MAX6974ATL+

LED Driver IC Overview

The MAX6974ATL+ is a 24-output PWM LED driver designed for message boards and signage. It features a linear shift register interface operating at up to 33 MHz. The device provides constant current output of 30 mA per channel with open LED protection. It operates within a supply voltage range of 3 V to 3.6 V and supports an ambient temperature range of -40°C to +125°C. The component is housed in a 40-pin TQFN package.

LED Driver IC Feature Summary

• Integrates 24 constant-current outputs with independent PWM dimming control for precise brightness management.
• Utilizes a high-speed serial interface for efficient data transmission and display updating.
• Includes hardware-based open LED detection to enhance system reliability and fault indication.

LED Driver IC Applications

• Outdoor and indoor full-color LED message boards
• Large-scale LED signage displays
• Industrial control panel indicators

LED Driver IC Procurement Notes

Verify the specific suffix (+) indicates lead-free compliance when sourcing. Confirm the 40-TQFN package dimensions match the target PCB footprint. Ensure the 3.6 V maximum supply voltage aligns with the system power design. Check for availability constraints as this component may have limited stock or restricted distribution channels.

LED Driver IC Selection Notes

Select this driver for applications requiring high-density LED control with minimal microcontroller overhead. The 30 mA output current suits standard indicator LEDs but may require external transistors for higher-power loads. Consider the thermal performance of the TQFN package in enclosed environments. Verify that the 33 MHz clock speed meets the refresh rate requirements of the display application.

LED Driver IC Part Context

This component belongs to the Maxim Integrated LED driver family, specifically optimized for large-scale display applications. It replaces older discrete driver solutions by integrating multiple channels into a single compact IC. The device is part of Analog Devices' portfolio following the acquisition of Maxim Integrated, maintaining compatibility with existing Maxim design ecosystems.

LED Driver IC Replacement Considerations

The MAX6974ATL- serves as a non-compliant variant of the same functional device. Designers should verify if lead-free certification is mandatory for the end product before substituting between these suffixes. No other direct pin-compatible replacements are documented in the provided reference material.