SCG2000-20.48M - Connor-Winfield

Application

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.

Features

•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

SCG2000i

Synchronous Clock

Generators

PLL

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630- 851-4722

Fax: 630- 851- 5040

www.conwin.com

Bulletin SG048

Page 1 of 16

Revision P02

Date 28 Oct 02

Issued By MBATTS

Data Sheet #: SG048 Page 2 of 16 Rev: P02 Date: 10 / 28 / 02

Functional Block Diagram

Figure 1

ALARM

DETECTION

Reference Input

(Pin 8) DIVIDER DPFD ANALOG

FILTER

DIVIDER

FREE RUN

CONTROL

Free Run Enable

(Pin 5)

Input Freq. Select A

(Pin 14)

LOL Alarm Output

(Pin 7)

VCXO

LOR Alarm Output

(Pin 6)

Oscillator Output

(Pin 9)

Optional Oscillator Output

(Pin 1)

Reference Output

(Pin 1)

(Not available on

models with optional

oscillator output)

Input Freq. Select B

(Pin 13)

Tri-State Enable

(Pin 10)

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.

General Description

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, Tri-

state and alarm outputs for Loss-of-Reference, (LOR), Loss-of-

Lock, (LOL). During the LOR alarm, the SCG2000i will also enter

a Free Run state which will guarantee a 20 ppm accurate output

Model Comparison Table

Table 1

Max

Model Input Duty Reference Output Oscillator Output Notes

Ref Freq Cycle (Pin #1) (Pin #9)

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 Tight Duty Cycle

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 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 3 of 16 Rev: P02 Date: 10 / 28 / 02

Typical Application

Figure 2

Pin Description

Table 2

Pin # Connection Description

1 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.

Input Select

MUX

System Select

BITS

System

Signal

CW's STM/MSTM module

CW's SCG

2000/4000

CW's SCG

2000/4000

A

B

S

Y

A

B

Y

S

A

B

A

B

S

Y

S

Y

Timing Card #1

Timing Card #N

Line Card 1

RCV

Clock out

Line Card #N

Data Sheet #: SG048 Page 4 of 16 Rev: P02 Date: 10 / 28 / 02

Absolute Maximum Rating

Table 3

Symbol Parameter Minimum Nominal Maximum Units Notes

Vcc Power Supply Voltage -0.5 4 Volts

V1 Input Voltage -0.5 5.5 Volts

Ts Storage Temperature -65 150 deg. C

Input And Output Characteristics

Table 5

Symbol Parameter Minimum Nominal Maximum Units Notes

VIH High Level Input Voltage 2 5.5 V

VIL Low Level Input Voltage 0 0.8 V

TIO I/O to Output Valid 10 nS

COOutput Capacitance 10 pF

VHO High Level Output Voltage loH = -4mA 2.4 Vcc Min.

VIO Low Level Output Voltage loL = 8mA 0.4 Vcc Max.

TIR Input Reference Signal Pulse Width 30 nS

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 2.0

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

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

NOTES: 1.0: Requires external regulation

` 2.0: From a 20 ppm offset in reference frequency

3.0: Offset between Reference Input and Reference Output @ room temp.

4.0: Offset change between Reference Input and Reference Output over temperature range from room temperature

Data Sheet #: SG048 Page 5 of 16 Rev: P02 Date: 10 / 28 / 02

Maximum Package Dimensions

Figure 3

Recommended Footprint Dimensions

Figure 4

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

Table 7

Tristate Free Run Output

0 0 Locked to reference selected (default)

1 X Hi-Z Tristate condition

0 1 Free run

0.650

0.100 TYP

0.050 TYP

0.800

0.640

0.080

(16.51mm)

(1.27mm)

(16.26mm)

(20.32mm)

(2.03mm)

0.050 TYP

(1.27mm)

(2.54mm)

Alarm Status

Table 8

LOL Output LOR Output Alarm Output

0 0 No alarm

1 0 Loss-of-Lock

X 1 Loss-of-Reference

Data Sheet #: SG048 Page 6 of 16 Rev: P02 Date: 10 / 28 / 02

Input Reference Selection

Table 9

Input Sel A Input Sel B Reference Frequency

(Pin #14) (Pin #13) (Pin #8)

0 0 8 kHz (default)

1 0 16 kHz (Not available w/ 125.0 MHz output)

Reference and Output Availability

Table 10

Input Reference Oscillator Output Reference Output

(Pin #8) (Pin #9) (Pin #1)

8 kHz 19.44 MHz 8 kHz

16 kHz 16 kHz

8 kHz 125.0 MHz 8 kHz

Data Sheet #: SG048 Page 7 of 16 Rev: P02 Date: 10 / 28 / 02

Alarm Timing Diagram

Figure 5

LOL

Output

Phase

Detector

External

Reference

Internal

Reference

LOR

Output 4

2 2 2 2 2 2 2 2 2 2 2 2 2 2

3

2

Start-up

Region

Start-up Region

LOL

Output

Phase

Detector

External

Reference

Internal

Reference

LOR

Output

33

2

2222 22

22 2

11 1 1

2 2

1 1

2 2

1

5

1

19.44 MHz &77.76 MHz

Reference Input Units 8 kHz Reference Input Units

< 31.25 µsec

31.25 µsec

> 31.25 µsec

< 1 µsec

> 1 µsec

1 µsec

2

3

4

125 µsec wide rangeLOR is active when LOL is active

5

Minimum pulse width = 2 µsec Minimum pulse width = 62.5 µsec

During Start-up, The LOL Alarm will pulse

during the first second of operation

Data Sheet #: SG048 Page 8 of 16 Rev: P02 Date: 10 / 28 / 02

SCG2000 Jitter Attenuation

Figure 6

Typical System Test Setup

Figure 7

Jitter Attenuation vs. Input Frequency

-45.0

-40.0

-35.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

1 10 100 1000

INPUT Jitter frequency (Hz)

Jitter attenuation (dB)

Data Sheet #: SG048 Page 9 of 16 Rev: P02 Date: 10 / 28 / 02

SCG2000i Typical TDEV

Figure 8

SCG2000i Typical MTIE

Figure 9

10.0E-12

100.0E-12

1.0E-3 10.0E-3 100.0E-3 1.0E+0 10.0E+0

Integration Time ( )

(seconds)

TDEV

(seconds)

100.0E-12

1.0E-9

1.0E-3 10.0E-3 100.0E-3 1.0E+0 10.0E+0 100.0E+0

Observation Window (S)

(seconds)

MTIE

(s ec ond s)

Data Sheet #: SG048 Page 10 of 16 Rev: P02 Date: 10 / 28 / 02

SCG2000i Switch from Free Run to a new Reference

Figure 10

-60.0E-6

-50.0E-6

-40.0E-6

-30.0E-6

-20.0E-6

-10.0E-6

000.0E+0

012345678

Time (sec)

Phase Deviation (sec)

-8.0E-6

-7.0E-6

-6.0E-6

-5.0E-6

-4.0E-6

-3.0E-6

-2.0E-6

-1.0E-6

000.0E+0

1.0E-6

2.0E-6

01234567891011

Time (sec)

Phase Deviation (sec)

SCG2000i Switch from a Reference to Free Run

Figure 11

Data Sheet #: SG048 Page 11 of 16 Rev: P02 Date: 10 / 28 / 02

-200.0E-9

000.0E+0

200.0E-9

400.0E-9

600.0E-9

800.0E-9

1.0E-6

1.2E-6

45678

Time (sec)

-1.8E+3

-1.6E+3

-1.4E+3

-1.2E+3

-1.0E+3

-800.0E+0

-600.0E+0

-400.0E+0

-200.0E+0

000.0E+0

200.0E+0

4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 5.8 6

Time (sec)

Frequency (Hz)

SCG2000i 1µs Phase Transient Response

Figure 13

SCG2000i Step Response due to a -20ppm Freq. Step

Figure 12

Data Sheet #: SG048 Page 12 of 16 Rev: P02 Date: 10 / 28 / 02

Tape and Reel Dimensions

Figure 14

Data Sheet #: SG048 Page 13 of 16 Rev: P02 Date: 10 / 28 / 02

Solder Profile

Figure 15

Temp

0

100

150

200

250

50

12345678

Time(minutes)

(C˚)

Recommended Reflow Profile

Peak Temp:217C˚

MaxRiseSlope:1.5C˚/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 Page 14 of 16 Rev: P02 Date: 10 / 28 / 02

Data Sheet #: SG048 Page 15 of 16 Rev: P02 Date: 10 / 28 / 02

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

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630-851-4722

Fax: 630- 851- 5040

www.conwin.com