TEA5114A
RGB SWITCHING CIRCUIT
.
.
.
.
.
25MHz BANDWIDTH
CROSSTALK : 55dB
SHORT CIRCUIT TO GROUND OR V
CC
PRO-
TECTED
ANTI SATURATION GAIN CHANGING
VIDEO SWITCHING
DIP16
(Plastic Package)
ORDER CODE :
TEA5114A
PIN CONNECTIONS
DESCRIPTION
This integrated circuit provides RGB switching al-
lowing connections between peri TV plug, internal
RGB generator and video processor in a TV set.
The input signal black level is tied to the same ref-
erence voltage on each input in order to have no dif-
ferential voltage when switching two RGB genera-
tors.
An AC output signal higher than 2 Vpp makes gain
going slowly down to 0dB to protect the TV set video
amplifier from saturation.
Fast blanking output is a logicial OR between FB1
(Pin 8) and FB2 (Pin 10).
BLOCK DIAGRAM
R
1
INPUT
GND
R
2
INPUT
G
1
INPUT
G
2
INPUT
B
1
INPUT
B
2
INPUT
FB
1
INPUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
R OUTPUT
FB
R
INPUT
V
CC
G OUTPUT
FB
G
INPUT
B OUTPUT
FB
2
+ FB
B
INPUT
FB OUTPUT
5114A-01.EPS
16
15
14
13
12
11
10
9
G=2
V
REF
G=2
G=2
OR
1
2
3
4
5
6
7
8
May 1996
1/4
5114A-02.EPS
TEA5114A