MAX7300ATI+T

Overview

The MAX7300ATI+T is a serial-interfaced I/O expansion peripheral providing 20 user-configurable ports (P12–P31) in a 28-pin TQFN-EP package. It operates on a 2.5V to 5.5V supply with a maximum shutdown current of 11µA and supports I²C communication up to 400kHz. Each port functions as a push-pull output (sinking 10mA, sourcing 4.5mA) or a Schmitt-trigger input with an optional internal pullup. Seven ports feature configurable transition detection logic that triggers an interrupt upon logic level changes.

Feature Summary

• Configurable I/O ports supporting push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• I²C-compatible 2-wire serial interface enabling up to 16 unique device addresses via two select pins
• Transition detection logic for seven specific ports generating interrupts on state changes

Applications

• White Goods
• Industrial Controllers
• System Monitoring

Procurement Notes

Verify the component matches the exact part number MAX7300ATI+T. Confirm the presence of the exposed pad on the TQFN-EP package and ensure the lead-free/RoHS-compliant status indicated by the plus suffix aligns with project requirements. Cross-reference the manufacturer's datasheet revision to validate pin configurations and electrical characteristics before finalizing procurement.

Selection Notes

Select this model when 20 I/O ports are sufficient and a compact 28-pin TQFN footprint is required. The MAX7300AAI variant offers identical functionality in a 28-pin SSOP package. For designs requiring 28 ports, consider the MAX7300ATL in a 40-pin TQFN or the MAX7300AAX in a 36-pin SSOP. Ensure the application utilizes an I²C interface rather than SPI.

Part Context

The MAX7300ATI+T belongs to the MAX7300 family of serial I/O expanders manufactured by Analog Devices/Maxim Integrated. This series provides flexible GPIO expansion for microprocessors using a standard 2-wire interface. The ATI suffix specifically denotes the 20-port configuration housed in a thermally enhanced 28-pin Thin Quad Flatpack No-Lead (TQFN) package with an exposed pad.

Replacement Considerations

The MAX7300AAI+T serves as a direct pin-compatible alternative utilizing a 28-pin SSOP package instead of TQFN.