General Description
The MAX7312 2-wire-interfaced expander provides 16-bit parallel input/output (I/O) port expansion in SMBus™ and I2C applications. The MAX7312 consists of input port registers, output port registers, polarity inversion registers, configuration registers, a bus timeout register, and an I2C-compatible serial interface logic, compatible with SMBus. The system master can invert the MAX7312 input data by writing to the active-high polarity inversion register. The system master can enable or disable bus timeout by writing to the bus timeout register.

FEATUREs
♦ 400kbps I2C-Compatible Serial Interface
♦ 2V to 5.5V Operation
♦ 5V Overvoltage Tolerant I/Os
♦ Supports Hot Insertion
♦ 16 I/O Pins that Default to Inputs on Power-Up
♦ Open-Drain Interrupt Output (INT)
♦ Bus Timeout for Lock-Up-Free Operation
♦ Noise Filter on SCL/SDA Inputs
♦ 64 User-Selectable Slave ID Addresses
♦ Low Standby Current (2.9µA typ)
♦ Polarity Inversion
♦ 4mm ✕ 4mm, 0.8mm Thin QFN Package
♦ -40°C to +125°C Operation

APPLICATIONs
   Servers/Blades
   RAID Systems
   Medical Equipment
   Instrumentation and Test Measurement Networking