ACS8522A Semtech Corporation, ACS8522A Datasheet

ACS8522A

Manufacturer Part Number

ACS8522A

Description

Synchronous Equipment Timing Source for Stratum 3/4e/4 and SMC Systems

Manufacturer

Semtech Corporation

Datasheet

1.ACS8522A.pdf (118 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ACS8522A

Manufacturer:

SEMTECH/美国升特

Quantity:

20 000

Current page: 1 of 118
Download datasheet (844Kb)

The ACS8522 is a highly integrated, single-chip solution

for the Synchronous Equipment Timing Source (SETS)

function in a SONET or SDH Network Element. The device

generates SONET or SDH Equipment Clocks (SEC) and

Frame Synchronization clocks. The ACS8522 is fully

compliant with the required international specifications

and standards.

The device supports Free-run, Locked and Holdover

modes, with mode selection controlled either

automatically by an internal state machine or forced by

The ACS8522 accepts up to four independent input SEC

reference clock sources from Recovered Line Clock, PDH

network, and Node Synchronization. The ACS8522

generates independent SEC and BITS clocks, an 8 kHz

Frame Synchronization clock and a 2 kHz Multi-Frame

Synchronization clock, both with programmable pulse

width and polarity.

The ACS8522 includes a Serial Port, which can be SPI

compatible, providing access to the configuration and

status registers for device setup.

The ACS8522 supports IEEE 1149.1

scan.

The User can choose between OCXO or TCXO to define the

Stratum and/or Holdover performance required.

Figure 1 Block Diagram of the ACS8522 SETS LITE

Revision 5/November 2006 © Semtech Corp.

Description

ADVANCED COMMUNICATIONS

Block Diagram

Inputs: 4 x TTL

Programmable;

2 kHz

4 kHz

N x 8 kHz

1.544/2.048 MHz

6.48 MHz

19.44 MHz

25.92 MHz

38.88 MHz

51.84 MHz

77.76 MHz

ADVANCED COMMUNICATIONS

TRST

TMS

TDO

TCK

TDI

Selection

Monitors

1149.1

4 x SEC

Control

JTAG

IEEE

Input

and

Port

Generator

OCXO or

T4 DPLL

Selector

T0 DPLL

Selector

Clock

TCXO

Chip

Divider, 1/n

n = 1 to 2

Priority

T4 DPLL/Freq. Synthesis

T0 DPLL/Freq. Synthesis

[5]

Optional

Table

JTAG boundary

PFD

Digital

FINAL

Filter

Loop

Page 1

Serial

Port

Features

Synchronous Equipment Timing Source for

DTO

Suitable for Stratum 3, 4E, 4 and SONET Minimum

Clock (SMC) or SONET/SDH Equipment Clock (SEC)

applications (to Telcordia 1244-CORE

and GR-253

specifications)

Accepts four individual input reference clocks, all with

robust input clock source quality monitoring

Simultaneously generates four output clocks, plus two

Sync pulse outputs

Absolute Holdover accuracy better than 3 x 10

(manual), 7.5 x 10

stability defined by choice of external XO

Programmable PLL bandwidth, for wander and jitter

tracking/attenuation, 0.1 Hz to 70 Hz in 10 steps

Automatic hit-less source switchover on loss of input

Serial SPI compatible interface

Output phase adjustment in 6 ps steps up to ±200 ns

IEEE 1149.1

Available in LQFP 64-pin package

Single 3.3 V operation. 5 V tolerant

Lead (Pb)-free version available (ACS8522T), RoHS

and WEEE compliant.

Stratum 3/4E/4 and SMC Systems

T0 Feedback

Frequency

T0 Output

T4 Output

[17]

Dividers

[5]

APLL

, and ITU-T G.813

JTAG Boundary Scan

ACS8522 SETS LITE

-14

(instantaneous); Holdover

Output

Ports

FrSync

MFrSync

F8522P_001BLOCKDIA_04

[11]

Output O1: PECL/LVDS

Outputs O2 - 04: TTL

Programmable;

E1/DS1 (2.048/

1.544 MHz)

and frequency

multiples:

1.5 x, 2 x, 3 x

4 x, 6 x, 12 x

16 x and 24 x

E3/DS3

2 kHz

8 kHz

and OC-N* rates

8 kHz

(FrSync)

2 kHz

(MFrSync)

OC-N* rates =

OC-1 51.84 MHz

OC-3 155.52 MHz

and derivatives:

6.48 MHz

19.44 MHz

25.92 MHz

38.88 MHz

51.84 MHz

77.76 MHz

155.52 MHz

311.04 MHz

Options Ι and ΙΙ

[19]

DATASHEET

www.semtech.com

Stratum 3

-10

Related parts for ACS8522A

Related keywords

ACS8522A datasheet
ACS8522A data sheet
ACS8522A pdf datasheet
ACS8522A component
ACS8522A part
ACS8522A distributor
ACS8522A RoHS
ACS8522A datasheet download