SYNCHRONOUS EQUIPMENT

CLOCK/SYNCHRONIZER - SY02-PLL

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-PLL 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. The SY02-PLL can lock to

one of four reference frequencies from 8 to 64kHz that can be selected using to external select pins. The counters,

phase detector and other logic are implemented in programmable logic. The loop bandwidth is optimized according

to used VCXO and wanted output performance. The two output signals monitor the status of the phase loop LOL

(Loss of Lock) and LOR (Loss of Reference). 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

IN-A

IN-B

REFERENCE SELECTED

0

0

8KHz (default)

1

0

16KHz

0

1

32KHz

1

1

64KHz

- OUTPUT PROGRAMMING

EN OUT

FREE-RUN

OUTPUT

0

0

Locked to Reference

1

X

Hi-Z Tri-State

0

1

Free-Run

- ALARM STATES

LOL

LOR

ALARM

0

0

No alarm

1

0

Loss of Lock

0

1

Loss of Reference

MUX,

FPD,

Counters

&

Logic

LOOP

FILTER

VCXO

IN-A

IN-B

REF IN

LOR

REF OUT

J-TAG PORT

OUT

EN OUT

FREE-RUN

LOL