2-Wire-Interfaced 8-Bit I/O Port Expander with Reset

The MAX7310 provides 8-bit parallel input/output port expansion for SMBus™-compatible and I²C-compatible applications. The MAX7310 consists of an input port register, an output port register, a polarity inversion register, a configuration register, a bus timeout register, and an SMBus/I²C-compatible serial interface. The system master can invert the MAX7310 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.

Any of the eight I/O ports can be configured as input or output. An active-low reset input sets the eight I/Os as inputs. Three address-select pins configure one of 56 slave ID addresses.

The MAX7310 is available in 16-pin thin QFN, TSSOP, and QSOP packages and is specified over the -40°C to +125°C automotive temperature range.

Applications

* Cellular Handsets * Desktop Computers: Motherboards * GPIO * Industrial Control * Industrial Displays * Instrumentation and Test Measurement * Medical Equipment * RAID Systems * Servers * White LED Drivers

* 400kHz 2-Wire Interface

* 2.3V to 5.5V Operation

* Low Standby Current (1.7µA typ)

* Bus Timeout for Lock-Up-Free Operation

* 56 Slave ID Addresses

* Polarity Inversion

* Eight I/O Pins that Default to Inputs on Power-Up

* 5V Tolerant Open-Drain Output on I/O0

* 4mm x 4mm, 0.8mm Thin QFN Package

* -40°C to +125°C Operation