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Supports AT&T TR62411 and Bellcore GR-1244-

CORE, Stratum 4 Enhanced and Stratum 4 timing

for DS1 interfaces

Supports ETSI ETS 300 011, TBR 4, TBR 12 and

TBR 13 timing for E1 interfaces

Selectable 19.44 MHz, 1.544 MHz, 2.048 MHz or

8kHz input reference signals

Provides C1.5, C2, C4, C6, C8, C16, and C19

(STS-3/OC3 clock divided by 8) output clock

signals

Provides 5 styles of 8 KHz framing pulses

Holdover frequency accuracy of 0.2 PPM

Holdover indication

Attenuates wander from 1.9 Hz

Fast lock mode

Provides Time Interval Error (TIE) correction

Accepts reference inputs from two independent

sources

JTAG Boundary Scan

OSCi

OSCo

TCLR

April 2004

Ordering Information

MT9046AN 48 pin SSOP

-40擄C to +85擄C

鈥?/div>

Applications

鈥?/div>

Synchronization and timing control for Customer

Premises Equipment (CPE)

ST-BUS clock and frame pulse sources

鈥?/div>

Description

The MT9046 T1/E1 System Synchronizer contains a

digital phase-locked loop (DPLL), which provides timing

and synchronization signals for multitrunk T1 and E1

primary rate transmission links. The device has

reference switching and frequency holdover capabilities

to help maintain connectivity during temporary

synchronization interruptions.

LOCK

VDD

VSS

Master Clock

TCK

TDI

TMS

TRST

TDO

PRI

SEC

IEEE

1149.1a

TIE

Corrector

Circuit

Virtual

Reference

DPLL

Output

Interface

Circuit

Reference

Select

MUX

Selected

Reference

TIE

Corrector

Enable

Reference

Select

State

Select

Input

Impairment

Monitor

State

Select

C19o

C1.5o

C2o

C4o

C6o

C8o

C16o

F0o

F8o

F16o

RSP

TSP

RSEL

Control State Machine

Feedback

Frequency

Select

MUX

MS1 MS2

RST

HOLDOVER PCCi FLOCK

FS1

FS2

Figure 1 - Functional Block Diagram

Zarlink Semiconductor US Patent No. 5,602,884, UK Patent No. 0772912,

France Brevete S.G.D.G. 0772912; Germany DBP No. 69502724.7-08

1

Zarlink Semiconductor Inc.

Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.

型號(hào)

版本

描述

廠商

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MT9046 Datasheet

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