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0Hz to 400kHz clock frequency. Bus Frequency 400kHz. IC Interface Type I2C, SMBus. 8 Bit I2C Bus GPIO. Active LOW interrupt output. The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders.
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