Description
www.DataSheet4U.com 19-0555; Rev 0; 5/06 24-Output PWM LED Drivers for Message Boards General .
The MAX6974/MAX6975 precision current-sinking, 24-output PWM LED drivers drive red, green, and blue LEDs for full-color graphic message boards and vid.
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 Exte
Applications
* The full-scale current for each bank of eight outputs is adjustable from 6mA to 30mA in 256 steps (0.3125% per step) to calibrate each color. The MAX6974/MAX6975 can optionally multiplex by using outputs MUX0 and MUX1, which each drive an external pnp transistor. Multiplexing doubles the MAX6974/MA