DESCRIPTION
The PCA9500 is an 8-bit I/O expander with an on-board 2-kbit EEPROM.
The I/O expander’s eight quasi bidirectional data pins can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs. The system
master writes to the I/O configuation bits in the same way as for the PCF8574. The data for each Input or Output is kept in the corresponding Input or Output register. The system master can read
all registers.

FEATURES
•8 general purpose input/output expander/collector
•Drop in replacement for PCF8574 with integrated 2-kbit EEPROM
•Internal 256 ×8 EEPROM
•Self timed write cycle
•4 byte page write operation
•I2C and SMBus interface logic
•Internal power-on reset
•Noise filter on SCL/SDA inputs
•3 address pins allowing up to 8 devices on the I2C/SMBus
•No glitch on power-up
•Supports hot insertion
•Power-up with all channels configured as inputs
•Low standby current
•Operating power supply voltage range of 2.5 V to 3.6 V
•5 V tolerant inputs/outputs
•0 kHz 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 JESDEC Standard JESD78 which exceeds 100 mA
•Package offerred: SO16, TSSOP16, HVQFN16