PCA9557

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9557 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-kHz 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 mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) 2 Description This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. The device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)]. The PCA9557 consists of one 8-bit configuration (input or output selection), input port, output ...