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LM1246 Datasheet Rgb Preamplifier

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM1246 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs November 2003 LM1246 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The LM1246 pre-amp is an integrated CMOS CRT preamp.

It has an I2C compatible interface which allows control of all the parameters necessary to directly setup and adjust the gain and contrast in the CRT display.

Brightness and bias can be controlled through the DAC outputs, which are well matched to the LM2479 and LM2480 integrated bias clamp ICs.

Key Features

  • n Fully addressable 512 Character OSD, simiilar in features to the LM1237/LM1247, with selectable 2 byte character addressing or LM1247 bank select modes n Internal 512 character OSD ROM usable as either (a) 384 2-color plus 128 4-color characters, (b) 640 2-color characters, or (c) some combination in between n Internal 512 character RAM, which can be displayed as one single or two independent windows n Enhanced I2C compatible microcontroller interface to allow versatile Page RAM access n n Ap.

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