KA2143B

APRIL. 1998 DATA SHEET KA2143B R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2143B R/G/B VIDEO AMPLIFIER The KA2143B is a very high frequency video amplifier system with OSD interface intended to be used in Monitor with high resolution up to 1024 × 768. It contains 3 matched R/G/B video Amplifiers with Blank signal and provides a flexible interfacing to DC controlled adjustment system. 24-DIP-300 FUNCTIONS R/G/B Video Amplifier OSD Interface Contrast/OSD Contrast/SUB Contrast Control Blank/Clamp Gate Video Clamp ORDERING INFORMATION Device KA2143B Package 24-DIP-300 Operating Temperature -20 °C ~ +70 °C FEATURES 3-Channel R/G/B Video Amplifier, 110MHz Bandwidth TTL OSD Input, 50MHz Bandwidth DC Contrast Control range: -38dB DC SUB Contrast Control range: -11dB Capable of 7.5VPP Output Swing Range Video/OSD high speed Switch 1 KA2143B R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS BLOCK DIAGRAM ONE (RED) OF THREE CHANNELS ROSD GOSD 1 2 3 4 _ A1 + 24 23 22 21 RDRIVE GDRIVE BDRIVE GND2 BOSD VI/OSD_SW SWITH CONTROL VIDEO SUB_CONTRAST CONTROL RIN VCC1 GIN 5 6 _ A2 + VIDEO OSD SWITCH OSD CONTRAST 20 + VIDEO SUB_CONTRAST -A5 RCLP ROUT gm1 + 7 8 GND1 BIN 9 CONTRAST CONTROL OSD CONTRAST CONTROL gm2 + CONST OSD_ CONST 10 11 12 CLP CLAMP GATE 2 _ _ VIDEO CONTRAST _ A3 + 19 18 -A4 VCC2 17 1.5V GCLP GOUT 16 15 14 BLANK GATE BCLP BOUT BLK 13 R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2143B...