MAX7312AAG+T

Overview

The MAX7312AAG+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 that default 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 400 kHz. It features an open-drain interrupt output, bus timeout protection, and polarity inversion capabilities. The component is housed in a 24-pin SSOP package and is specified for operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Supports hot insertion with high-impedance state up to 6V during power-down
• Configurable slave ID addresses via three address select pins
• Bus timeout mechanism prevents serial interface lock-ups
• Integrated noise filters on SCL and SDA inputs

Applications

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

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 interface requirements before integration. Cross-reference part numbers with authorized distributors to confirm authenticity and availability status.

Selection Notes

Select this component when 16 general-purpose I/O lines are required with I2C or SMBus connectivity. Consider the 24-pin SSOP package for space-constrained designs requiring surface-mount assembly. Verify that the 5V overvoltage tolerant I/Os meet the system's signal level requirements without additional level shifting.

Part Context

The MAX7312 belongs to the Maxim Integrated I/O expander family, offering parallel port expansion through a serial interface. It complements other expanders like the MAX7311 by providing similar functionality but without integrated pullup resistors. The device is suitable for systems needing reliable GPIO expansion with robust fault protection features.

Replacement Considerations

Direct pin-compatible replacements include the MAX7312AWG (Wide SOIC) and MAX7312AUG (TSSOP). Verify package dimensions and thermal characteristics when substituting between different package codes within the same series.