1180026-XXX
20.000 MHz OCXO
Stratum 3E
♦Frequency Stability to Stratum 3E of GR-1244
♦Recommended for or use with Zarlink
SONET/SDH System Synchronizer Chip Sets
♦+3.3Vdc or +5.0Vdc Operation
♦Precision Low Aging “SC” Cut Crystal
♦Through-Hole or Surface Mount Configuration
♦RoHS Compliant
Electrical Characteristics
Parameter
Sym
Conditions
Min
Typical
Max
Unit
Power Requirements
± 5%
± 5%
3.135
4.75
3.30
5.0
3.465
5.25
Vdc
Vdc
Vcc
Power Supply ¹
3.5
4.0
W
Turn-On Power
Pmax
Vcc = Max. Std. Load
Steady State Power
Start-Up Time
Pss
Tsu
Twu
1.5
W
Vcc = Max Std. Load @ +25°C
To 90% Amplitude
50
15
mSec
minutes
Warm-Up Time
To meet full spec @ +25°C
Frequency Stabilities
Center Frequency
20.000
MHz
ppm
ppb
ppb
fnom
fcal
Initial Tolerance
Ta = +25°C (At time of Shipment)
± 0.3
± 0.5
± 8
Frequency vs. Temperature
Frequency vs. Voltage
∆f/∆Temp
∆f/∆Vcc
± 6
± 1
± 1
Operating Temperature ¹
Vcc ± 5%
per Day
20 years
ppb
ppm
Frequency vs Time (Aging)
24 Hour Holdover Stability
∆f/∆Time
∆f/24Hr
∆f/Life
± 1.5
± 10
Inclusive of Temperature, Supply
Variation and 24 hours Aging
ppb
± 8
Total Free-Running
Accuracy
All Conditions for 20 years
ppm
± 2.1
(Reference to fnom
)
Waveform: HCMOS Output
Symmetry
Sym
Vo
@ 50% Level
40
50
60
%
Logic “1”
Logic “0”
0.9Vcc
V
V
Amplitude
0.1Vcc
7
Rise/Fall Times
Load
tr, tf
RL
20% to 80%
4
nSec
Output to Ground
10KΩ // 15pF
Sub-Harmonics
Phase Noise
-25
-60
dBc
Offset = 1 Hz
10 Hz
-70
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
-103
-130
-140
-142
-100
-125
-130
-135
100 Hz
1 KHz
10 KHz
1
See Dash Number Table for Voltage and Operating Temperature
♦♦♦ CTS ♦ 171 Covington Dr. ♦ Bloomingdale, IL 60108 ♦ 800-757-6686 ♦ www.ctscorp.com ♦♦♦
REVISION X4 Page 1 of 4
