BCM8211 ® 2.488 GBPS SONET/SDH TRANSCEIVER WITH INTERNAL LOOP TIMING SUMMARY OF BENEFITS FEATURES • 2.488-Gbps SONET/SDH transceiver with dual differential • Low power consumption eliminates external heat sinks, fans 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 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 mUIrms typical. Elastic buffering with FIFO overflow alarm APPLICATIONS 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 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 ORX 2.488 Gbps ORX OTX 155.52 Mbps 16 Network Interface Processor OTX BCM8211 155.52 Mbps 16 BCM8211 16 Network Interface Processor • • • • • • • • • • • • • • • OVERVIEW FIFO Control RESETB CLK16IP OVFB Write Pointer DI15 CKSEL 16 x 5 Input Register DI0 16:1 Parallelto-Serial FIFO CLK16IN Read Pointer B Output Retime TXDP TXDN M U X TXCKP TXCKN F RTSYNC REF155EN A M U X REFCKP D B F TCK16OP Divide-by-16 TCK16ON TXLKDT 2.488-GHz PLL REFCKN DOSQ RCK16SQ C RDINP1 RDINN1 SELRD1 CLKPMODE D DATPMODE E LOSIB C 1:16 Serialto-Parallel M U X Output Register RDINP0 RDINN0 Loopback Logic TSEL LPBKSB DO0 E DO15 D CDR LP BKFB E A Divide-by-16 RCK16OP RCK16ON RXLKDT Loss Detect The BCM8211 SONET/SDH transceiver is a fully integrated serialization/deserialization SONET OC-48 and SDH STM-16 (2.488 Gbps) interface device with an integrated Clock Multiplication Unit (CMU) and an integrated Clock and Data Recovery (CDR) circuit. Onchip clock synthesis is performed by the high-frequency, low-jitter, phase-locked loop on the BCM8211 transceiver, allowing the use of a slower 77.76/155.52 MHz external transmit clock reference. LOSB The low-jitter LVPECL/CMOS interface guarantees compliance with the bit error rate requirements of the Telcordia GR-253-CORE, ANSI, and ITU-T standards. The BCM8211 is packaged in a 14 x 20 mm, 128pin PQFP. The BCM8211 operates in either single 2.5V or dual 2.5/3.3V configuration. The core and CML I/O operate at 2.5V and the LVPECL I/O can operate at either 2.5V or 3.3V. Dual RX and TX 2.488-Gbps interfaces support dual-fiber ring architectures. Clock recovery is performed on the device by synchronizing its on-chip VCO directly to the incoming data stream. Broadcom®, the pulse logo, and Connecting everything® are trademarks of Broadcom Corporation and/ or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the property of their respective owners. ® BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 © 2004 by BROADCOM CORPORATION. All rights reserved. 8211-PB06-R 07/02/04 Phone: 949-450-8700 Fax: 949-450-8710 E-mail: [email protected] Web: www.broadcom.com