MAX6974 (MAX6974 / MAX6975) 24-Output PWM LED Drivers

MAX6974 (MAX6974 / MAX6975) 24-Output PWM LED Drivers

The MAX6974/MAX6975 precision current-sinking, 24-output PWM LED drivers drive red, green, and blue LEDs for full-color graphic message boards and video displays. Each output has an individual 12-bit (MAX6974) or 14-bit (MAX6975) PWM-intensity (hue) control and 7-bit (MAX6974) or 5-bit (MAX6975) glo.

Features

o 24 LED Current Sink Outputs (Three Banks of Eight Outputs) o 48 LED Drive Option When Multiplexing o 33MHz Clock Supports Up to 63 Frames per Second of Video o Constant Output Current Calibration from 6mA to 30mA in 256 Steps o EZCascade™ Interface Simplifies Multiple Driver Cascading Without External Buffers o 12-Bit or 14-Bit Individual PWM LED Intensity Controls o 7-Bit or 5-Bit Panel PWM-Intensity Control o +3V to +7V LED Power Supply o +3.0V to +3.6V Logic Supply o Open-Circuit LED Fault Detection o Optional Watchdog Timer Blanks Display if Interface Fails o Standard -40°C to +125°C Ope.