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BCM8212
(R)
TRANSCEIVER WITH INTERNAL LOOP TIMING AND PHASE DETECTOR
FEATURES * 2.488-Gbps SONET/SDH transceiver with dual differential
serial I/O * Fully integrated CDR, MUX, DEMUX, and CMU with 16-bit, 155.52-MHz LVPECL interface * On-chip, PLL-based clock generator
SUMMARY OF BENEFITS * Low power consumption eliminates external heat sinks, fans * * * * *
for system airflow, and expensive high current power supplies. Supports SONET dual-fiber ring architecture.8212-PB05-R High integration reduces design cycle and time to market. Provides increased port density per board and system. Features low jitter: 3 mUIRMS typical.
* * * * * * * * * * *
Internal phase detector and charge pump for cleanup PLL 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 Dual 2.5V/3.3V supplies Power dissipation: 1.2W typical
Selectable divide-by-32 or divide-by-16 receiver/ transmitter low-speed parallel output clock * Standard CMOS fabrication process * 23 23 mm, 208-pin BGA package
CMOS-based device uses the most effective silicon economy of scale. * Exceeds SONET jitter requirements, which allows the use of low-cost optics. * Target applications: * OC-48/STM-16 transmission equipment * SONET/SDH optical modules * ADD/DROP multiplexers * Digital cross-connects * ATM switch backboneONET/SDH test equipment * SONET/SDH test equipment * Terabit and edge routers
Application Block Diagram
16
16
Network Interface Processor
BCM8212
155.52 Mbps
2.488 Gbps
BCM8212
OTX
ORX
155.52 Mbps
ORX
OTX
16
16
Network Interface Processor

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