PCA9534 port equivalent, 8-bit i2c and smbus/ low power i/o port.
* 8-bit I2C GPIO
* Operating power supply voltage range of 2.3 V to 5.5 V
* 5 V tolerant I/Os
* Polarity inversion register
* Active low interrupt ou.
and was developed to enhance the Philips family of I2C I/O expanders. The improvements include higher drive capability, .
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