Dual Universal DVB-C2/C/T2/T/S

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The Si21642C integrates two separate high-performance digital demodulators for the DVB-T2/T, DVB-C2/C, DVB-S2/S and DVB-S2X standards into a single compact package. Leveraging Silicon Labs' proven digital demodulation architecture, the Si21642C achieves excellent reception performance for each media while significantly minimizing front-end design complexity, cost, and power dissipation. Connecting the Si21642C to both a dual terrestrial/cable TV tuner, and a dual satellite tuner, results in a high-performance and cost optimized TV front-end solution.

Silicon Labs' internally developed DVB-C2 demodulator can accept a standard IF (36 MHz) or low-IF input (differential) and support all modes specified by the DVB-C2 standard. The main features of the DVB-C2 mode are 4096-QAM, 6 or 8 MHz bandwidth, management of notch insertion (broadband and narrowband), and support of multiple data slices and PLPs.

DVB-T2 (including T2-Lite) demodulators support all modes specified by the DVB-T2 standard (V1.4.1). Main features of the DVB-T2 mode are, SISO and MISO support, FEF management, fully autonomous signal acquisition including automatic L1 signaling parsing support for all pilot patterns, and DVB-T2/T auto-detection. The DVB-T and DVB-C, including ITU-T J.83 annex B, demodulators are enhanced versions of proven and broadly used Si2164/67/68/69 Silicon Labs devices.

The satellite reception allows demodulating widespread DVB-S, DIRECTV™  (DSS),  DVB-S2,  DIRECTV™  (AMC)  legacy standards, and new Part II of DVB-S2 (S2X) satellite broadcast standard. A zero-IF interface (differential) allows for a seamless connection to market proven satellite silicon tuners. It also integrates two DiSEqC™ 2.0 LNB interfaces for satellite dish control and, for each satellite demodulator, an equalizer to compensate for echoes in long cable feeds from the LNB to the satellite tuner RF input.

The Si21642C offers an on-chip blind scanning algorithm for DVB-S/S2/S2X and DVB-C standards, as well as blind lock function. The Si21642C embeds two independent programmable transport stream interfaces which provide a flexible range of output modes, including a cross-bar functionality, and are fully compatible with all MPEG decoders or conditional access modules to support any customer application.

Symmetry Electronics is an authorized Silicon Labs distributor.


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Pin-to-pin compatible with all dual demodulator family: Si216x2 and Si218x2
API compatible with all single and all dual demodulators
DVB-T2 and T2-Lite (ETSI EN 302 755-V1.4.1)
Bandwidth: 1.7, 5, 6, 7 or 8 MHz
NorDig Unified 2.5 and D-Book 8 compliant
DVB-C2 (ETSI EN 302 769-V1.2.1)
16-QAM to 4096-QAM OFDM demodulation
DVB-T (ETSI EN 300 744)
NorDig Unified 2.5, D-Book 8 compliant
DVB-C (ETSI EN 300 429) / ITU-T J.83 Annex A/B/C
1 to 7.2 MSymbol/s, C-Book compliant
DVB-S2 (ETSI EN 302 307-1 V1.4.1)
QPSK/8PSK demodulator
DVB-S2X (ETSI EN302 307-2 V1.1.1)
QPSK/8PSK, 8/16/32APSK demodulator
Roll-off factors from 0.05 to 0.35
Channel bonding for TS transmission supported
DVB-S (ETSI EN 300 421) and DSS supported
Dual DiSEqC 2.x interface, Unicable support
1 to 45 MSps for all satellite standards (<40 MSps in 32APSK)
IC serial bus interfaces (master and host)
Upgradeable with firmware patch download via fast SPI or IC (broadcast mode supported)
Dual independent differential IF input for T/C tuners and differential ZIF I/Q inputs for satellite tuners
GPIOs and multi-purpose ports (two per demodulator)
Separate flexible TS interfaces with serial or parallel outputs and cross-bar feature
Fast lock times for all standards
Only two power supplies: 1.2 and 3.3 V
8x8 mm, QFN-68 pin package, Pb-free/RoHS compliant

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Dual Universal DVB-C2/C/T2/T/S
Part #: Si21642-C60-GM
Dual Universal DVB-C2/C/T2/T/S