SYNCHRONOUS EQUIPMENT

CLOCK/SYNCHRONIZER - SY02-PLL2

RALTRON ELECTRONICS CORP.

!!!! 10651 N.W.19

Tel: 305 593-6033

!!!! Fax: 305-594-3973 !!!! e-mail: sales@raltron.com !!!! Internet: http://www.raltron.com

The SY02-PLL2 is a Phase Lock Loop has been designed as a module level subsystem for easy incorporation into

telecommunication equipment. The module generates the output from a low jitter VCXO and provides recovered

signal as secondary output. The SY02-PLL2 has two reference inputs with frequencies that can be selected by user

from 8 to 77.76MHz. The input reference selection pin (CNT) selects which reference will be used. The loop

bandwidth is optimized according to used VCXO and wanted output performance. The ALARM output signal

monitors the status of the phase loop in case of Loss of Lock (LOL) and Loss of Reference (LOR) both internal

signals. The two control inputs provides module to go into free-run regardless of the reference (FREE_RUN) and to

the tri-state high impedance output (OUT EN). The SMD package dimensions are 19.4 x 20.3 mm and power supply

is 3.3V.

- INPUT REFERENCE SELECTION

CNT

Reference selected

0

REF A

1

REF B

- OUTPUT PROGRAMMING

EN OUT

FREE-RUN

FRS output

OUTPUT

0

0

0

Locked to Reference

1

X

0

Hi-Z Tri-State

0

1

1

Free-Run

- ALARM STATES

LOL

LOR

ALARM

0

0

0 -No alarm

1

0

1- Loss of Lock

0

1

1-Loss of Reference

MUX,

FPD,

Counters

&

Logic

LOOP

FILTER

VCXO

REFB

REFA

CNT

ALARM

REF OUT

J-TAG PORT

OUT

EN OUT

FREE-RUN

FRS