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General description

The PCA9538 is a 16-pin CMOS device that provides 8 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push-buttons, LEDs, fans, etc.

Features

■ 8-bit I2C-bus GPIO with interrupt and reset

■ Operating power supply voltage range of 2.3 V to 5.5 V

■ 5 V tolerant I/Os

■ Polarity Inversion register

■ Active LOW interrupt output

■ Active LOW reset input

■ Low standby current

■ Noise filter on SCL/SDA inputs

■ No glitch on power-up

■ Internal power-on reset

■ 8 I/O pins which default to 8 inputs

■ 0 Hz to 400 kHz clock frequency

■ ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

■ Offered in three different packages: SO16, TSSOP16 and HVQFN16