MAX7310ATE+T

Overview

The MAX7310ATE+T is an 8-bit I/O port expander with a 2-wire interface, operating from 2.3V to 5.5V. It features a 400kHz clock frequency and operates between -40°C and +125°C. The device includes bus timeout for lock-up-free operation, polarity inversion, and 56 slave ID addresses. It defaults to inputs on power-up and offers a 5V tolerant open-drain output on I/O0. Standby current is typically 1.7µA.

Feature Summary

• Provides 8-bit parallel input/output port expansion via SMBus-compatible and I2C-compatible serial interfaces.
• Includes bus timeout functionality to ensure lock-up-free operation by resetting the serial bus interface if SCL or SDA remains low for over 30ms.
• Features polarity inversion registers allowing system masters to invert input data logic levels.

Applications

• Servers
• RAID Systems
• Industrial Control
• Medical Equipment
• Instrumentation, Test Measurement

Procurement Notes

Verify the component against official Analog Devices documentation to confirm authenticity. Ensure the ordering suffix matches the required package type and temperature range. Check for RoHS compliance status as indicated in the manufacturer's specifications before finalizing procurement.

Selection Notes

Select this component when an 8-bit GPIO expander with a 2-wire interface is required. Consider the 2.3V to 5.5V supply range and -40°C to +125°C operating temperature. Verify that the 400kHz maximum clock speed and 56 available slave addresses meet system design constraints.

Part Context

The MAX7310 belongs to the Maxim Integrated I/O expander family, designed for general-purpose input/output expansion. It utilizes a BiCMOS process and contains 10,256 transistors. The device is specified for automotive temperature ranges and supports multiple package options including TSSOP, QSOP, and Thin QFN.

Replacement Considerations

MAX7310AUE (TSSOP-16), MAX7310AEE (QSOP-16). These variants share identical electrical characteristics and functionality but differ in physical package dimensions and pin configurations.

FAQ

How does the bus timeout feature function?

The bus timeout feature resets the serial bus interface if either SCL or SDA is held low for more than 30ms minimum and 60ms maximum after the start of a valid serial transfer, preventing lock-ups.

What is the default state of the I/O pins upon power-up?

All eight I/O pins default to inputs on power-up. An active-low reset input can also be used to set the eight I/Os as inputs.

Can the polarity of input data be inverted?

Yes, the system master can invert the MAX7310 input data by writing to the active-high polarity inversion register.