MAX7301ATL+T

Overview

The MAX7301ATL+T is a serial-interfaced I/O expander providing up to 28 ports in a 40-pin TQFN-EP package. It operates on a 2.5V to 5.5V supply with a maximum clock frequency of 26MHz via an SPI-compatible 4-wire interface. Each port supports push-pull output (sinking 10mA, sourcing 4.5mA) or Schmitt-trigger input with internal pullup. Seven ports feature configurable transition detection logic generating an interrupt. 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

• Configurable push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• Transition detection logic for seven specific ports with interrupt generation
• Low power consumption with dedicated shutdown mode
• High-speed serial interface compatible with standard protocols

Applications

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

Procurement Notes

Verify the component matches the exact part number MAX7301ATL+T before purchase. Confirm the package type is 40-pin TQFN-EP and that it meets the required operating temperature range of -40°C to +125°C. Ensure the supplier provides documentation confirming lead-free and RoHS compliance as indicated by the plus suffix.

Selection Notes

Select this component when a microprocessor requires expansion of general-purpose I/O lines using a standard serial bus. It is suitable for designs needing configurable logic levels and transition monitoring. Consider the 40-pin TQFN-EP package constraints and ensure adequate PCB space for the exposed pad connection to ground.

Part Context

This device belongs to the MAX7301 series of compact, serial-interfaced I/O expanders manufactured by Analog Devices / Maxim Integrated. It serves as a GPIO peripheral for microprocessors, offering flexible port configuration through a simple serial interface. The family includes variants with different pin counts and packages to suit various system integration requirements.

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.