MAX7301AAX+

Overview

The MAX7301AAX+ is a compact, serial-interfaced I/O expander providing up to 28 ports. It operates on a supply voltage of 2.5V to 5.5V and features a high-speed 26MHz SPI-compatible 4-wire interface. Each port is individually configurable as a push-pull logic output (sinking 10mA, sourcing 4.5mA) or a Schmitt logic input with optional internal pullup. Seven ports support configurable transition detection logic that generates an interrupt upon logic level changes. The device includes shutdown mode with a maximum current of 11µA and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Industry-standard 4-wire serial interface simplifies expansion of I/O ports independent of microprocessor architecture
• Logic transition detection for seven I/O ports generates an interrupt upon change of port logic level
• Low power consumption reduces power-supply requirements with minimal shutdown current

Applications

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

Procurement Notes

Verify the component authenticity by checking the manufacturer's marking against official datasheet specifications. Confirm the package type matches the required pin count and footprint dimensions. Ensure the operating voltage and temperature ranges align with the target system design constraints before finalizing procurement.

Selection Notes

Select this model when a 36-pin SSOP package is required for 28 I/O ports. Compare against the MAX7301AAI+ if a 28-pin package with 20 ports is sufficient for the application. Consider the MAX7300 series if a 2-wire I2C interface is preferred over the 4-wire SPI interface.

Part Context

This component belongs to the MAX7301 family of GPIO peripherals manufactured by Analog Devices / Maxim Integrated. It serves as a general-purpose I/O expansion solution for microprocessors requiring additional digital inputs and outputs via a standard serial bus.

Replacement Considerations

The MAX7301ATL+ offers identical functionality in a 40-pin TQFN-EP package. For applications requiring a 2-wire interface instead of 4-wire, the MAX7300 series provides a compatible alternative.