描述 Description

The SY87729L is a complete rate independent frequency synthesizer integrated circuit. From a single reference source, this device generates a differential PECL reference frequency for Micrel's SY87721L 10Mbps to 2.7Gbps combined CDR and CMU.The SY87729L 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, SY87729L will generate exactly correct reference frequencies for common data transport protocols augmented by forward error correction codes.For proprietary applications, the SY87729L generates reference frequencies guaranteed to enable the SY87721L CDR to lock to any possible baud rate in its range. SY87729L accepts configuration via a MicroWire? interface.

特性 Features

Fractional synthesizer from 10MHz to 365MHz from a single 27MHz reference oscillator
Generates exactly the correct frequency for common transport protocols with or without FEC
Directly enables SY87721L 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

簡介

SY87729L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SY87729L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、車載娛樂總線等。