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ACS8515T

更新时间： 2024-02-28 02:00:44

品牌	Logo	应用领域
商升特 - SEMTECH		开关
页数	文件大小	规格书
50页	455K
描述
Support Circuit, 1-Func, PQFP64, ROHS COMPLIANT, PLASTIC, LQFP-64

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ACS8515T 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QFP
包装说明：	LFQFP,	针数：	64
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.8	Is Samacsys：	N
JESD-30 代码：	S-PQFP-G64	JESD-609代码：	e0
长度：	10 mm	湿度敏感等级：	3
功能数量：	1	端子数量：	64
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	LFQFP
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	240	认证状态：	Not Qualified
座面最大高度：	1.6 mm	标称供电电压：	3.3 V
表面贴装：	YES	电信集成电路类型：	ATM/SONET/SDH SUPPORT CIRCUIT
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	10 mm	Base Number Matches：	1

ACS8515T 数据手册

ACS8515 Rev2.1 LC/P

Line Card Protection Switch

for SONET or SDH Network Elements

FINAL

ADVANCED COMMUNICATIONS

Description

Features

The ACS8515 is a highly integrated, single-chip •Suitable for Stratum 3, 4E and 4 SONET

solution for ‘hit-less’ protection switching of SEC or SDH Equipment Clock (SEC) applications

clocks from Master and Slave SETS clockcards •Meets AT&T, ITU-T, ETSI and Telcordia

in a SONET or SDH Network Element. The specifications

ACS8515 has fast activity monitors on the in- •Three SEC input clocks, from 2 kHz to

puts and will implement automatic system pro-

tection switching against master clock failure.

155.52 MHz

•Generates two SEC output clocks, up to

311.04 MHz

•Frequency translation of SEC input clock to a

different local line card clock

•Robust input clock source frequency and

activity monitoring on all inputs

A further input is provided for an optional standby

SEC clock. The ACS8515 is fully compliant with

the required specifications and standards.

The ACS8515 can perform frequency translation

from a SEC input clock distributed along a back

plane to a different local line card clock, e.g.

•Supports Free-run, Locked and Holdover

modes of operation

•Automatic ‘hit-less’ source switchover on loss

of input

8 kHz distributed on the back plane and

19.44 MHz generated on the line cards.

•External force fast switch between SEC inputs

•Phase build out for output clock phase

continuity during input switchover

•SPI⁽¹⁾compatible serial microprocessor interface

•Programmable wander and jitter tracking

attenuation 0.1 Hz to 20 Hz

•Single +3.3 V operation. +5 V I/O compatible

•Operating temperature (ambient) -40°C to

+85°C

An SPI⁽¹⁾compatible serial port is incorporated,

providing access to the configuration and status

registers for device setup.

The ACS8515 can utilise either a low cost XO

oscillator module, or a TCXO with full tempera-

ture calibration - as required by the application.

Rev2.1 adds choice of edge alignment for 8kHz

input, as well as a low jitter n x E1/DS1 output

mode. Other minor changes are made, with all

described in Appendix A.

•Available in 64 pin LQFP package

•Lead (pb)-free version available (ACS8515

Rev2.1T) RoHS and WEEE compliant.

Block Diagram

(1) SPI is a trademark of Motorola Corporation

Figure 1. Simple Block Diagram

3 x SEC Input

Master/Slave

3xSEC

2xSEC

+ Standby:

N x 8kHz

1.544/2.048MHz

Input

Ports

Output

APLL

Ports

Frequency

6.48MHz

DPLL

Frequency Synthesis

19.44MHz

38.88MHz

51.84MHz

77.76MHz

155.52MHz

MFrSync

Monitors

Dividers

FrSync

MFrSync

Chip Clock

Generator

Set

SPI Compatible Serial

Microprocessor Port

Priority

Table

TCXO or XO

Revision 2.01/December 2005 Semtech Corp.

www.semtech.com

12 3 4 5 6 7...50

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