BBT3421

® nLiten BBT3421 Quad Multi-rate Re-Timer Data Sheet August, 2002 FN7482 4 Channel Multi-rate Intelligent CMOS Re-Timer Features • 4 channels of clock & data recovery and retiming • Multi-Speed Operation for OC-48, InfiniBand, XAUI, 10GFC-SN4 rate - 2.488Gbps to 3.187Gbps with half-rate support • IEEE 802.3ae Compliant - 10GBASE-LX4 (WWDM) - Random jitter 2.5ps (typical) • 250mW typical power consumption per channel • 1.8V power supply with 3.3V I/O tolerant • Drive up to 40” FR-4 traces and 500 meters of MMF fiber • Single-ended or differential input reference clock - Data rate/20 for multi-rate data • Intelligent Retiming • Deskewing and Channel-to-Channel Alignment • Clock Compensation - Tx/Rx Rate Matching via IDLE Insertion/Deletion - Received Data Aligned to Local Reference Clock for Transmission - Accommodate up to ±100ppm clock frequency offset • CML Rx with Signal Detect and Programmable Transmission Medium Equalization • CML Tx with Adjustable Pre-emphasis • Long Run Length (512 bit) frequency lock ideal for proprietary encoding schemes • Extensive configuration and status reporting via 802.3 compliant MDC/MDIO serial interface • MDIO Interface Compliant with IEEE 802.3ae Clause 45 and Clause 22 Frame Formats • 10 x 10mm 144 pin 0.8mm pitch LFBGA package Applications • Intelligent Retimer required for 10Gigabit Ethernet compliance (10GBASE-LX4) • Support 10Gigabit Fibre Channel • Support OC-48 Rate • Support InfiniBand • Ideal for parallel optics Backplane Extension of up to 40 inches Benefits • Industry-leading power performance • Programmable Receiver Equalization and preemphasis increase link distance and design flexibility - Reduced EMI, cross-talk • Link distances greater than 40” FR-4 traces and two connectors • Proven Interoperability with various backplanes, optical modules and semiconductors • Ease of testing - PRBS (both 223-1 and 13458 byte) Built-In Self Tests, error code output - JTAG Boundary Scan, Support for Built-In Self Test • Complete applications collateral - Evaluation Board - Applications Note - Verilog Model; SPICE Model - High-Speed System Engineering technical support Get FULL DATASHEET Line Card nPower BBT3420 XAUI to XGMII Transceiver Backplane Optical Transponder XGMII nPower BBT3420 XAUI to XGMII Transceiver XAUI Up to 40" XGMII Custom ASIC Upper Layer & MAC Functions nPower BBT3421 XAUI to XAUI Re-Timer Optical Transceiver Switch Card XAUI Up to 40" Switch Fabric XAUI Up to 40" nPower BBT3421 XAUI to XAUI Re-Timer Other Line Cards FIGURE 1. BBT3421 APPLICATIONS 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners. BBT3421 Data Flow The BBT3421 re-timer accepts serial data from the CML pins, performs clock and data recovery on the bit stream, optionally scans the data for the “comma” patterns, ByteAligns the data on either ‘disparity’ comma pattern, and deserializes the data. The data is then fed into the receive FIFO, where clock compensation, and optional channel alignment are performed. The parallel data is then resynchronized into the Transmit FIFO using the local reference clock, serialized to this local reference clock, and sent out to the differential CML, XAUIcompatible TX pins. In addition, several other facilities are provided to ease system testing. Loop-back of the serial signals is available under external pin or MII control. Suitable control and status registers are available through the IEEE standard MDIO/MDC system. If the Built-in-Self-Test function (BIST) is in use, the serial TX data instead is derived from a PRBS 2^23 -1 pattern generator. In this BIST mode, the received serial data is checked against the PRBS pattern transmitted and, if an error is found, a flag signal is provided. Channel 3 Channel 2 Channel 1 Channel 0 IN0IN0+ Clock & Data Recovery Deserializer & Comma Detector 8B/10B Decoder Receive FIFO Receive Parallel Data 8B/10B Encoder & Mux OUT0OUT0+ R CLOCK N RCLOCK Static Clock Multiplier MDIO Controls 3.125G MDIO/MDC Register File MDC FIGURE 2. FUNCTIONAL BLOCK DIAGRAM OF BBT3421 All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 2