Description

The ACS8526 is a highly integrated single-chip solution for protection switching between two SECs (SDH/SONET Equipment Clocks) from Master and Slave SETS clock cards, for line cards in a PDH, SONET or SDH Network Element. The ACS8526 has fast activity monitors on the inputs and will raise a flag on a pin if there is a loss of activity on the currently selected input. The protection switching between the input reference clock sources is controlled by an external pin.

Features

◆ Line card protection switch - partners Semtech SETS devices for Stratum 3E/3/4E/4 PDH, SONET or SDH applications

◆ High performance DPLL/APLL solution

◆ Output jitter compliant to STM-1

◆ Two independent SEC inputs ports (TTL)

◆ Four independent output ports:

◆ Two clock ports: one PECL/LVDS, one TTL

◆ Two Syncs (TTL): 8 kHz FrSync & 2 KHz MFrSync

◆ TTL I/O ports: spot frequencies 2 kHz to 77.76 MHz

◆ PECL/LVDS port: spot frequencies 2 kHz to 311 MHz

◆ N x E1/DS1 mode

◆ Programmable pulse width and polarity on Syncs

◆ SONET/SDH frequency translation

◆ Digital Holdover mode on input failure

◆ Separate activity monitors and register alarms on each input.

◆ “Loss of activity” on selected input flagged on dedicated pin

◆ Source switch under external hardware control

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

◆ Configurable via serial interface or hardware pins

◆ Output clock phase continuity to GR-1244-CORE[13]

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

◆ IEEE 1149.1 JTAG Boundary Scan is supported

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

◆ Available in LQFP 64 package

◆ Lead (Pb)-free version available (ACS8526T), RoHS and WEEE compliant.

ACS8526T属于集成电路（IC） > 应用特定时钟/定时。Semtech Corporation制造生产的ACS8526T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。