SCG2000i
Synchronous Clock
Generators
PLL
2111 Comprehensive Drive
Aurora, Illinois 60505
Phone: 630- 851- 4722
Fax: 630- 851- 5040
www.conwin.com
Bulletin
Page
Revision
Date
Issued By
SG048
1 of 16
P02
28 Oct 02
MBATTS
Application
Features
The Connor-Winfield SCG2000i provides
high precision phase lock loop frequency
translation for the telecommunication
applications that require a temperature
range of -40°C to 85°C.
SCG2000i is well suited for use in line
cards, service termination cards and
similar functions to provide reliable
reference, phase locked, synchronization
and low phase gain for TDM, PDH, SONET
and SDH network equipment. The
SCG2000i provides a jitter filtered, wander
following output signal synchronized to a
superior Stratum or peer input reference
signal.
• Industrial
Temperature
Range
• 3.3V High
Precision PLL
• Tri-State Capability
• Active Alarms
• Guaranteed Free
Run (20ppm for
19.44MHz output
and 30ppm for
125.0 MHz)
• 1 Sec. Acquisition
Time
General Description
with the 19.44 MHz model and 30 ppm accurate output with
the 125.0 MHz model. Additionally the Free Run mode may
be entered manually by asserting a high signal to the Free
Run Enable pin. The outputs, except the oscillator output,
may be put into the tri-state high impedance condition for
external testing purposes by asserting a high signal to the
Tri-State Enable pin.
The SCG2000i is 3.3 Volt components that typically
draw less than 100 mA. All models have an acquisition
time of approximately 1.0 second and can be used in
applications that require temperature rating of -40° to
85° C. All models have a 33Ω resistor in series with the
oscillator output. The SCG2000i maximum package
dimensions are .78” x .83” x .35” on a six layer FR4 board
with surface mount pins. Parts are assembled using high
temperature solder to withstand surface mount reflow
process.
The SCG2000i provides high precision phase lock loop
frequency translation for the telecommunication applications. The
SCG2000i generates a CMOS output from an intrinsically low
jitter, voltage controlled crystal oscillator. while providing a jitter
attenuated, internal reference that is connected to a Reference
Output pin.
SCG2000i is well suited for use in line cards, service
termination cards and similar functions to provide reliable
reference, phase locked, synchronization for TDM, PDH, SONET
and SDH network equipment . The SCG2000i provides a low
phase gain (<0.2dB), jitter filtered, wander following output signal
synchronized to a superior Stratum or peer input reference
signal.
The SCG2000i include the following features: Free Run, Tristate and alarm outputs for Loss-of-Reference, (LOR), Loss-ofLock, (LOL). During the LOR alarm, the SCG2000i will also enter
a Free Run state which will guarantee a 20 ppm accurate output
Functional Block Diagram
Figure 1
Tri-State Enable
(Pin 10)
LOL Alarm Output
(Pin 7)
ALARM
DETECTION
LOR Alarm Output
(Pin 6)
Free Run Enable
(Pin 5)
Reference Input
(Pin 8)
DIVIDER
DPFD
ANALOG
FILTER
FREE RUN
CONTROL
Oscillator Output
(Pin 9)
VCXO
Optional Oscillator Output
(Pin 1)
DIVIDER
Reference Output
(Pin 1)
(Not available on
models with optional
oscillator output)
Input Freq. Select A
(Pin 14)
Input Freq. Select B
(Pin 13)
Model Comparison Table
Table 1
Input
Ref Freq
Max
Duty
Cycle
Reference Output
(Pin #1)
Oscillator Output
(Pin #9)
Notes
SCG2000
8-64 kHz
40/60
= Input Ref Freq.
1.544 MHz to 125.0 MHz
Basic Model
SCG2000i
8-16 kHz
45/55
= Input Ref Freq.
19.44 MHZ, 125.0 MHz
Industrial Temp. Range
SCG2010
19.44 MHz
40/60
8 kHz
19.44 MHz
SCG2020
19.44 MHz
40/60
19.44 MHz
77.76 MHz
SCG2030
8-64 kHz
45/55
= Input Ref Freq.
1.544 MHz to 125.0 MHz
SCG2050
8-64 kHz
40/60
19.44 MHz
77.76 MHz
SCG2070
19.44 MHz
40/60
51.84 MHz, 77.76 MHz
51.84 MHz, 77.76 MHz
Model
Tight Duty Cycle
Ref Output = Osc Output
*Features which differentiate a model from the base model (SCG2000) are highlighted in boldface color and in the notes column.
Data Sheet #: SG048
Page 2 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Pin Description
Table 2
Pin #
1
Connection
Description
Reference Output
Output frequency is dependent on SCG model
2
TCK
JTAG pin that is used only by Connor-Winfield for programming. Do not connect
3
TMS
JTAG pin that is used only by Connor-Winfield for programming. Do not connect
4
Ground
Ground
5
Free Run Enable/TDI
Free Run enable pin. 1 = Free Run. Input is pulled to GND
6
Loss of Reference (LOR)
Alarm indicator. 1 = The reference has been lost.
7
Loss of Lock (LOL)
Alarm indicator. 1 = Phase lock has been lost
8
Reference Input
Input reference frequency
9
Oscillator Output
Output frequency is dependent on SCG model
10
Tri-State enable
Tri State control for all outputs except Oscillator Output. 1 = Hi-Z, 0 = normal.
Input is pulled to GND.
11
Vcc
3.3V Supply Voltage.
12
TDO
JTAG pin that is used only by Connor-Winfield for programming. Do not connect
13
Input Freq. Select B
Control pin B used to select input frequency. Input is pulled to GND.
14
Input Freq. Select A
Control pin A used to select input frequency. Input is pulled to GND.
Typical Application
Figure 2
BITS
System
Signal
Input Select
Line Card 1
Timing Card #1
S
A
B
CW's SCG
2000/4000
MUX
A
Y
MUX
B
CW's STM/MSTM module
Y
S
Clock out
RCV
Line Card #N
Timing Card #N
S
A
A
B
MUX
Y
MUX
CW's STM/MSTM module
B
Y
CW's SCG
2000/4000
Clock out
RCV
S
System Select
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 3 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
Absolute Maximum Rating
Table 3
Symbol
Parameter
Minimum
Nominal
Maximum
Units
Vcc
Power Supply Voltage
-0.5
4
Volts
V1
Input Voltage
-0.5
5.5
Volts
Ts
Storage Temperature
-65
150
deg. C
Notes
Specifications
Table 4
Parameter
Specifications
Notes
Voltage
3.3V ±5%
1.0
Current
100 mA Typical
Temperature Range
-40° to 85°C
Input Jitter Tolerance
≥31.25us Typical
(Input Jitter Frequencies > 10 Hz)
Jitter Bandwidth
<15 Hz (8 Hz Typical)
Acquisition Time
Approx 1.0 second
Capture/Pull-in Range
±32 ppm Minimum
Output Duty Cycle
40/60 % Min/Max @ 50% Level
Output Rise and Fall Time
3 ns @ 20% to 80% output level
Output Load
30 pF
2.0
Alarms
LOR, LOL Status on seperate outputs
Free Run Accuracy
±20 ppm (19.44 MHz output)
±30 ppm (125.0 MHz output)
Package
Fr4 SM 0.78" x .83" x 0.35" (maximum)
TDEV
60 ps Typical
MTIE
750 ps Typical
Reference Output/Oscillator Output Offset ≤ 8 ns
Static Offset
± 26 ns Maximum
3.0
Dynamic Offset
± 28 ns Maximum
4.0
Input And Output Characteristics
Table 5
Symbol
Parameter
Minimum
VIH
High Level Input Voltage
2
VIL
Low Level Input Voltage
0
TIO
I/O to Output Valid
CO
Output Capacitance
10
pF
VHO
High Level Output Voltage loH = -4mA
VIO
Low Level Output Voltage loL = 8mA
TIR
Input Reference Signal Pulse Width
NOTES:
`
1.0:
2.0:
3.0:
4.0:
Nominal
Maximum
Units
5.5
V
0.8
V
10
nS
2.4
Notes
Vcc Min.
0.4
30
Vcc Max.
nS
Requires external regulation
From a 20 ppm offset in reference frequency
Offset between Reference Input and Reference Output @ room temp.
Offset change between Reference Input and Reference Output over temperature range from room temperature
Data Sheet #: SG048
Page 4 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Output Jitter Specifications
Table 6
Jitter BW 10 Hz - 20 MHz
SONET Jitter BW 12 KHz - 20 MHz
Frequency (MHz)
pS (RMS)
m UI
pS (RMS)
m UI
19.44
10 Typ.
0.194 Typ.
1 Max., 0.5 Typ.
0.019 Max.
125.0
10 Typ.
1.250 Typ.
1 Max., 0.5 Typ.
0.125 Max.
Output Programming
Alarm Status
Table 7
Table 8
Tristate
Free Run
Output
LOL Output LOR Output
Alarm Output
0
0
Locked to reference selected (default)
0
0
No alarm
1
X
Hi-Z Tristate condition
1
0
Loss-of-Lock
0
1
Free run
X
1
Loss-of-Reference
Maximum Package Dimensions
Recommended Footprint Dimensions
Figure 3
Figure 4
0.800
0.640
(20.32mm)
(16.26mm)
0.050 TYP
(1.27mm)
0.080 (2.03mm)
0.100 TYP
(2.54mm)
0.050 TYP
(1.27mm)
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 5 of 16
0.650
(16.51mm)
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
Input Reference Selection
Table 9
Input Sel A
(Pin #14)
Input Sel B
(Pin #13)
0
0
1
0
Reference Frequency
(Pin #8)
8 kHz (default)
16 kHz (Not available w/ 125.0 MHz output)
Reference and Output Availability
Table 10
Input Reference
(Pin #8)
Oscillator Output
(Pin #9)
Reference Output
(Pin #1)
8 kHz
16 kHz
19.44 MHz
8 kHz
16 kHz
8 kHz
125.0 MHz
8 kHz
Data Sheet #: SG048
Page 6 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Alarm Timing Diagram
Figure 5
LOR
Output
Start-up
Region
4
LOL
Output
2
1
Phase
Detector
1
3
External
Reference
Internal
Reference
2
2
2
2
2
2
2
2
2
2
2
2
2
2
LOR
Output
LOL
Output
Phase
Detector
5
1
1
1
3
1
1
3
External
Reference
Internal
Reference
2
2
2
1
2
3
4
5
Start-up Region
2
2
2
2
2
19.44 MHz &77.76 MHz
Reference Input Units
< 1 µsec
2
2
2
2
2
8 kHz Reference Input Units
< 31.25 µsec
1 µsec
31.25 µsec
> 1 µsec
> 31.25 µsec
125 µsec wide range
LOR is active when LOL is active
Minimum pulse width = 2 µsec
2
Minimum pulse width = 62.5 µsec
During Start-up, The LOL Alarm will pulse
during the first second of operation
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 7 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
SCG2000 Jitter Attenuation
Figure 6
Jitter attenuation (dB)
Jitter Attenuation vs. Input Frequency
0.0
-5.0
-10.0
-15.0
-20.0
-25.0
-30.0
-35.0
-40.0
-45.0
1
10
100
INPUT Jitter frequency (Hz)
1000
Typical System Test Setup
Figure 7
Data Sheet #: SG048
Page 8 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
SCG2000i Typical TDEV
Figure 8
TDEV
(seconds)
100.0E-12
10.0E-12
1.0E-3
10.0E-3
100.0E-3
1.0E+0
10.0E+0
Integration Time ( )
(seconds)
SCG2000i Typical MTIE
Figure 9
MTIE
(seconds)
1.0E-9
100.0E-12
1.0E-3
10.0E-3
100.0E-3
1.0E+0
10.0E+0
100.0E+0
Observation Window (S)
(seconds)
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 9 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
SCG2000i Switch from Free Run to a new Reference
Figure 10
000.0E+0
Phase Deviation (sec)
-10.0E-6
-20.0E-6
-30.0E-6
-40.0E-6
-50.0E-6
-60.0E-6
0
1
2
3
4
5
6
7
8
Time (sec)
SCG2000i Switch from a Reference to Free Run
Figure 11
2.0E-6
1.0E-6
000.0E+0
Phase Deviation (sec)
-1.0E-6
-2.0E-6
-3.0E-6
-4.0E-6
-5.0E-6
-6.0E-6
-7.0E-6
-8.0E-6
0
1
2
3
4
5
6
7
8
9
10
11
Time (sec)
Data Sheet #: SG048
Page 10 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
SCG2000i Step Response due to a -20ppm Freq. Step
Figure 12
200.0E+0
000.0E+0
-200.0E+0
Frequency (Hz)
-400.0E+0
-600.0E+0
-800.0E+0
-1.0E+3
-1.2E+3
-1.4E+3
-1.6E+3
-1.8E+3
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
5.8
6
Time (sec)
SCG2000i 1µs Phase Transient Response
Figure 13
1.2E-6
1.0E-6
Time (sec)
800.0E-9
600.0E-9
400.0E-9
200.0E-9
000.0E+0
-200.0E-9
4
5
6
7
8
Time (sec)
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 11 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
Tape and Reel Dimensions
Figure 14
Data Sheet #: SG048
Page 12 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Solder Profile
Figure 15
250
200
Temp
(C˚)
150
100
50
0
1
2
3
4
5
6
7
8
Time(minutes)
Recommended Reflow Profile
Peak Temp:217C˚
MaxRiseSlope:1.5 C˚/Sec
Time Above150C˚:100Sec
Ordering Information
SCG{XXXX}-{FFF.FFF}{M}
XXXX equals a specific model (2000i)
FFF.FFF equals the Oscillator Output frequency (001.544, 002.048, 016.384, 019.44, 020.48,
037.056, 044.736, 049.152, 051.84, 077.76, 125.00)
M equals MHZ and is added to all part numbers
Example: To order an SCG2000i with an Oscillator Output of 19.44 MHz,
Order part number SCG2000i-019.44M
Please contact Connor-Winfield for other frequencies that may be available.
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 13 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
Data Sheet #: SG048
Page 14 of 16
Rev: P02
Date: 10 / 28 / 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Revision
Revision Date
Note
P00
5/14/02
Preliminary Informational Release
P01
5/28/02
Corrected Temp Range in General Description
P02
10/28/02
Added 125.0 MHz model
Data Sheet #: SG048
© Copyright 2002 The Connor-Winfield Corp.
Page 15 of 16
Rev: P02
Date: 10 / 28 / 02
All Rights Reserved Specifications subject to change without notice
2111 Comprehensive Drive
Aurora, Illinois 60505
Phone: 630- 851- 4722
Fax: 630- 851- 5040
www.conwin.com