BCM6020 Datasheet, PDF (1/2 Pages) Broadcom Corporation. – SCALABLE DSL TRANSCEIVER

BCM6020
®
BCM6020 SCALABLE DSL TRANSCEIVER
FEATURES
SUMMARY OF BENEFITS
• The Broadcom BCM6020 is a single-chip QAM, twisted-pair,
scalable, digital subscriber line (DSL) transceiver that is
optimized for low-cost, low-power, and high-density
applications on both shielded and unshielded telephone wiring.
• General
• Supports bit rates to 52 Mbps and baud rates to13 Mbaud
• Less than 1W power consumption
• Integrated carrier and clock recovery loops for ease of use
• Programmable 4–256 QAM constellations
• Single 3.3V supply operation
• On-chip A/D and D/A converters
• On-chip clock generation
• Adjustable upstream and downstream center frequencies
• Extensive power management features
• JTAG test interface
• Small 100-pin PQFP form factor
• Transport interfaces
• Complete ATM UTOPIA Level 1 and 2
• Rate matching and cell delineation
• Bit-synchronous or byte-synchronous modes
• Programmable frame formats
• Coded/uncoded payload support
• Transceiver
• Transmit notching for amateur radio band compatibility
• On-chip and off-chip RAM interleaving
• Reed-Solomon FEC
• Packet scrambling
• Digital square root Nyquist filters
• x/sin x transmit pre-emphasis
• Enhanced adaptive decision feedback equalizer
• Operates up to 52 Mbps fully symmetric.
• Supports symmetric and asymmetric services.
• Operates on shielded and unshielded distribution cables.
• Suitable for CO, HDT, ONU, and CPE applications.
• Small size and low power enables high port-densities.
• Simple spectrum control through register programming.
• Supports frame-based and cell-based transport streams.
Central Office Linecard Block Diagram
Extended
Interleave RAM
Backplane
Interface
BCM6020
BPF
AMP
2W/
4W
Hybrid
POTS
Splitter
AGC
BPF
Microcontroller
Extended
Interleave RAM
AMP
BPF
POTS
Splitter
2W/
4W
Hybrid
BPF
AGC
BCM6020
Protocol
ASIC
10BASE-T
To
RJ-45
Microcontroller