VCC1
CMOS Crystal Oscillator
VCC1
Description
Vectrons VCC1 Crystal Oscillator (XO) is a quartz stabilized square wave generator with a CMOS output. The VCC1 uses a fundamental or 3rd
overtone crystal resulting in very low jitter performance, and a monolithic IC which improves reliability and reduces cost.
Features Applications
Ultra Low Jitter, Fundamental or 3rd OT Crystal Design
SONET/SDH/DWDM
CMOS Output Crystal Oscillator
Ethernet, GE, SynchE
Output Frequencies from 1.024 MHz to 190.000 MHz
Storage Area Networking
5.0, 3.3, 2.5 or 1.8 V Operation
Fiber Channel
Output Disable Feature
Digital Video
Excellent 20ppm temperature stability
Broadband Access
-10/70C , -40/85C or -55/125C operating temperature
Base Stations, Picocells
Small Industry Standard Package, 5x7mm
Driving A/Ds, D/As, FPGAs
Test and Measurement
Product is compliant to RoHS directive
COTS
and fully compatible with lead free assembly
Block Diagram
V Output
DD
Crystal
Oscillator
GND
E/D
Page1Performance Speci cations
Table 1. Electrical Performance, 5V Option
Parameter Symbol Minimum Typical Maximum Units
Supply
1
Voltage V 4.5 5.0 5.5 V
DD
Max Voltage -0.7 7 V
2
Current I mA
DD
20.000MHz 10
20.001 to 50.000MHz 30
50.001 to 85.000MHz 50
85.001 to 125.000MHz 60
Current, Output Disabled 30 uA
Frequency
3
Nominal Frequency f 1.544 125.000 MHz
N
4
Stability , (Ordering Option) 20, 25, 32, 50, 100 ppm
Outputs
2
Output Logic Levels
Output Logic High V 0.9*V V
OH DD
Output Logic Low V 0.1*V V
OL DD
Output Logic High Drive I 16 mA
OH
Output Logic Low Drive I 16 mA
OL
Load I 15 pF
OUT
2
Output Rise /Fall Time t /t ns
R F
<20.000MHz 8
20.000 to 50.000MHz 5
50.001 to 125.000MHz 2
Output Leakage, Output Disabled I 10 uA
Z
2,5
Duty Cycle 45 50 55 %
6
Period Jitter J ps
RMS 2.5
Peak-Peak 18
RMS Jitter, 12k-20MHz J 0.5 1 ps
Enable/Disable
7
Output Enable/Disable
Output Enable V 4.0 V
IH
Output Disable V 0.8 V
IL
Disable time t 100 ns
D
Enable Internal Pull-Up Resistor 100 Kohm
Start-Up Time t 10 ms
SU
Operating Temp, (Ordering Option) T -10/70, -40/85, -55/125 C
OP
1] The power supply should have by-pass capacitors as close to the supply and to ground as possible, for example 0.1 and 0.01uF
2] Parameters are tested with the test circuit shown in Figure 1.
3] See Standard Frequencies and Ordering Information tables for more speci c information
4] Includes initial accuracy, operating temperature, supply voltage, shock and vibration (not under operation) and 10 years aging.
5] Duty Cycle is measured as On Time/Period, see Fig 2.
6] Broadband Period Jitter measured using a LeCroy Wavemaster 8600A, 90K samples, see Application Note for Typical Phase Noise and Jitter Performance
7] The Output is Enabled if the Enable/Disable is left open.
Page2