DESCRIPTION

The PCA9558 is a highly integrated, multi-function device that is composed of a 5-bit multiplexed/1-bit latched 6-bit I2C/SMBus EEPROM, an 8-bit I/O expander and a 2K serial EEPROM with write protect. The PCA9558 integrates these commonly used components into a single chip to reduce component count and board space requirements and is useful in computer, server and telecom/networking applications

FEATURES

? 5-bit 2-to-1 multiplexer, 1-bit latch

? 6-bit MUX_OUTx and NON_MUXED_OUT EEPROM programmable and readable via I2C-bus

? 5 V tolerant open drain MUX_OUTx and NON_MUXED_OUT outputs

? Active-LOW override input forces all MUX_OUTx outputs to logic 0

? I2C readable MUX_INx inputs

? 5 V tolerant open drain I/Ox pins, power-up default as outputs

? 1 address pin, allowing up to 2 devices on the I2C-bus

? Active-LOW reset input with internal pull-up for the 8 I/O pins

? 2048-bit EEPROM programmable and readable via the I2C or I/Os

? Operating power supply voltage range of 3.0 V – 3.6 V

? SMBus compliance with fixed 3.3 V levels

? 2.5 V – 5 V tolerant inputs

? 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