Features
■ I²C-Bus Controlled
■ Supports AC- and DC-coupled applications
■ 5V to 8V Power Supply
■ Matches to virtually any video amplifier I PictureBooST
■ PictureBooST insertion input
■ Full-screen PictureBooST via I²C-bus
■ Context-sensitive Picture Enhancement I Video Clamping
■ Input and Output Video Clamp
■ Sync Pulse Polarity Auto-rectification
■ Clamp Pulse Generation timed either by sync or video blanking pulse I Video Processing
■ Contrast Adjustment with excellent channel matching
■ Gain stages for control of white
■ Two DC-mode cut-off ranges
■ Output DC offset control
■ Automatic Beam Limiter (ABL)
■ Video Insertion Pulse (VIP), 2 levels
■ Amplifier Control (Blanking and Stand-by) I OSD Insertion with Contrast Control I Control Output
■ Amplifier Standby and Blanking Control
■ 3 DAC for control of DC Restore Amplifier or Brightness in DC-coupled system General Description The STV9212 is an I²C-bus controlled color video processor designed for standard CRT monitor applications. It can drive systems where cathodes are either AC- or DC-coupled to the amplifier outputs. The three video channels provide contrast and white balance separate gain adjustments as well as one-per-channel DC cut-off control and common DC offset control functions. On top of these usual controls, it features context-sensitive picture enhancement circuitry to support the PictureBooST function that enhances the appearance of still pictures and moving video. In AC coupling applications, the device can pilot three cathode DC restore channels dedicated to set CRT cut-off bias voltages and to control brightness through cathodes. The RGB video outputs have a class A architecture and directly drive the amplifier channels without unnecessarily consuming current. Bandwidth limitation I²C-bus adjustments can contribute to keeping the application EMI under control. OSD (On-Screen Display) graphics are inserted by means of a Fast Blanking signal. Independent OSD contrast control facilitates adaptation to various OSD generators and provides system flexibility. The STV9212 is perfectly compatible with other ST components for CRT video boards, such as video amplifiers and OSD generators. DIP24S:(Plastic Package)