MAX7311AWG+T

Overview

The MAX7311AWG+T is a 2-wire-interfaced 16-bit I/O port expander designed for SMBus and I2C applications. It provides 16 configurable input/output ports with internal 100kΩ pullups, defaulting to inputs on 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 for lock-up-free operation. The component is specified over an operating temperature range of -40°C to +125°C and is housed in a 24-pin Wide SO package.

Feature Summary

• Supports hot insertion with high-impedance state during power-down
• Configurable polarity inversion for input data
• Bus timeout mechanism prevents serial interface lock-ups
• 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 temperature grade. Ensure compatibility with system voltage levels and I2C/SMBus timing requirements before integration. Confirm RoHS compliance status through current datasheets or supplier declarations.

Selection Notes

Select this component when 16 general-purpose I/O lines are required via a standard two-wire serial interface. Consider the wide operating temperature range and overvoltage tolerant I/Os for industrial environments. Verify that the 24-pin SO package fits the available PCB footprint constraints.

Part Context

The MAX7311 belongs to the Maxim Integrated I/O expander family, providing parallel port expansion for microcontrollers lacking sufficient GPIO pins. It utilizes a BiCMOS process and contains approximately 12,994 transistors. The device simplifies system design by integrating configuration, output, and input registers accessible through a single serial interface.

Replacement Considerations

Consult official cross-reference lists for pin-compatible alternatives. Verify electrical specifications and register maps match application requirements before substitution.