描述 Description

The SY87739L is a complete rate independent frequency synthesizer integrated circuit. From a single reference source, this device generates a differential PECL output frequency from 10MHz up to 729MHz.The SY87739L generates an exactly correct reference frequency for common data transport protocols. This is especially important in transponder applications, where a standards compliant protocol data unit must be generated downstream, even in the absence of any signal from the associated upstream interface. In addition, the SY87739L will generate exactly correct reference frequencies for common data transport protocols augmented by forward error correction codes. The SY87739L accepts configuration via a MicroWire? interface.For proprietary applications, the SY87739L generates reference frequencies guaranteed to enable the SY87721L CDR to lock to any possible baud rate from 28Mbps to 2.7Gbps.

特性 Features

·Protocol transparent fractional-N synthesizer from 10MHz to 729MHz from a single 27MHz reference oscillator
·Generates exactly the correct frequency for common transport protocols with or without FEC
·Directly enables SY87721L CDR to lock onto any data rate within its range
·Exceeds BellCore and ITU jitter generation specifications
·Programmable via MicroWire? interface
·Available in 32-Pin EPAD-TQFP package
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簡(jiǎn)介

SY87739L屬于集成電路（IC）的應(yīng)用特定時(shí)鐘/定時(shí)。由制造生產(chǎn)的SY87739L應(yīng)用特定時(shí)鐘/定時(shí)專用時(shí)鐘和計(jì)時(shí) IC（集成電路）產(chǎn)品族中的產(chǎn)品主要用于執(zhí)行與時(shí)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(jì)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(lán)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(lè)總線等。