NEL SK2970, SK2971, SK2977, SK2979, SK297A Datasheet

357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone [phone] FAX [phone]

Email: [e-mail]

www.nelfc.com

Differential Positive ECL (DPECL)

SK-A2970 Series

PRELIMINARY

Description

The SK-A2970 Series of quartz crystal oscillators provide DPECL Fast Edge compatible signals. This
device is to operate using positive voltage and uses multiple ground pins for improved signal integrity. This
device is intended to operate on positive voltage for PECL applications.

Features

• Wide frequency range–671.0MHz to 1.7GHz

• User specified tolerance available

• Case at electrical ground

• Will withstand vapor phase temperatures of 253°C
for 4 minutes maximum

• All metal, resistance weld, hermetically sealed
package

• High shock resistance, to 1500g

• Low Jitter - Wavecrest jitter characterization
available

• High Reliability - NEL HALT/HASS qualified for
crystal oscillator start-up conditions

• Overtone technology

• High Q Crystal actively tuned oscillator circuit

• Power supply decoupling internal

• Dual ground plane for added stability

• No internal PLL avoids cascading PLL problems

• High frequencies due to proprietary design

Electrical Connection

Pin Connection

1 V

CC

2 VEE Case
6 V

EE

Case
7 Output
8 /Output
9 V

EE

Case
13 V

EE

Case
14 Enable/Disable

CRYSTAL CLOCK OSCILLATORS

Data Sheet 0208G

Rev. A

357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone [phone] FAX [phone]

Email: [e-mail]

www.nelfc.com

SK-A2970 Series Continued

Differential Positive ECL (DPECL)

Operating Conditions and Output Characteristics

Electrical Characteristics

Parameter Symbol Conditions Min Typical Max

Frequency ----- ----- 671.0MHz ----- 1.7GHz
Duty Cycle ----- @ 50% points 45/55% ----- 55/45%
Logic 0

(2)

VOL ----- VCC-1.95V ----- VCC-1.60V

Logic 1

(2)

VOH ----- VCC-1.02V ----- VCC-0.74V
Rise & Fall Time tr,tf 20-80%VO with 50 ohm load to VCC-2V ----- 300 psec 400 psec
Jitter, RMS

(3)

----- ----- ----- 3 psec -----

Enable Voltage

(4)

---- with VEE=0V 0V ----- 1.0V
Disable Voltage ----- with VEE=0V 3.0V ----- VCC
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 VCC ----- 3.135V 3.3V 3.465V
Supply Current ICC 50 ohm termination 0.0 mA ----- 150 mA

To 2.00V below V

CC

Output current IO Low level Output Current 0.0 mA ----- ±50.0 mA
Operating temperature TA ------ 0°C ----- 70°C
Storage temperature TS ----- -55°C ----- 125°C
Input: Logic High (ECL) - Disables
VEE or Open - Enables
Lead temperature TL Soldering, 10 sec. ----- ----- 300°C
Load 50 Ohm to VCC-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) VOL, VOH, referenced to ground

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

4) Open to Enable pin also enables to output.

Rev. A

CRYSTAL CLOCK OSCILLATORS

SK - A297X - FREQ

Package Code

Tolerance/Performance

HK Leaded 8 pin (14pin) 0 ±100ppm 0-70°C
SK 8 pin (14 pin) SMD Gull 1 ±50ppm 0-70°C

Wing 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
5V C ±100ppm -40 to +85°C

Creating a Part Number

Data Sheet 0208G