935261222557 Просмотр технического описания (PDF) - Philips Electronics
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935261222557 Datasheet PDF : 36 Pages
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Philips Semiconductors
ATSC 8-VSB demodulator and decoder
Preliminary specification
TDA8960
FEATURES
General features
• One-chip Advanced Television Systems Committee
(ATSC)-compliant demodulator and concatenated trellis
(Viterbi)/Reed Solomon decoder with de-interleaver and
de-randomizer
• 0.4 µm process
• 3.3 V device
• 64-lead QFP64 package
• Boundary scan test
• Output format: 8-bit wide bus.
8-VSB demodulator
• On-chip digital circuitry for tuner Automatic Gain Control
(AGC)
• Square root raised cosine filter with 11.5% roll-off factor
• Fully internal carrier recovery loop
• Mostly internal clock recovery and AGC loops with
programmable loop filters
• External indication of demodulator lock.
Adaptive equalizer
• Feed forward including a Decision Feedback Equalizer
(DFE) structure
• Range of −2.3 to +10.5 µs
• Adaptation based on ATSC field sync (trained) and/or
8-VSB data (blind)
• Trellis (Viterbi) decoder
• Rate 2⁄3 (Rate 1⁄2 Ungerboeck code based).
I2C-bus interface
• I2C-bus interface to initialize and monitor the
demodulator and Forward Error Correction (FEC)
decoder. Operation without I2C-bus control is possible
(default).
DOCUMENT REFERENCES
See the ATSC URL on ‘http://www.atsc.com’ for the
following related documents:
• “ATSC Digital Television Standard” (document no. A/53,
issued 1995 Sep 16)
• “Guide to the use of the ATSC Digital Television
Standard” (document no. A/54, issued 1995 Oct 04).
APPLICATIONS
• Digital ATSC compliant TV receivers
• Personal computers with digital television capabilities
• Set-top boxes.
Reed Solomon decoder
• (207, 187 and T = 10) Reed Solomon code
• Internal convolutional de-interleaving (I = 52; using
internal memory)
• External indication of uncorrectable error; transport error
indicator bit in Motion Picture Export Group (MPEG)
packet header is also set
• Followed by de-randomizer based on ATSC standard.
ORDERING INFORMATION
TYPE
NUMBER
TDA8960
PACKAGE
NAME
DESCRIPTION
VERSION
QFP64 plastic quad flat package; 64 leads (lead length 1.95 mm); body 14 × 20 × 2.8 mm SOT319-2
1999 Jun 14
2
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