Samsung KA2143B Datasheet
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.
FUNCTIONS
• R/G/B Video Amplifier
• OSD Interface
• Contrast/OSD Contrast/SUB Contrast Control
• Blank/Clamp Gate
• Video Clamp
FEATURES
24-DIP-300
ORDERING INFORMATION
Device Package Operating Temperature
KA2143B 24-DIP-300 -20 °C ~ +70 °C
• 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
1
_
A1
+
24
RDRIVE
GOSD
BOSD
VI/OSD_SW
RIN
VCC1
GIN
GND1
BIN
CONST
OSD_ CONST
CLP
10
11
12
2
3
_
A2
5
6
+
gm1
_
+
7
SWITH
CONTROL
VIDEO
OSD
SWITCH
OSD
CONTRAST
VIDEO
CONTRAST
+
VIDEO
SUB_CONTRAST
CONTROL
VIDEO
SUB_CONTRAST
_
A3
+
-A5
-A4
8
_
9
CONTRAST
CONTROL
OSD
CONTRAST
CONTROL
gm2
CLAMP
GATE
1.5V
+
BLANK
GATE
23
22
21
20
19
18
17
16
15
14
13
GDRIVE
BDRIVE
GND24
RCLP
ROUT
VCC2
GCLP
GOUT
BCLP
BOUT
BLK
2
R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2143B
PIN CONFIGURATIONS
Table 1. Pin Configurations
Pin No Symbol I/O Configurations
1 ROSD I Red OSD Input
2 GOSD I Green OSD Input
3 BOSD I Blue OSD Input
4 VI/OSD_SW I Video or OSD Switch
5 RIN I Red Video Input
6 V
7 GIN I Green Video Input
8 GND - Ground
9 BIN I Blue Video Input
10 CONST I Contrast Control
11 OSD_CONST I OSD Contrast Control
12 CLP I Clamp Gate Signal Input
13 BLK I Blank Gate Signal Input
14 BOUT O Blue Video Output
15 BCLP - Blue Clamp Cap
16 GOUT O Green Video Output
17 GCLP - Green Clamp Cap
18 Vcc2 - VCC (output part)
19 ROUT O Red Video Output
20 RCLP - Red Clamp Cap
CC1
- VCC (normal)
21 GND - Ground
22 BDRIVE I Blue Gain Control
23 GDRIVE I Green Gain Control
24 RDRIVE I Red Gain Control
3
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