NEL SCB1421, SCB1427, SCB1429, SCB142B, SCB142C 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

LVCMOS

SC-B1420 Series

Description

The SC-B1420 Series of quartz crystal oscillators provide enable/disable 3-state LVCMOS compatible
signals for bus connected systems. Supplying Pin 1 of the SC-B1420 units with a logic “1" or open enables
its Pin 3 output. In the disable mode, Pin 3 presents a high impedance to the load.

Features

• Wide frequency range–1.0MHz to 80.0MHz

• User specified tolerance available

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

• Space-saving alternative to discrete component
oscillators

• 2.5 Volt operation

• High shock resistance, to 1000g

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

• Low Jitter - Wavecrest jitter characterization
available

• No internal PLL avoids cascading PLL problems

• Metal lid electrically connected to ground to
reduce EMI

• Gold plated pads

Electrical Connection

Pin Connection

1 Enable/Disable
2 Ground
3 Output
4 V

DD

CRYSTAL CLOCK OSCILLATORS

Data Sheet K2204

Rev. -

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

Email: [e-mail]

www.nelfc.com

SC-B1420 Series Continued

LVCMOS

Operating Conditions and Output Characteristics

Electrical Characteristics

Parameter Symbol Conditions Min Typical Max

Frequency ----- ----- 1.0MHz ----- 80.0MHz
Duty Cycle ----- @ VDD/2 45/55% ----- 55/45%
Logic 0 VOL @ 600µA ----- ----- 0.2V
Logic 1 VOH @ 600µA VDD-0.2V ----- ----­Rise & Fall Time tr,tf 10-90%VO ----- ----- 8.0 ns
Jitter, RMS

(2)

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

T

pz

----- ----- ----- ----- 25 ns
Enable Voltage ----- ----- 2.0V ----- ----­Disable Voltage ----- ----- ----- ----- 0.8V
Frequency Stability

(1)

dF/F Overall conditions including: -100ppm ----- +100ppm

voltage, calibration, temp..
10 year aging, shock, vibration

General Characteristics

Parameter Symbol Conditions Min Typical Max

Supply Voltage

(3)

VDD ----- 2.375V 2.5V 2.625V
Supply Current IDD No Load 0.0 mA ----- 40 mA
Output current IO Low level Output Current 0.0 mA ----- ±16.0 mA
Operating temperature TA ------ 0°C ----- 70°C
Storage temperature TS ----- -55°C ----- 125°C
Power Dissipation P

D

----- ----- ----- 144 mW
Lead temperature TL Soldering, 10 sec. ----- ----- 300°C
Load ----- ----- ----- ----- 15pf
Start-up Time t

s

20MHz or greater ----- ----- 10 ms
Less than 20MHz ----- ----- 2 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

Footnotes:

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

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

3) External high frequency power supply decoupling required.

Rev. -

CRYSTAL CLOCK OSCILLATORS

SC - B142X - FREQ

Package Code

Tolerance/Performance

SC 4 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 K2204