SAA7282 Datasheet, PDF (2/25 Pages) NXP Semiconductors – Terrestrial Digital Sound Decoder TDSD2

Philips Semiconductors
Terrestrial Digital Sound Decoder (TDSD2)
Product specification
SAA7282
FEATURES
• Full EBU NICAM 728 specification decoder
• Microcomputer controlled via I²C-bus
• Automatic decoding and output configuration depending
upon transmission:
– digital stereo
– digital mono and data
– 2 independent mono signals
• On board RAM for de-interleaving and 10 to 14-bit word
expansion
• Automatic mute function which silences the digital data
and switches to FM sound (if valid) when error rate
exceeds user definable limit
• User mute function (MUTE pin) to enable user to
perform muting to their own software algorithm if
required, or to simply silence the output
• 4 times over-sampling digital filter
• Selectable digital de-emphasis
• 256 times over-sampling Noise Shapers
• Fully integrated 1-bit DACs
• Integrated switching networks allowing selection
between NICAM Sound, FM Sound or external
“Daisy-Chain” input
• Digital Audio Interface conforming with EBU/IEC 958
• I²C-bus transceiver enabling a master device to read
– status information
– error count byte
– additional data bits
and write:
– switch control codes
– decoder control
– upper and lower error rate limits.
APPLICATIONS
• Television receivers
• Video cassette recorders.
GENERAL DESCRIPTION
Performing all digital decoding functions for a NICAM 728
digital stereo sound system, the SAA7282 is a highly
integrated CMOS circuit which only requires a DQPSK
(Differential Quadrature Phase Shift Keying) demodulator
(TDA8732) and minimum external components to achieve
a full NICAM solution.
The device may also be interfaced to other DQPSK
demodulators.
QUICK REFERENCE DATA
SYMBOL
V_DD
I_DD
f_XTAL
T_amb
PARAMETER
positive supply voltage
supply current
crystal frequency
operating ambient temperature
MIN.
4.5
−
−
0
TYP.
5.0
50
8.192
−
MAX.
5.5
100
−
70
UNIT
V
mA
MHz
°C
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
SAA7282ZP
SAA7282GP
PINS
32
44
PIN POSITION
DIL32SHR
QFP
PACKAGE
MATERIAL
plastic
plastic
Note
1. SAA7282ZP: 32-DIL32SHR; plastic (SOT232A); SOT232-1; 1996 November 28.
2. SAA7282GP: 44-QFP; plastic (SOT205AG); SOT205-1; 1996 November 28.
July 1993
2
CODE
SOT232A⁽¹⁾
SOT205AG⁽²⁾