BCM8211 Datasheet, PDF (1/2 Pages) Broadcom Corporation. – 2.488 GBPS SONET/ SDH TRANSCEIVER WITH INTERNAL LOOP TIMING

BCM8211
®
2.488 GBPS SONET/SDH TRANSCEIVER WITH INTERNAL LOOP TIMING
FEATURES
SUMMARY OF BENEFITS
• 2.488-Gbps SONET/SDH transceiver with dual differential
serial I/O
• Fully integrated CDR, MUX, DEMUX, and CMU
• Selectable LVPECL/CMOS 16-bit, 155.52-Mbps interface to
framer or network processor
• On-chip PLL-based clock generator
• 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
• Low power consumption eliminates external heat sinks, fans
for system airflow, and expensive high current power supplies.
• Supports SONET dual-fiber ring architecture.
• High integration reduces design cycle and time to market.
• Provides increased port density per board and system.
• CMOS-based device uses the most effective silicon economy of
scale.
• Meets SONET jitter requirements.
• Features low jitter: 3 mUI_rms typical.
APPLICATIONS
• 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
155.52 Mbps
16
OTX
ORX
2.488 Gbps
ORX
OTX
16
155.52 Mbps
16