LM1247 Datasheet (National Semiconductor)

LM1247, RGB Preamplifier

The LM1247 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

LM1247 Features

* 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 Applications n Low end 15" and 17" bus controll