background image

 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881

   Email: 

nelsales@nelfc.com

    www.nelfc.com

Differential Positive ECL (DPECL)

Fast Edge

SD-A2960 Series

             

PRELIMINARY  

                                                                                                         

Description

The SD-A2960 Series of quartz crystal oscillators provide DPECL Fast Edge compatible signals.  Systems

designers may now specify space-saving, cost-effective packaged PECL oscillators to meet their timing

requirements.

Features

• Wide frequency range–125.0MHz to 312.5MHz

• User specified tolerance available

• Will withstand vapor phase temperatures of 253°C 

     for 4 minutes maximum

• Space-saving alternative to discrete component      

   oscillators

• High shock resistance, to 1000g   

• 3.3 volt operation

• Metal lid electrically connected to ground to             

   reduce EMI                        

• Fast rise and fall times <600 ps                      

• High Reliability - NEL HALT/HASS qualified for

    crystal oscillator start-up conditions

• Low Jitter - Wavecrest jitter characterization

    available

• Overtone technology

• High Q Crystal actively tuned oscillator circuit

• Power supply decoupling internal

• No internal PLL avoids cascading PLL problems

• High frequencies due to proprietary design 

• Gold plated pads

Electrical Connection

         

Pin       Connection

  1      Enable/Disable

  2      N.C. 

  3      V

EE

 /Ground

  4      Output

  5      /Output

  6      V

CC

     

 

CRYSTAL CLOCK OSCILLATORS

Data Sheet 0202A

Rev. B

background image

 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881

   Email: 

nelsales@nelfc.com

    www.nelfc.com

SD-A2960 Series     Continued

         

Differential Positive ECL (DPECL)

 

Fast Edge

Operating Conditions and Output Characteristics 

                                                                                    

Electrical Characteristics

Parameter

Symbol

Conditions

Min

Typical

Max

Frequency 

-----

-----

125.0MHz            -----

312.5MHz

Duty Cycle                         -----

        

@ V

CC

-1.29V              

45/55%                -----

55/45%

Logic 0 

(2)

V

OL

                 

-----                         

1.35V          

-----

1.70V 

Logic 1

(2)

V

OH

                      -----                         

2.28V            

----- 

2.56V

Rise & Fall Time 

tr,tf     20-80%V

with 50 ohm load to V

CC

-2V -----                      -----

600 psec

T

pd

 (4)

-----

-----

-200 psec

-----

+200 psec

Jitter, RMS

(3)

-----

-----

-----

-----

3 psec

Enable Voltage

(5)

-----

with V

EE

 = 0V

0V

-----

1.0V

Disable Voltage

-----

with V

EE

 = 0V

3.0V

-----

V

CC

Frequency Stability 

(1)

       dF/F

Overall conditions including:

-100ppm

-----

+100ppm

voltage, calibration, temp.,

10 yr aging, shock, vibration  

                                                                                                               

                                        

General Characteristics

Parameter

Symbol

Conditions

Min

Typical

Max

Supply Voltage 

V

CC

               

-----                           

3.15V                  3.3V

3.45V

Supply Current 

I

CC

                  

50 ohm termination      

0.0 mA             

-----

80 mA

To 2.00V below V

CC

Output current 

I

O

                  

Low level Output Current  0.0 mA               -----

±50.0 mA

Operating temperature 

T

A

     

------                               

0°C                     -----

70°C

Storage temperature 

T

S

          

-----                                  -55°C                  -----

125°C

Power Dissipation

P

D

-----

-----

-----

276 mW

Lead temperature 

T

L

              

Soldering, 10 sec.            -----                    -----

300°C

Load

50 Ohm to V

CC

-2V or Thevenin Equivalent, Bias Required

Start-up time

t

S

-----

-----

2 ms

10 ms

Environmental and Mechanical Characteristics

Mechanical Shock

Per MIL-STD-202, Method 213, Condition E

Thermal Shock

Per MIL-STD-833, Method 1011, Condition A

Vibration

0.060" double amplitude 10 Hz to 55 Hz, 35g’s 55Hz to 2000 Hz

Soldering Condition

300°C for 10 seconds 

Hermetic Seal

Leak rate less than 1 x 10

 -8

 atm.cc/sec of helium

Footnotes:

1) Standard frequency stability (±20,±25,±50ppm & others available)

2) V

OL

, V

OH

, referenced to ground (V

EE

) with V

CC

 = 3.3V

3) Jitter performance is frequency dependent.  Please contact factory for full Wavecrest characterization.

4) Tpd is phse shift between the falling edge of pin 4 at 2.0V and the rising edge of pin 5 at 2.01V.

5) Open to enable pin also enables the output.

Rev. B

CRYSTAL CLOCK OSCILLATORS

SD - A296X - FREQ

Package Code

Tolerance/Performance

SD     6 pad 5x7mm SMD

0   ±100ppm 0-70°C

 

1   ±50ppm 0-70°C

7   ±25ppm 0-70°C

Input Voltage

9   Customer Specific

Code    Specification

A   ±20ppm 0-70°C

A          3.3V

B   ±50ppm -40 to +85°C

B          2.5V

C   ±100ppm -40 to +85°C

             5V

Creating a Part Number

Data Sheet 0202A