MAX7314AEG+T

Overview

The MAX7314AEG+T is an I2C-compatible serial peripheral providing 16 configurable I/O ports plus one output-only port and one input-only port. It operates on a supply voltage of 2V to 3.6V with outputs rated for external loads up to 5.5V at 50mA maximum sink current. The device features an 8-bit PWM LED intensity control system, supporting global and individual brightness adjustments. It supports hot insertion, transition detection with interrupt output, and four selectable I2C addresses via the AD0 pin. Operating temperature range is -40°C to +125°C in a 24-pin QSOP package.

Feature Summary

• Configurable open-drain I/O ports with 5.5V tolerance and 50mA sink capability
• Integrated 8-bit PWM current control for LED intensity and blinking functions
• Transition detection logic with interrupt output generation
• Hot insertion support with high-impedance state during power-down

Applications

• LCD Backlights
• LED Status Indication
• Relay Drivers
• Keypad Backlights
• RGB LED Drivers

Procurement Notes

Verify the specific ordering suffix 'AEG' corresponds to the 24-pin QSOP package variant as documented in the manufacturer's ordering information table. Confirm that the '+T' designation indicates tape-and-reel packaging if required by assembly processes. Ensure the component meets RoHS compliance standards specified in the datasheet before finalizing procurement specifications.

Selection Notes

Select this component when an I2C interface is required for expanding GPIO capabilities alongside integrated LED driving functions. The 5.5V tolerant outputs allow interfacing with higher voltage loads while maintaining a low-voltage digital core. Consider the 24-pin QSOP package dimensions for PCB layout constraints and verify that the 400kHz serial clock speed meets system timing requirements.

Part Context

The MAX7314 belongs to the Maxim Integrated GPIO expansion family designed for systems requiring multiple controlled outputs with dimming capabilities. It serves as a bridge between microprocessors and peripheral devices such as LEDs or relays. The device integrates both general-purpose I/O and specialized LED control features into a single compact package, reducing overall system component count.

Replacement Considerations

The MAX7314ATG+T is a direct functional equivalent utilizing a 24-TQFN package instead of the QSOP form factor. Verify pinout compatibility and thermal dissipation requirements when substituting the QFN variant for the QSOP version in existing designs.