TDA6812-5 ,TV Stereo Sound Processing with High ...TV-Stereo Processor TDA 6812-5Preliminary Data Bipolar IC
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TDA6812-5
TV Stereo Sound Processing with High ...
SHEMENS
TV-Stereo Processor TDA 6812-5
Preliminary Data Bipolar IC
Features
0 High quality stereo signal processing
0 High S/N ratio
0 12C Bus
0 Clipping detector and clock generator
0 NICAM or AM sound inputs
0 Volume control
0 Universal audio interface for DOLBY, EQUALIZER,
SURROUND SOUND features
0 Multiplex 3-SCART connections P-DlP-40-2
0 Independent headphones
Type Ordering Code Package
TDA 6812-5 Q67000-A5127 P-DIP-40-2
TDA 6812-5 is a complete system for stereo TV-sound, controlled on an PC Bus. The device is
made up of three functional blocks.
Stereo Processing with High Quality (better than DIN 45500; suitable for NICAM and CD for
G-standard with IzC-controlled crosstalk compensation; selectable gain 0/6 dB
a) Three stereo AF-inputs
b) Random switching of all inputs to all outputs
c) Stereo SCART-interface
d) Stereo loudspeaker signal section with volume precontrol, treble/bass control, enlargement of
quasi-stereo/stereo sound base, separate L/R-volume control, equalizer interface after tone
control
e) Stereo headphones signal section with Ch1/Ch2 and volume control
TV-Identification-Signal Decoder
a) Active pilot-tone filter
b) Phase-independent rectifier with very narrow bandwidth for identification-signal decoding
c) Digital integrator for noise rejection
d) Multiplexer for cyclic scanning for stereo or dual-sound identification
e) Externally synchronized PLL for reference-signal generation: synchronization with line sync
pulse or 62.5-kHz clock, integrated crystal oscillator and 4-MHz crystal, or with external
4-MHz timing signal
113 06.94
SIEMENS;
TDA 6812-5
3. Control
a) 120 Bus interface with listen/talk function
b) Control of entire audio processing
c) Reading of clipping detector
d) Control of identification-signal decoder
e) Reading of identification-signal decoder
f) Test modes
Pin Functions
Pin No. Function
1 AF-input mono, left, sound 1 (adjustable)
2 Bias AF-operating point
3 AF-input, right, sound 2
4 N.C.
5 54-kHz input
6 54-kHz filter
7 SCART-input 1, left
8 SCART-input 1, right
9 SCART-input 2, left
10 SCART-input 2, right
11 SCART-input 3, left
12 SCART-input 3, right
13 AF-output SCART (mono, sound 1, left)
14 AF-output SCART (mono, sound 2, right)
15 Output port 1 (open collector)
16 Output port 2 (open collector)
17 Phase shifter quasi-stereo
18 Phase shifter quasi-stereo
19 Cut-off frequency bass (sound base), left
20 Cut-off frequency bass (sound base), right
21 AF-output, loudspeaker, right
22 AF-output, loudspeaker, left
23 N.C.
24 AF-input, volume control, right
Semiconductor Group 114
