SYNCHRONOUS EQUIPMENT
HITLESS SWITCHING - SY0005
SY0005
Date: November 15, 2000
PRELIMINARY
•
INTRODUCTION
The SY0005 is a high frequency clock that has been designed to be use at high speed Line Interface Cards in
telecommunication products mainly related to STN-n or OC-n. The SY0005 is a synchronization solution for timing
and jitter topics specified within ITU-T Recommendations G.813, ETSI -ETS 300 462-4, and Bellcore GR-1244-
CORE.
•
FEATURES
A high frequency clock intended to be used at line cards for OC3 and OC12 (STM3 and STM12).
Along with SY0001 or SY0005 provides complete timing solution.
Provides very low jitter output signal.
Performs hitless switching between two reference signals.
Supports four timing modes: (1) Free-run, (2) Locked to Reference 1 (3) Locked to Reference 2, and (4)
Loopback timing.
Accepts reference inputs from two clock sources – 19.44MHz.
Manual or Automatic selection between operating modes.
Alarm and status signals.
Complies with ITU-T Recommendations G.813, ETSI-ETS 300 462-4 and Bellcore GR-1244-CORE for
Stratum 3 and 3E applications.
Small dimensions of 2.0 x 2.0 x 0.50 inch.
•
APPLICATION
The SY0005 high frequency clock can be used in ATM, SDH, PDH, and SONET networks devices. It is designed
for manufacturers of network equipment, especially Access Switches, Core Switches, Cross Connects, Digital
Multiplexers-Exchangers, and SDH/SONET equipment. The SY0005 is a timing solution for Line Interface Cards.
RALTRON ELECTRONICS CORP.
§
10651 N.W.19 St
§
Florida 33172
§
U.S.A.
Tel: 305 593-6033
§
Fax: 305-594-3973
§
e-mail: sales@raltron.com
§
Internet: http://www.raltron.com
th
SYNCHRONOUS EQUIPMENT
HITLESS SWITCHING - SY0005
STATUS STATUS
SIGNALS SIGNALS
CU#1
CU#2
EX REF1
EX REF2
TLB REF
AUTO/MAN
REV/NONREV
MUX,
COUNTERS
&
CONTROL
LOGIC
PLL
(PD+
LF)
VCXO
OUT
PECL
CNT1 CNT2
ALARM &
STATUS
÷
OPT OUT
PECL
Figure 1. - The functional block diagram of SY0005
•
DESCRIPTION
The SY0005 synchronization module is a high frequency PLL that performs hitless switching plus additional
features necessary for timing at high-speed Line Interface Cards. The functional block diagram is shown in figure
1. The SY0005 receives two reference signals, usually 19.44MHz and using PLL synthesizer generates a high
frequency signal necessary for transceivers or framers. The PLL that is complemented by high-speed logic that
provide processing, switching between the timing modes, alarm and status messages and etc. A high quality
VCXO provides very low jitter at the output. The additional output is provided using a divider.
The module supports two operating modes: AUTO mode is the mode where all switching are done automatically
and MANUAL mode is where unit will switch according to the two external control pins CON1 and CON2.
CON1
0
1
0
1
CON2
0
0
1
1
Operational mode
Free-run (Unlocked)
Locked to EX REF 1
Locked to EX REF 2
Locked to TLB REF
The module operates in the following four timing modes: 1) Free-run, 2) Locked to EX REF1, 3) Locked to EX
REF2 and 4) Locked to TBL REF. Free-run it a mode the unit is unlocked to either of the inputs. The accuracy of
the output frequencies in this mode is equal to the accuracy of free running VCXO. Locked to EX REF 1 is the
mode where the output of the module is phase locked to input reference 1. Locked to EX REF 2 is the mode where
the output of the module is phase locked to input reference 2, Locked to TBL REF is the mode where is the output
of the module is phase locked to the signal used in Time Loop-back operation.
RALTRON ELECTRONICS CORP.
§
10651 N.W.19 St
§
Florida 33172
§
U.S.A.
Tel: 305 593-6033
§
Fax: 305-594-3973
§
e-mail: sales@raltron.com
§
Internet: http://www.raltron.com
th
SYNCHRONOUS EQUIPMENT
HITLESS SWITCHING - SY0005
•
SPECIFICATIONS
2” (D) x 2” (W) x 0.50” (H)
1.95” (D) x 1.95” (W) x 0.5” (H)
1.95” (D) x 1.95” (W) x 0.45” (H)
+3.3VDC
TBD
-20°C to 70°C
-40° to 85°C
5% to 95% non-condensing
VCXO
2
19.44MHz
HCMOS/TTL Compatible
2
155.52MHz
PECL
Hermetically Sealed Metal box
Metal Box
Module on PCB
General Specifications
Mechanical
Power Supply
Current Supply
Operating Temperature
Storage Temperature
Humidity
Internal Oscillators
Number of Inputs
Input reference frequency
Signal Level
Time Reference characteristics
Number of Outputs
Output 1
Output 2
Signal Level
Jitter Tolerance
Phase Transient Tolerance
Wander Tolerance
Jitter Generation and Transfer
SAW oscillators
Input Signals
As output of SY0001/SY0004
622.08MHz optional
Derivative of OUT1
Depend of the frequency output
Bellcore: GR-1244-core 4.2, ITU-T: G.812
Bellcore: GR-1244-core 4.4
Bellcore: GR-1244-core 4.3, ITU-T: G.812
Bellcore: GR-1244-core 5.5, ITU-T: G.812
±20ppm
±50ppm
Bellcore: GR-1244-core 4.2, ITU-T: G.812
Bellcore: GR-1244-core 4.2, ITU-T: G.812
Output Signal
Signal Quality
Performance
Frequency Output
Performance
Free run accuracy
Pull-In Range
MTIE
TDEV
RALTRON ELECTRONICS CORP.
§
10651 N.W.19 St
§
Florida 33172
§
U.S.A.
Tel: 305 593-6033
§
Fax: 305-594-3973
§
e-mail: sales@raltron.com
§
Internet: http://www.raltron.com
th
SYNCHRONOUS EQUIPMENT
HITLESS SWITCHING - SY0005
•
PIN ASSIGNMENT
On the picture below it is shown the pin-out for the SY0005. For other pin-out requirement please contact the
Raltron.
GND
TLB OK
TLB REF COMP
TLB REF
GND
REF1 FR
REF2 FR
REF1 AL
REV/NONREV
GND
OUT
OUT COMP
AUTO/MAN
ALARM
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Vcc
REF1 UL
GND
EX REF 1
REF2 UL
GND
CNT 1
CNT 2
EX REF2
OPT OUT COMP
OPT OUT
REF1 HL
REF2 HL
REF2 AL
Figure 3 – Bottom view
Pin #
2
5
21
14
12
13
23
22
16
20
7
8
15
3,6,19,24,28
1
17
18
11
10
4
9
25
26
27
Description
Reference 1 Unlocked Input -> the signal PLL UNLOCK comes from Clock Unit 1
Reference 2 Unlocked Input -> the signal PLL UNLOCK comes from Clock Unit 2
Reference 1 Alarm Input -> the signal ALARM OUT comes from Clock Unit 1
Reference 2 Alarm Input -> the signal ALARM OUT comes from Clock Unit 2
Reference 1 Holdover Input -> the signal HOLDOVER comes from Clock Unit 1
Reference 2 Holdover Input -> the signal HOLDOVER comes from Clock Unit 2
Reference 1 Freerun Input -> the signal FREERUN comes from Clock Unit 1
Reference 2 Freerun Input -> the signal FREERUN comes from Clock Unit 2
Auto/Manual configuration input -> selection input for operating mode
Revert / Non revert input-> selection input for revert feature
Control Input 1 -> the external input for selecting mode of the unit – see table.
Control Input 2 -> the external input for selecting mode of the unit – see table.
Alarm signal -> the output is high when there is an alarm in the module
Ground
Positive Voltage Supply
Synchronized Output -> the output of the synchronized signal.
Synchronized Complementary Output -> the output of the synchronized signal.
Optional Output -> the secondary output of the synchronized signal, for frequency
OPT OUT
range see table below.
OPT OUT
Optional Output -> the secondary output of the synchronized signal, for frequency
COMP
range see table below
EX REF 1
External Reference 1 Input -> the input signal from reference 1
EX REF 2
External Reference 2 Input -> the input signal from reference 2
TLB REF
Time Loopback Reference Input -> the input from time loopback reference
TLB REF COMP
Time Loopback Reference Complementary Input -> the input from time loopback
TLB OK
Time Loopback OK -> The reference is valid for use.
For other pin-out configurations contact the factory!
Name
REF1 UL
REF2 UL
REF1 AL
REF2 AL
REF1 HL
REF2 HL
REF1 FR
REF2 FR
AUTO/MAN
REV/NONREV
CNT 1
CNT 2
ALARM
GND
+Vcc
OUT
OUT COMP
RALTRON ELECTRONICS CORP.
§
10651 N.W.19 St
§
Florida 33172
§
U.S.A.
Tel: 305 593-6033
§
Fax: 305-594-3973
§
e-mail: sales@raltron.com
§
Internet: http://www.raltron.com
th
SYNCHRONOUS EQUIPMENT
HITLESS SWITCHING - SY0005
•
ORDERING INFORMATION
SY0005
- [Input Reference Frequencies] - [Output 1] - [Output2] - [Packaging]
19.44
77.76
-> 19.44MHz
-> 77.76MHz
155
622
-> 155.52MHz
-> 602.08MHz
19.44
38.88
77.76
-
-> 19.44MHz
-> 38.88MHz
-> 77.76MHz
No out
H
M
-
Hermetically Sealed
Metal Box
Module at PCB (def)
For other frequencies contact the factory!
Example: SY0005-19.44-155.52-19.44
•
MECHANICAL DIMENSIONS
Figure 4 – The mechanical dimensions.
Figure 4 shows the mechanical dimension of the SY0005 module. The module can be supplied in three different
types of packaging:
ü
Hermetically sealed metal box
ü
Metal box
ü
Module without packaging
The dimensions shown on the picture are valid for first and second type of packaging, the actual dimensions for
the third type are 1.95 x 1.95 x 0.45” keeping the pin-out dimensions the same for all of three. The label on the
module shows part number, factory name, week and year of production.
RALTRON ELECTRONICS CORP.
§
10651 N.W.19 St
§
Florida 33172
§
U.S.A.
Tel: 305 593-6033
§
Fax: 305-594-3973
§
e-mail: sales@raltron.com
§
Internet: http://www.raltron.com
th
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