BCM3140

Features:

• The BCM3140 is a universal headend advanced TDMA and SCDMA physical layer QPSK/QAM burst receiver
• DOCSIS^TM 2.0 based, IEEE 802.14, DAVIC and DVB compliant
• Programmable demodulation including BPSK, QPSK,8, 16, 32, 64, 128 and 256 QAM formats
• Variable symbol rates from 160 Kilobaud to 5.12 Megabaud providing 320 Kbps to 40 Mbps operation
• Powerful Reed-Solomon FEC decoder with byte deinterleave options for impulse/burst noise mitigation
• Burst acquisition as fast as 16 preamble symbols
• On-board 12-bit analog-to-digital converters for each channel
• Direct sampling option for DOCSIS via 12-bit digital input operating at 160 MHz with LVDS or TTL level interface options
• Powerful on-board equalizer provides ingress and adjacent channel overlap protection
• Integrated fast Fourier transform (FFT) processor with variable FFT sizes and programmable window options
• I²C or SPI-compatible microcontroller interface
• JTAG test interface
• 208-pin PQFP package
• Operates over industrial temperature range (40 to +85 C)




Description

The BCM3140 QAMLink® universal DOCSIS 2.0 burst receiver is a highly integrated solution that significantly decreases the board space and cost of demodulators in DOCSIS 2.0-based digital cable modem headend equipment. The BCM3140 provides two independent cable network receivers that burst data in A-TDMA and S-CDMA schemes. Advanced features in the BCM3140 include an analog front end (AFE), a QAM demodulator, a generalized equalizer and an enhanced Reed Solomon FEC decoder with dynamic interleaving.

The BCM3140 combined with the BCM3040 QAMLink universal modulator and the BCM3214 QAMLink CMTS MAC provides a complete solution for advanced DOCSIS 2.0-based cable headend equipment.