TLC5940NT

Overview

The TLC5940NT is a 16-channel constant-current sink LED driver manufactured by Texas Instruments. It features individually adjustable 4096-step grayscale PWM brightness control for each channel and 64-level constant current dot correction stored in EEPROM. The device operates with a serial data input mode and supports a display mode suitable for dot matrix applications. It is housed in a 28-pin DIP package, designed for standard input characteristics without multiplexed display functions.

Feature Summary

• Provides 16-channel constant-current sinking capability for precise LED control
• Integrates 4096-step grayscale PWM for high-resolution brightness adjustment per channel
• Includes EEPROM-based dot correction to ensure uniform LED appearance across channels

Applications

• LED lighting driver circuits requiring individual channel dimming
• Dot matrix display systems utilizing serial data input
• Applications necessitating uniform LED brightness through point correction

Procurement Notes

Verify the specific package type against project requirements, as the TLC5940 family includes HTSSOP and VQFN variants alongside the NT DIP version. Confirm that the 28-pin DIP form factor aligns with PCB layout constraints. Ensure compatibility with the required operating temperature range of -40°C to 85°C for the intended environment before finalizing procurement decisions.

Selection Notes

Select this component when independent grayscale control and dot correction are critical for visual consistency. The 16-channel architecture suits medium-density LED arrays. Consider the serial interface requirements for system integration. Verify that the DIP package is preferred over surface-mount options for prototyping or specific assembly needs.

Part Context

This part belongs to the TLC5940 series of LED drivers from Texas Instruments. It shares core functional specifications with other variants like the PWPR (HTSSOP) and RHB (VQFN), differing primarily in packaging. The series is designed for applications demanding high-precision LED management with built-in calibration capabilities.

Replacement Considerations

Direct substitutes include TLC5940PWPR and TLC5940RHB, which share identical electrical functionality but differ in package style. Ensure the replacement package matches the board design constraints.