QAMLink® DOCSIS®/EuroDOCSIS™ 2.0 Single-Chip Cable Modem
The BCM3349 combines an RF receiver with an advanced QAM and S-CDMA demodulator, an advanced QAM transmitter, a complete DOCSIS 2.0 Media Access Controller (MAC), a 200-MHz MIPS32 communication processor, a 16-bit, 100-MHz SDRAM interface, 10/100 Ethernet MAC with integrated transceiver and MII Interface, and a USB MAC with integrated transceiver.
The QAM receiver directly samples a tuner output with a 11-bit A/D converter and input ACG amplifier. The receiver digitally resamples and demodulates the signal with recovered clock and carrier timing, filters and equalizes the data and passes soft decisions to an ITU-T J.83 Annex A/B/C compatible decoder. The receiver supports variable symbol rate 4/16/32/64/128/256/512/1024-QAM FEC decoding. The final received data stream is delivered in a serial MPEG-2 transport format. All gain, clock, and carrier, acquisition and tracking loops are integrated in the QAM receiver.
- DOCSIS®/EuroDOCSIS™ 2.0 cable modem providing unprecedented levels of integration and performance
- The BCM3349 integrates a high performance 200 MHz MIPS32™ CPU
- Advanced RF and control interface to silicon tuner for DOCSIS/EuroDOCSIS solutions
- Results in simplified BOM - optimized for two layer PCB designs, reduces component count, improves assembly process and results in lowest overall system cost.