MAX7311AAG+T

Overview

The MAX7311AAG+T is a 2-wire-interfaced 16-bit I/O port expander designed for SMBus and I2C applications. It provides 16 configurable input/output pins with internal 100kΩ pullups, defaulting to inputs upon power-up. The device operates within a supply voltage range of 2V to 5.5V and supports a maximum clock frequency of 400kHz. It features an open-drain interrupt output, polarity inversion registers, and bus timeout functionality to prevent lock-ups. The component is specified for operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Supports hot insertion with high-impedance state during power-down
• Configurable polarity inversion for input data
• Bus timeout mechanism ensures lock-free serial interface operation
• Noise filtering on SCL and SDA inputs

Applications

• Servers
• RAID Systems
• Industrial Control
• Medical Equipment
• PLCs

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and tape-and-reel configuration. Ensure the component meets required RoHS compliance standards for the target application environment. Cross-reference the full part number with authorized distributor catalogs to validate current availability status and lead times before finalizing procurement plans.

Selection Notes

Select this component when 16 bidirectional I/O lines are required alongside interrupt capabilities. Verify that the system master supports standard I2C or SMBus protocols compatible with the 400kHz speed limit. Confirm that the operating voltage aligns with the 2V to 5.5V range and that the SSOP-24 package fits the PCB layout constraints.

Part Context

This device belongs to the MAX7311 series of I/O expanders manufactured by Analog Devices Inc./Maxim Integrated. It serves as a peripheral interface solution for microcontrollers needing additional digital ports. The AAG suffix indicates the SSOP-24 package variant, while the T suffix typically denotes tape-and-reel packaging for automated assembly processes.

Replacement Considerations

Consult the datasheet for pin-compatible alternatives such as the MAX7312 if external pullup resistors are undesirable. Verify electrical characteristics and register maps before substituting with other I/O expanders in the same family.