SAA7205 Philips Semiconductors, SAA7205 Datasheet - Page 4

• Manufacturer Part Number: SAA7205
• Description: MPEG-2 systems demultiplexer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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This document specifies the MPEG-2 systems demultiplexer IC, SAA7205H, for use in MPEG-2 based digital TV
receivers, possibly incorporating conditional access. Such receivers are to be implemented in, for instance, a Digital
Video Broadcasting (DVB) set-top box, or Integrated Receiver Decoder (IRD). An example of a
demultiplexer/descrambler system configuration, containing a channel decoder module, source decoders, a system
microcontroller and a conditional access system is shown in Fig.1. The main function of the demultiplexer is to separate
relevant data from an incoming MPEG-2 systems compliant data stream and pass it to both the individual source
decoders and to the system microcontroller. To support descrambling, the demultiplexer interfaces with the descrambler
part of a conditional access system (optional). The demultiplexer therefore generates a 9 MHz descrambler chip clock.
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1997 Jan 21
handbook, full pagewidth
V
V
P
f
T
SAA7205H
CLK
amb
NUMBER
SYMBOL
DDD
DDD(core)
tot
MPEG-2 systems demultiplexer
GENERAL DESCRIPTION
QUICK REFERENCE DATA
ORDERING INFORMATION
TYPE
digital supply voltage
digital supply voltage for core
total power consumption
clock frequency
operating ambient temperature
QFP128
NAME
DEMODULATOR PLUS
(AND DESCRAMBLER)
FORWARD ERROR
plastic quad flat package; 128 leads (lead length 1.6 mm);
body 28
PARAMETER
CONDITIONAL
CORRECTOR
ACCESS
SYSTEM
Fig.1 Demultiplexer system configuration.
28
9 MHz DCLK
3.4 mm; high stand-off height
MICROCONTROLLER
DESCRIPTION
SAA7205H
f
4
byte
CONDITIONS
PACKAGE
32K x 8
SRAM
9 MHz
4.5
3.0
0
MIN.
TELETEXT
DECODER
DECODER
DECODER
SOURCE
SOURCE
AUDIO
VIDEO
5.0
3.3
MGG374
TYP.
Preliminary specification
5.5
3.6
380
27
70
SAA7205H
MAX.
SOT320-2
VERSION
V
V
mW
MHz
C
UNIT