
CRYSTAL OSCILLATORS
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
Data Sheet 0635C
Specifications 
Parameter 
Absolute Maximum Ratings 
Input Break 
Down Voltage 
Storage temp. 
Contr. Voltage 
Electrical
Frequency 
Range 
Symb 
Condition 
Min 
Typ 
Max 
Unit 
Note 
OH-X8FXXXXX Series HF/UHF OCXO Low Power SMD                 Rev. A
Vcc 
-0.5 
5.5 
V 
Ts 
Vc 
-40 
-1 
85 
9 
° C 
V 
F 
CMOS 
Sine-wave 
PECL, LVDS 
30 
30 
30 
3.135 
4.75 
200 
1,000 
1,000 
3.465 
5.25 
90 
160 
MHz 
Input Voltage 
Vcc 
3.30 
5.0 
V 
3 
5 
Input Current 
Icc At room, steady state
mA 
@ 100 MHz, 3.3V 
@ 622 MHz, 3.3V 
See chart 
First Year 
15 years 
Frequency 
Stability  
Δ
F/F 
vs. Temperature 
vs. Vcc 
aging 
±50 
±2 
±0.1 
±0.5 
±0.1 
15pF/10KOhm 
Internally AC-coupled 50 Ohm 
50 Ohm to Vcc-2V or  Thevenin equivalent 
100 Ohm between the outputs, receiving end 
45 
50 
3 
0.35 
0.9Vcc 
Vcc-0.96 
Vcc-1.85 
247 
330 
ppb 
ppb/V 
ppm/year 
ppm 
ppm 
Calibration 
Load 
Δ
F/F 
As shipped, 25oC 
CMOS 
Sine 
PECL 
LVDS 
@50% 
20 to 80 % 
Duty cycle 
Rise/Fall time 
55 
% 
ns 
CMOS, PECL, LVDS 
CMOS 
PECL, LVDS 
100K available 
100K available 
Tr/Tf 
Logic "1" level 
Logic "0" level 
Logic "1" level 
Logic "0" level 
Output Levels, 
LVDS 
Voh 
Vol 
Voh 
Vol 
Vo
d 
Vo
f 
P 
CMOS 
CMOS 
PECL 
PECL 
V 
V 
V 
V 
mV 
0.1Vcc 
Vcc-0.81
Vcc-1.65
454 
Differential 
amplitude 
Amplitude error 
Offset voltage 
50 
mV 
V 
1.125 
1.25 
1.375 
Offset error 
Sinewave Into 50 
Ohm 
50 
mV 
dBm 
Output power 
0 
4 
3 
7 
2 
0.4 
0.2 
-45 
3.3V 
5.0V 
Start up time 
Phase jitter 
Ts 
10 
1 
0.4 
-40 
none 
-60 
-25 
ms 
ps 
1
σ
100 Hz to 20 MHz 
12 KHz to 20 MHz 
F>250MHz 
F< 250 MHz 
@100 MHz, CMOS, Sine 
Subharmonics 
Sine, PECL, LVDS 
CMOS, Sine 
Sine-wave 
@10 Hz 
@100 Hz 
@1 KHz 
@10 KHz 
@100 KHz 
@10 Hz 
@100 Hz 
@1 KHz 
@10 KHz 
@100 KHz 
dBc 
Spurious 
Harmonics 
SSB Phase Noise 
dBc 
dBc 
dBc/Hz 
-30 
-100 
-125 
-140 
-160 
-165 
-80 
-100 
-120 
SSB Phase Noise 
-145/-140
-150/-145
> 10KOhm 
dBc/Hz 
@622 MHz; 
Sine/PECL,LVDS 
Input 
Impedance 
Control voltage 
Modulation 
bandwidth 
Deviation 
Vc 
MB 
0 
3.3 
V 
100 Hz 
Contact Factory for wider MB 
Vc=0V to 3.3V,25°C
±0.5 
±1.0 
ppm