TDA8446 Philips Semiconductors, TDA8446 Datasheet - Page 4

• Manufacturer Part Number: TDA8446
• Description: Fast RGB/YC switch for digital decoding
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PINNING
1995 Feb 16
SOUT
SIN
CCL
n.c.
CLO
n.c.
BIN
GIN
RIN
SW1
n.c.
CLI
CIN
COUT
YIN
FS
n.c.
n.c.
SW2
n.c.
YOUT
n.c.
n.c.
V
VINT
V
SYMBOL
(R-Y)
(B Y)
CC
EE
Fast RGB/YC switch for digital decoding
DIP20
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
PIN
SO28
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
11
1
2
3
4
5
6
7
8
9
synchronization signal output; this output provides the synchronization information
extracted from the incoming signal at pin 2 (SIN).
synchronization signal input; CSYNC or CVBS signal from the peri-connector
clamping capacitor connection; the clamping pulse is generated by external circuitry
connected to this pin, the generated pulse clamps the RGB inputs.
not connected
clamping pulse output
not connected
B-signal input
G-signal input
R-signal input
clamping control signal input; this TTL signal is used to select the clamp signal, a LOW
level at this input forces the circuit to output the generated clamping pulse.
not connected
clamping pulse input; this TTL signal indicates the black level clamping period for the
incoming Y signal (active-HIGH).
chrominance signal input
chrominance signal output
luminance signal input; this input also accepts the CVBS signal
fast switching signal input; this signal is used to control fast switching of the luminance
signals, a HIGH level at this input forces the circuit to output the internal Y signal.
not connected
not connected
gain control signal input; this TTL signal is used to set the gain of the chrominance
amplifiers (A), a LOW level at this input forces the gain A to 6 dB (HIGH forces to 0 dB).
not connected
luminance signal output
not connected
not connected
positive supply voltage (+12 V)
internal decoupling
ground
(R Y) signal output
(B Y) signal output
4
DESCRIPTION
Product specification
TDA8446