MAX7301ATL+

Overview

The MAX7301ATL+ is a compact, serial-interfaced I/O expander providing up to 28 user-configurable ports (P4–P31). It operates on a supply voltage range of 2.5V to 5.5V and features an SPI-compatible 4-wire interface supporting clock speeds up to 26MHz. Each port can be individually configured as a push-pull logic output capable of sinking 10mA and sourcing 4.5mA, or as a Schmitt-trigger logic input with optional internal pullup. The device includes transition detection for seven specific ports (P24–P30) and utilizes a 40-pin TQFN-EP package.

Feature Summary

• Configurable push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• Maskable transition detection logic for monitoring logic level changes on multiple ports
• Low power consumption with dedicated shutdown mode reducing supply current
• Daisy-chainable architecture allowing control of multiple devices via a single serial bus

Applications

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

Procurement Notes

Verify the component matches the exact MAX7301ATL+ designation to ensure correct pinout and package type. Confirm RoHS compliance status aligns with project requirements. Check datasheet revisions for any updates to electrical characteristics or timing parameters before finalizing integration into the design.

Selection Notes

Select this model when a high-density GPIO solution is required within a small footprint. The 40-pin TQFN-EP package is suitable for applications needing extensive port expansion without consuming significant board space. Ensure the host microcontroller supports the required SPI protocol and that the operating voltage range matches the system's power supply rails.

Part Context

This component belongs to the MAX7301 series of I/O expanders manufactured by Maxim Integrated. It serves as a general-purpose peripheral to extend the digital I/O capabilities of microprocessors. The AT suffix indicates the specific 40-pin TQFN-EP package variant, distinguishing it from other package options like SSOP available in the same product family.

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.