MAX7312AUG+T

Overview

The MAX7312AUG+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, an open-drain interrupt output (INT), and supports hot insertion with high-impedance protection up to 6V when powered down. The device operates within a supply voltage range of 2V to 5.5V and features a 400kHz serial interface clock frequency. It includes bus timeout functionality for lock-up-free operation and polarity inversion registers. The component is specified over an operating temperature range of -40°C to +125°C and is housed in a 24-pin TSSOP package.

Feature Summary

• Supports hot insertion with high-impedance protection on all pins when powered down
• Configurable 16-bit I/O ports with power-on reset defaulting to inputs
• Open-drain interrupt output activates on input state changes
• Bus timeout feature prevents serial bus lock-ups

Applications

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

Procurement Notes

Verify the specific ordering suffix AUG+T corresponds to the 24-pin TSSOP package variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor declarations. Ensure the procurement channel provides valid traceability for Analog Devices/Maxim Integrated components to avoid counterfeit parts.

Selection Notes

Select this component when 16 general-purpose I/O expansion is required via I2C or SMBus interfaces. It is suitable for systems needing hot-swap capability and wide operating voltage ranges from 2V to 5.5V. Consider the TSSOP package constraints for PCB layout and thermal management in dense designs.

Part Context

The MAX7312 belongs to the Maxim Integrated I/O expander family, offering parallel I/O expansion through a serial interface. It is part of a broader series that includes variants like the MAX7311 and MAX7313, differentiated by features such as integrated pullup resistors or PWM capabilities. The AUG suffix specifically denotes the TSSOP package option within this product line.

Replacement Considerations

Direct pin-compatible replacements may include other MAX7312 variants with different packages (e.g., MAX7312AWG for SOIC). Verify register compatibility and electrical characteristics before substituting with other I/O expanders.