描述 Description

The ZL30138 SONET/SDH/Ethernet Stratum 2/3E/3 System Synchronizer and SETS device is a highly integrated device that provides all of the functionality that is required for a central timing card in carrier grade network equipment. The basic functions of a central timing card include:
? Input reference monitoring for both frequency accuracy and phase irregularities
? Automatic input reference selection
? Support of both external timing and line timing modes
? Hitless reference switching
? Wander and jitter filtering
? Optional Input phase transient filtering (Stratum 3E phase build-out)
? Master/slave crossover for minimizing phase alignment between redundant timing cards
? Independent derived output timing path for support of the SETS functionalityClick here for secure documentation

特性 Features

Typical Applications
? ITU-T G.8262 System Timing Cards which support 1 GbE and 10 GbE interfaces
? Telcordia GR-253 Carrier Grade SONET/SDH Stratum 2/3E/3 System Timing Cards
? System Timing Cards which supports ITU-T G.781 SETS (SDH Equipment Timing Source)
Features & Benefits
? Supports the requirements of ITU-T G.8262 for synchronous Ethernet Equipment slave Clocks (EEC option 1 and 2)
? Supports the requirements of Telcordia GR-1244 Stratum 2/3/3E and GR-253, ITU-T G.812, G.813, and G.781 SETS
? Synchronizes to telecom reference clocks (2 kHz, N*8 kHz up to 77.76 MHz, 155.52 MHz) or to Ethernet reference clocks (25 MHz, 50 MHz, 62.5 MHz, 125 MHz)
? Generates standard SONET/SDH clock rates (e.g. 19.44 MHz, 38.88 MHz, 77.76 MHz, 155.52 MHz, 622.08 MHz) or Ethernet clock rates (e.g. 25 MHz, 50 MHz, 125 MHz, 156.25 MHz, 312.5 MHz) for synchronizing Gigabit Ethernet PHYs
? Programmable output synthesizers (P0, P1) generate telecom clock frequencies from any multiple of 8 kHz up to 100 MHz

簡(jiǎn)介

ZL30138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ZL30138應(yīng)用特定時(shí)鐘/定時(shí)專(zhuān)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(pán)播放器、以太網(wǎng)設(shè)備、PCIe、SATA、光纖通道接口、車(chē)載娛樂(lè)總線(xiàn)等。