PCA9534D

NXP  PCA9534D  输入/输出扩展, 8bit, 400 kHz, I2C, SMBus, 2.3 V, 5.5 V, SOIC

The is a 8-bit CMOS I²C-bus and SMBus low power I/O Port with interrupt provide 8-bit of general purpose parallel Input/Output GPIO expansion for I²C-bus/SMBus applications and was developed to enhance the semiconductors family of I²C-bus I/O expanders. The improvements include higher drive capability, 5V I/O tolerance, lower supply current, individual I/O configuration, 400kHz clock frequency and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs and fans. The open-drain interrupt 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 initializes the device state machine.

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8-bit I²C-bus GPIO

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Polarity inversion register

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Active low interrupt output

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Low standby current

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Noise filter on SCL/SDA inputs

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No glitch on power-up

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Internal power-on reset