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LM1229 Key Features

  • 2 Fully Bus Controllable via an I2C patible Interface
  • Contrast Control for Simultaneously Adjusting the RGB Output Peak to Peak Levels
  • Gain Controls for Aligning the CRT Color Temperature
  • Color Tracking Brightness Control for Maintaining Color Temperature Throughout the Full Range of Adjustment
  • Black Level Clamping to Ensure Output Level Stability. The Polarity of the Logic Pulse Input is Register Selectable
  • Digital or Analog RGB OSD Inputs, with Adjustable Transparency Available in the Digital Mode and Clamping in the Analog
  • Choice of Four Levels of OSD Amplitude
  • Window Highlight using the OSD Transparency Feature
  • ABL Input for Reducing the Video Contrast when the CRT Beam Current Exceeds the Predetermined Threshold et by an Externa
  • Horizontal and/or Vertical Blanking Directly from Deflection Signals. The Blanking can be Disabled, if Desired

Other LM1229 Datasheets

Manufacturer Part Number Description
National Semiconductor Logo National Semiconductor LM1229 I2C Compatible CMOS TV RGB and Deflection Processor

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LM1229 Description

The LM1229 pre-amp is an integrated CMOS CRT RGB preamp plus horizontal and vertical deflection processing with an I2C patible interface for controlling all the parameters necessary to directly adjust the gain, contrast and brightness and geometry of the CRT display. In the RGB section, the CRT bias is controlled by the three DAC outputs which are matched to the LM248x integrated bias clamp ICs. The brightness...

LM1229 Applications

  • Television Deflection and RGB Video Processing with TI's CRT Drivers