描述 Description

The SY87721L is a complete Clock Recovery and Data retiming integrated circuit for data rates from 28Mbps up to 2.7Gbps NRZ including SONET FEC data rates. Included in the device, is a fully integrated Clock Multiplier Unit (CMU) that is capable of generating frequencies that cover the same data rate range as the CDR. The device is ideally suited for SONET/SDH/ATM, Fibre Channel, and Gigabit Ethernet applications, as well as other high-speed data transmission applications.Clock recovery and data retiming is performed by synchronizing the on-chip VCO directly to the incoming data stream. The VCO center frequency is controlled by the reference clock frequency and the selected divide ratio. On-chip clock generation is performed through the use of a frequency multiplier PLL with a byte rate or code group rate source as reference.

特性 Features

·Recovers any data and clock from 28Mbps to 2.7Gbps
·OC-1, OC-3, OC-12, OC-48, ATM
·Gigabit Ethernet, Fast Ethernet
·Fibre Channel, 2x Fibre Channel
·P1394, Infiniband
·SMPTE-259, SMPTE-292
·Proprietary optical transport
·Integrated clock multiplier unit with low jitter generation
·Complies with Bellcore, ITU/CCITT and ANSI specifications
·Selectable mux for pass through; avoids jitter accumulation when switching through backplanes
·Available in 64-Pin ePad-TQFP package

簡介

SY87721L屬于集成電路（IC）的應(yīng)用特定時鐘/定時。由制造生產(chǎn)的SY87721L應(yīng)用特定時鐘/定時專用時鐘和計時 IC（集成電路）產(chǎn)品族中的產(chǎn)品主要用于執(zhí)行與時間或頻率信息生成和分配相關(guān)的各種操作，適合的設(shè)計環(huán)境較特定，例如 AMD 和 Intel 的中央處理單元 (CPU) 或圖形處理單元 (GPU)、DVD 音頻設(shè)備、藍光光盤播放器、以太網(wǎng)設(shè)備、PCIe、SATA、光纖通道接口、車載娛樂總線等。