SYNCHRONOUS EQUIPMENT
HIGH FREQUENCY CLOCK REGENERATOR - SY02-MFTP
ALARM
Lock Monitor
Ref 1
Ref 2
Ref 3
Ref 4
VCXO Monitor
REF IN
MUX
MUX, FPD,
Counters
&
OUT (opt., For PECL )
LOOP
FILTER
VCXO
Logic
Out
E/D
Input Freq. CNT A
Input Freq. CNT B
J-TAG PORT
SY02-MFTP
Figure 1 – Block Diagram (***Components outside the dotted line are user supplied)
•
DESCRIPTION
The SY02-MFTP 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 170MHz) output from a
low jitter VCXO (Crystal Based Oscillator. The output can be disabled externally by setting OUTEN pin high. The SY02-
MFTP can be locked to a user defined input reference signal (from 8KHz to 77.76MHz…for options please see table ).
Frequency selection could be simultaneously achieved of up to 4 independent sources while combining the module with an
external MUX. Raltron’s SY02-MFTP 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-MFTP 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
1
Module in Free-run
Module locked
ꢁ Input Reference Control select
CNT A
CNT B
Selected Option
0
0
1
1
0
1
0
1
EXT Ref 1
EXT Ref 2
EXT Ref 3
EXT Ref 4
RALTRON ELECTRONICS CORP. ꢀ10651 N.W.19th St ꢀFlorida 33172 ꢀU.S.A.
Tel: 305 593-6033 ꢀFax: 305-594-3973 ꢀe-mail: sales@raltron.com ꢀInternet: http:/www.raltron.com