BCM8211_04

BCM8211 ® 2.488 GBPS SONET/SDH TRANSCEIVER WITH INTERNAL LOOP TIMING FEATURES • 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 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. High integration reduces design cycle and time to market. Provides increased port density per board and system. • • • • • • • • • • • 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 CMOS-based device uses the most effective silicon economy of scale. • Meets SONET jitter requirements. • Features low jitter: 3 mUIrms 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 16 Network Interface Processor BCM8211 155.52 Mbps 2.488 Gbps BCM8211 OTX ORX 155.52 Mbps ORX OTX 16 16 Network Interface Processor OVERVIEW RESETB CLK16IP CLK16IN FIFO Control Write Pointer OVFB Input Register 16:1 Parallelto-Serial DI0 FIFO 16 x 5 Output Retime TXDP TXDN DI15 CKSEL RTSYNC REF155EN B Read Pointer M U X F TXCKP TXCKN A REFCKP REFCKN DOSQ RCK16SQ M U X B F D TCK16OP Divide-by-16 2.488-GHz PLL C E TCK16ON TXLKDT Output Register RDINP0 1:16 Serialto-Parallel RDINN0 RDINP1 RDINN1 SELRD1 CLKPMODE DATPMODE LOSIB LP BKFB TSEL LPBKSB D M U X DO0 E DO15 D CDR E C A Divide-by-16 RCK16OP RCK16ON RXLKDT Loopback Logic Loss Detect LOSB 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. 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. 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. 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: info@broadcom.com Web: www.broadcom.com