BCM8211
®
2.488 GBPS SONET/SDH TRANSCEIVER WITH INTERNAL LOOP TIMING
FEATURES
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2.488-Gbps SONET/SDH transceiver with dual differential
serial I/O
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Fully integrated CDR, MUX, DEMUX, and CMU
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Selectable LVPECL/CMOS 16-bit, 155.52-Mbps interface to
framer or network processor
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On-chip PLL-based clock generator
SUMMARY OF BENEFITS
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Low power consumption eliminates external heat sinks, fans
for system airflow, and expensive high current power supplies.
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Supports SONET dual-fiber ring architecture.
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High integration reduces design cycle and time to market.
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Line and system loopback modes
Loss-of-signal output (LOSB) and input (LOSIB)
TX and RX lock detect
Elastic buffering with FIFO overflow alarm
Selectable 77.76/155.52-MHz reference clock
Selectable RX clock and RX data squelch on LOS
Selectable loop timing mode
Single 2.5V or dual 2.5V/3.3V supplies
Power dissipation: 1.2W typical
14
∞
20 mm, 128-pin PQFP package
Standard CMOS fabrication process
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Provides increased port density per board and system.
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CMOS-based device uses the most effective silicon economy of
scale.
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Meets SONET jitter requirements.
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Features low jitter: 3 mUI
rms
typical.
APPLICATIONS
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OC-48/STM-16 transmission equipment
SONET/SDH optical modules
ADD/DROP multiplexers
Digital cross-connects
ATM switch backbone
SONET/SDH test equipment
Terabit and edge routers
BCM8211 Application Block Diagram
16
16
Network Interface
Processor
BCM8211
155.52 Mbps
2.488 Gbps
BCM8211
OTX
ORX
155.52 Mbps
ORX
OTX
16
16
Network Interface
Processor
BOARDCOM [ Broadcom Corporation. ]
