PI4IOE5V9554LEX

The PI4IOE5V9554 provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I 2C-bus/SMBus applications. It includes the features such as higher driving capability, 5V tolerance, lower power supply, individual I/O configuration, and smaller packaging. It provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc. The PI4IOE5V9554 consist of an 8-bit register to configure the I/Os as either inputs or outputs, and an 8-bit polarity register to change the polarity of the inputted data. The data for each input or output is kept in the corresponding Input or Output register. All registers can be read by the system master. The PI4IOE5V9554 open-drain interrupt output is activated and indicate to the system when any input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine. Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight devices to share the same I 2C-bus/SMBus. The PI4IOE5V9554A is identical to the PI4IOE5V9554 except that the fixed I2C-bus address is different allowing up to sixteen of these devices(eight of each) on the same I2C-bus/SMBus

Operation power supply voltage from 2.3V to 5.5 V 8-bit I2C-bus GPIO with interrupt and reset 5V tolerant I/Os Polarity inversion register Active LOW interrupt output Low current consumption 0Hz to 400KHz clock frequency Noise filter on SCL/SDA inputs Power-on reset ESD protection (4KV HBM and 1KV CDM) Offered in four different packages: TSSOP16