MAX7312AWG+

Overview

The MAX7312AWG+ is a 2-wire-interfaced 16-bit I/O port expander in a 24-pin Wide SO package. It operates on a supply voltage of 2V to 5.5V with a maximum clock frequency of 400kHz. The device provides 16 configurable I/O pins that default to inputs upon power-up, featuring an open-drain interrupt output and support for hot insertion. Electrical characteristics include a typical standby current of 2.9µA and low-level output currents up to 43mA at 5V. It functions within an operating temperature range of -40°C to +125°C.

Feature Summary

• Supports hot insertion with high-impedance state maintained on all pins when powered down
• Includes bus timeout functionality to prevent serial bus lock-ups
• Allows polarity inversion of input data via dedicated registers
• Configurable slave ID addresses through three address select pins

Applications

• Servers and server blades
• RAID systems
• Medical equipment
• Instrumentation and test measurement
• Networking hardware

Procurement Notes

Verify the component matches the specific 24-pin Wide SO package designation. Confirm the suffix indicates standard commercial/automotive grade specifications as defined in the official datasheet. Ensure the ordering information aligns with the manufacturer's current production status for this exact part number variant.

Selection Notes

Select this component when a 16-bit expansion is required with I2C or SMBus compatibility. Consider the 24-pin Wide SO package for board layout constraints requiring this specific footprint. Verify that the 5V overvoltage tolerant I/Os meet the system interface requirements without external level shifting.

Part Context

This part belongs to the MAX7312 series of 2-wire-interfaced I/O expanders. Other variants in the family include the AAG (SSOP), ATG (Thin QFN), and AUG (TSSOP) packages. All share identical electrical specifications and register maps, differing only in physical package dimensions and pin configurations.

Replacement Considerations

Direct replacements include MAX7312AAG, MAX7312ATG, and MAX7312AUG. These parts offer identical functionality but utilize different package types such as SSOP, Thin QFN, or TSSOP. Verify mechanical fit and thermal dissipation requirements before substituting.