ACS8525T集成电路（IC）的应用特定时钟/定时规格书PDF中文资料

ACS8525T属于集成电路（IC）的应用特定时钟/定时。由升特制造生产的ACS8525T应用特定时钟/定时专用时钟和计时 IC（集成电路）产品族中的产品主要用于执行与时间或频率信息生成和分配相关的各种操作，适合的设计环境较特定，例如 AMD 和 Intel 的中央处理单元 (CPU) 或图形处理单元 (GPU)、DVD 音频设备、蓝光光盘播放器、以太网设备、PCIe、SATA、光纤通道接口、车载娱乐总线等。

描述 Description

The ACS8525 is a highly integrated, single-chip solution for “Hit-less” protection switching of SEC (SDH/SONET Equipment Clock) + Sync clock “Groups”, from Master and Slave SETS clock cards and a third (Stand-by) source, for Line Cards in a SONET or SDH Network Element. The ACS8525 has fast activity monitors on the SEC clock inputs and will implement automatic system protection switching against the Master clock failure. The selection of the Master/Slave input can be forced by a Force Fast Switch pin. If both the Master and Slave input clocks fail, the Stand-by “Group” is selected or, if no Stand-by is available, the device enters Digital Holdover mode.

特性 Features

◆ SONET/SDH applications up to OC-3/STM-1 bit rates

◆ Switches between grouped inputs (SEC/Sync pairs)

◆ Inputs: three SECs at any of 2, 4, 8 kHz (and N x 8 kHz multiples up to 155.52 MHz), plus Frame Sync/MultiFrame Sync

◆ Outputs: two SEC clocks at any of several spot frequencies from 2 kHz up to 77.76 MHz via the TTL/CMOS port and up to 311.04 MHz via the PECL/LVDS port

◆ Selectable clock I/O port technologies

◆ Modes for E3/DS3 and multiple E1/DS1 rate output clocks

◆ Frequency translation of SEC input clock to a different local line card clock

◆ Robust input clock source activity monitoring on all inputs

◆ Supports Free-run, Locked and Digital Holdover modes of operation

◆ Automatic “Hit-less” source switchover on loss of input

◆ External force fast switch between SEC1/SEC2 inputs

◆ Phase Build-out for output clock phase continuity during input switchover

◆ PLL “Locked” and “Acquisition” bandwidths individually selectable from 18, 35 or 70 Hz

◆ Serial interface for device set-up

◆ Single 3.3 V operation, 5 V I/O compatible

◆ Operating temperature (ambient) of -40 to +85°C

◆ Available in LQFP 64 package

◆ Lead (Pb)-free version available (ACS8525T), RoHS and WEEE compliant