SYNCHRONOUS EQUIPMENT

HIGH FREQUENCY CLOCK REGENERATOR - SY02-FEC

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

Figure 1 – Block Diagram (***Components outside the dotted line are user supplied)

.

The SY02-FEC is a High Frequency Phase Lock Loop has been designed as a module level subsystem for easy

incorporation into telecommunication equipment. The module generates the high frequency (up to 800MHz) output

from a low jitter VCXO (Crystal Based Oscillator) or VCSO (SAW based oscillators). The output can be disabled

externally by setting OUTEN pin high. The SY02-FEC can be locked to a user defined input reference/s signal/s

(from 1.024MHz to 800MHz…for options please see table ). Raltron’s SY02-FEC device could be used as a

frequency translator in PLL circuits or frequency re-generator device in cases where jitter cleaning and filtering is

required. The module has a fast locking time and tolerates reference inputs with different duty cycles. The loop

bandwidth is optimized in accordance with the VCXO used and required output performance. The ALARM output

signals monitor the status of the phase lock loop and indicates LOLD (Loss of Lock Detect). If the reference REF IN

is absent, the SY02-FEC will automatically switch to free run mode and LOLD will show “0” logic level. The SMD

package dimensions are 0.80”x1.00” inch and powered by a supply of 3.3V.

ALARM STATES

LOL

D

ALARM

0

Module in Free-run

1

Module locked

Input Reference Control select

CNT

Selected Option

0

Regenerated 622.08MHz into 622.08MHz

1

Translates 666.5143MHz into 622.08MHz

MUX,

FPD,

Counters

&

Logic

LOOP

FILTER

VCXO

REF

IN

Q

OUT

J-TAG PORT

OUT

ALARM

REF

IN

Q

Input Freq. Sel

VCXO Monitor

Lock Monitor

A=622.08MHz

B= 666.513MHz

SY02-FEC

E/D