MAX7312AAG

Overview

The MAX7312AAG is a 2-wire-interfaced 16-bit I/O port expander designed for SMBus and I2C applications. It provides 16 parallel input/output pins that default to inputs on power-up, featuring open-drain interrupt outputs and hot-insertion protection. The device operates within a supply voltage range of 2V to 5.5V and supports clock frequencies up to 400 kHz. It includes features such as polarity inversion, bus timeout for lock-up-free operation, and noise filters on SCL/SDA inputs. Packaged in a 24-pin SSOP (SSOP-24) format, it functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Provides 16-bit parallel I/O expansion with configurable polarity inversion registers.
• Supports hot insertion with integrated protection circuitry for system safety.
• Includes bus timeout functionality to prevent system lock-ups during communication errors.

Applications

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

Procurement Notes

Verify the specific suffix 'AAG' corresponds to the SSOP-24 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the component meets the required operating temperature range for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component when 16 general-purpose I/O lines are required alongside interrupt capabilities. It is suitable for systems needing hot-swap support and low standby current consumption. Compare against similar expanders if push-pull outputs or different package constraints are necessary, as this model utilizes open-drain outputs.

Part Context

This part belongs to the MAX7312 series of I/O expanders from Analog Devices / Maxim Integrated. It shares functional similarities with other members like the MAX7318 but differs in packaging and specific electrical characteristics. The AAG suffix specifically denotes the SSOP-24 surface-mount package configuration.

Replacement Considerations

The MAX7312ATG serves as a tape-and-reel alternative within the same family. Verify pin compatibility and output drive strength when substituting with other 16-bit I/O expanders from different manufacturers.