PCA9557 Datasheet | Texas Instruments

Product Folder Sample & Buy Technical Documents Tools & Software Support & munity SCPS133J - DECEMBER 2005 - REVISED JUNE 2014 PCA9557 Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Reset and Configuration Registers 1 Features - 1 Low Standby Current Consumption of 1 μA Max - I2C to Parallel Port Expander - Operating Power-Supply Voltage Range of 2.3 V to 5.5 V - 5-V Tolerant I/O Ports - 400-k Hz Fast I2C Bus - Three Hardware Address Pins Allow for Use of up to Eight Devices on I2C/SMBus - Lower-Voltage Higher-Performance Migration Path for PCA9556 - Input/Output Configuration Register - Polarity Inversion Register - Active-Low Reset Input - Internal Power-On Reset - High-Impedance Open Drain on P0 - Power Up With All Channels Configured as Inputs - No Glitch on Power Up - Noise Filter on SCL/SDA Inputs - Latched Outputs With High Current Drive Maximum Capability for Directly Driving LEDs - Latch-Up Performance Exceeds 100 m A Per JESD 78, Class...