TDA6812-5 Datasheet, PDF (1/32 Pages) Siemens Semiconductor Group – TV-Stereo Processor

TV-Stereo Processor
Preliminary Data
TDA 6812-5
Bipolar IC
Features
q High quality stereo signal processing
q High S/N ratio
q I²C Bus
q Clipping detector and clock generator
q NICAM or AM sound inputs
q Volume control
q Universal audio interface for DOLBY, EQUALIZER,
SURROUND SOUND features
q Multiplex 3-SCART connections
q Independent headphones
P-DIP-40-2
Type
TDA 6812-5
Ordering Code
Q67000-A5127
Package
P-DIP-40-2
TDA 6812-5 is a complete system for stereo TV-sound, controlled on an I²C Bus. The device is
made up of three functional blocks.
1. Stereo Processing with High Quality (better than DIN 45500; suitable for NICAM and CD for
G-standard with I2C-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
2. 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
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06.94