IS31IO7325

IS31IO7325 MULTI-FUNCTION I/O DRIVER August 2012 GENERAL DESCRIPTION The IS31IO7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push pull I/Os and eight open-drain I/Os and transition detection. Any of the 16 I/O ports can be configured as an input or an output. All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the INT output. The interrupt is latched, allowing detection of transient changes. When the IS31IO7325 is subsequently read through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA at 0.22V headroom, and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the IS31IO7325. The IS31IO7325 uses two address inputs to allow 4 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports. ________ _______ FEATURES         400kHz I2C serial interface 2.4V to 5.5V operation 8 push-pull I/O ports 8 open-drain I/O ports, rated to 20mA sink current at 0.22V headroom Selectable I/O port power-up default logic states _______ INT output alerts change on inputs Low 0.3μA (Typ.) standby current -40°C ~ +125°C temperature range APPLICATIONS       Cell phones Notebooks SAN/NAS Satellite radio Servers Automotive TYPICAL APPLICATION CIRCUIT VDD2 VDD1 1 uF 100k 4.7k SCL 4.7k SDA 4.7k INT RST 100...