-07T10:55:29+02:00
application/pdf
PCA9554 - 8-Bit I2C and SMBus I/O Port with Interrupt
ON Semiconductor
The PCA9554 is a CMOS device that provides 8−bit parallel
input/output port expansion for I2C and SMBus compatible
applications. This I/O expander provides a simple solution in
applications where additional I/Os are needed: sensors, power
switches, LEDs, pushbuttons, and fans.
The PCA9554 consist of an input port register, an output port
register, a configuration register, a polarity inversion register and an
I2C/SMBus−compatible serial interface.
Any of the eight I/Os can be configured as an input or output by
writing to the configuration register. The system master can invert the
PCA9554 input data by writing to the active−high polarity inversion
register.
The PCA9554 features an active low interrupt output which
indicates to the system master that an input state has changed.
The device’s extended addressing capability allows up to 8 devices
to share the same bus.
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