MAX7301ATL+TG035

Overview

The MAX7301ATL+TG035 is a serial-interfaced I/O expander providing up to 28 ports (P4–P31) in a 40-pin TQFN-EP package. It operates on a 2.5V to 5.5V supply with a maximum shutdown current of 11µA and supports clock frequencies up to 26MHz via an SPI-compatible 4-wire interface. Each port functions as a push-pull output (sinking 10mA, sourcing 4.5mA) or a Schmitt-trigger input with optional internal pullup. Seven ports (P24–P30) feature configurable transition detection logic that triggers an interrupt on P31 upon logic level changes.

Feature Summary

• Configurable push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• Maskable transition detection logic for seven specific I/O ports
• SPI-compatible 4-wire serial interface supporting daisy-chaining

Applications

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

Procurement Notes

Verify the exact ordering suffix against manufacturer documentation to confirm tape-and-reel specifications and lead-free compliance status. Ensure the component matches the required temperature range and package variant before finalizing procurement orders.

Selection Notes

Select this device when a microprocessor requires expansion of general-purpose I/O lines without consuming multiple dedicated pins. The 40-pin TQFN package is suitable for space-constrained designs requiring high pin density and thermal dissipation through the exposed pad.

Part Context

This component belongs to the MAX7301 series of compact, serial-interfaced GPIO peripherals manufactured by Analog Devices / Maxim Integrated. It serves as a digital I/O expansion solution for embedded systems needing additional control or monitoring capabilities beyond standard processor limits.

Replacement Considerations

Refer to the MAX7300 data sheet for a pin-compatible I2C-interfaced version. For applications requiring constant-current LED drive capability, consider the MAX6957 as a compatible alternative.