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

General Description

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.

Key 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.

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Other Datasheets by Maxim Integrated (now Analog Devices)

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com 19-0555; Rev 0; 5/06 24-Output PWM LED Drivers for Message Boards General Description 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) global PWM intensity (luminance) control. The MAX6974/MAX6975 feature a high-speed, fully buffered cascadable serial interface, open-circuit LED fault detection circuitry, as well as a watchdog timer. The driver has three banks of eight outputs, with each bank intended to drive a different color in RGB applications.