MAX7301AAX+TG002

Overview

The MAX7301AAX+ is a compact, serial-interfaced I/O expander providing up to 28 ports (P4–P31) controlled via an SPI-compatible 4-wire interface. It operates on a supply voltage of 2.5V to 5.5V with a maximum clock frequency of 26MHz. The device features configurable push-pull outputs capable of sinking 10mA and sourcing 4.5mA, or Schmitt-trigger inputs with optional internal pullups. Seven ports support transition detection logic that triggers an interrupt output upon logic level changes. It is housed in a 36-pin SSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Configurable push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• Logic transition detection for seven specific ports generating an interrupt signal
• Low power consumption with shutdown mode reducing current to 11µA maximum

Applications

• White Goods
• Gaming Machines
• Industrial Controllers
• System Monitoring

Procurement Notes

Verify the component against official Analog Devices documentation to confirm lead-free status and RoHS compliance. Ensure the ordering suffix matches the required package type and temperature grade. Cross-reference pin configurations and register maps to validate compatibility with existing system designs before procurement.

Selection Notes

Select this model when a high-speed SPI interface is required for expanding microprocessor I/O capabilities. The 36-pin SSOP package accommodates 28 ports, suitable for applications needing extensive GPIO expansion. Consider the 26MHz interface speed and low shutdown current for systems prioritizing performance and power efficiency.

Part Context

This component belongs to the MAX7301 series of I/O expanders manufactured by Analog Devices/Maxim Integrated. It serves as a general-purpose peripheral for adding digital input and output lines to embedded systems. The AAX variant specifically denotes the 36-pin SSOP package configuration offering 28 accessible ports.

Replacement Considerations

For a 2-wire I2C-interfaced version, refer to the MAX7300 data sheet. For a pin-compatible port expander with additional LED drive capability, refer to the MAX6957 data sheet.