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150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD and 4 DACs [Obsolete]
National Semiconductor
Description
The LM1237 pre-amp is an integrated CMOS CRT preamp. More...
Features
• I2C compatible microcontroller interface
• Internal 254 character OSD usable as either (a) 190 2-color plus 64 4-color characters, (b) 318 2-color characters, or (c) some combination in between.
• OSD override allows OSD messages to override video and the use of burn-in screens with no video input
• 4 DAC outputs (8-bit resolution) for bus controlled CRT bias and brightness
• Spot killer which blanks the video outputs when VCC falls below the specified threshold
• Suitable for use with discrete or integrated clamp, with software configurable brightness mixer
• H and V blanking (V blanking is optional and has register programmable width)
• Power Saving Mode with 80% power reduction
• Matched to LM246x driver and LM2479/80 drivers
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