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Features:
Typical 25.4 x 22.1 x 15.3 mm.
SC-Cut Crystal
High Stability; Low Phase Noise
CMOS//Sine Wave; Fast Warm-up
The OCXO 145 series oscillators feature small surface-mounted
packages designed for applications where space is at a premium
and good frequency stability is required. The oscillators can be
used in phased locked loops or as stand alone references in many
communications applications such as Stratum 3 switching apparatus
or cellular telephone base stations. An internal voltage reference
can be provided to make frequency corrections via a simple
potentiometer or may be used as a voltage source for a digital to
analog converter. A choice of quartz resonators offers a variety of
performance versus cost options to fit most applications.
Ordering Information
OCXO
Package
(mm)
Supply
Voltage
(V)
Pulling
Range
(ppm)
Freq.
Stability
(ppb)
Temp.
Range
(ºC)
Output Logic and Symmetry
Oscillator
Mode
Pin Out
Lead Free
Freq.
(MHz)
145 L: 25.4 12.0.
±0.4
± 5 0~+50
Output
Symmetry
* Not
Normal
RoHS
XX.XXXXXX
Series W: 22.1
5.0
±1.0 ± 10 0~+70 CMOS15pF 50±5% selectable
Compliant
H: 15.3
3.3
± 20 -30~+70 Sine Wave
± 30
by
customer
Please refer
to "OUTLINE
Not RoHS
Compliant
± 50 DRAWING"
Ordering Example: OCXO 145 Series; VDD: 3.3 V; Pulling Range: ±0.4ppm; freq. Stability: ± 30 ppb; Temp. Range: 0ºC to
+ 70ºC; CMOS15pF, Symmetry: 50±5%; Pin Out: Normal; RoHS Compliant; Freq. 10.000000 MHz.
Outline Drawing

Freq. Stability vs. TEMP. Range
ppb ±5
±10 ±20 ±30
Temp. (ºC)
0 to +50
0 to +70
   
  
-30 to +70
X
  
= Standard = Available (case by case) X = Not available
INCH
mm (Reference only)
PIN CONNECTIONS
PIN
1
(See Note 1)
2
(See Note 1)
3
4
5
6
7
FUNCTION
VCO INPUT
or
NOT CONNECTED
REFERENCE VOLTAGE
or
NOT CONNECTED
+VDC
R.F. OUTPUT
OVEN MONITOR
or
NOT CONNECTED
0 VOLTS & CASE
0 VOLTS & CASE
Note1: If the specification does not specify
parameters for either PIN 1, PIN 2 or PIN 5
then that respective PIN is not internally
CONNECTED.
1
Contact e-mail: info@isotemp.com for special request
1

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Electrical Specification
Output
Frequency
Wave Form
Level “1”
Level “0”
Load
Spurious
Min.
Nominal
Max.
10.00
CMOS
2.4
0.4
15
-70
Note
Frequency Stability
Ambient
Operating Temperature
Aging *
At time of shipment
After indefinite storage
Daily
Yearly
10 Years
Voltage
Warm-up
0
±30
+70
±1.0
±1.0
±100
±350
±10
±10
Referenced to +25ºC
After 30 days
VDC ±5% change
In 4 minutes @+25ºC
(Reference to 1 hour)
Phase Noise @ 10 MHz
@ 10 Hz
@ 100 Hz
@ 1 Hz
@ 10 kHz
Electrical Frequency Adjustment
Range
Control
Slope
Center
Input Impedance
-115
-135
-140
-140
0.4 1.0
0.0 2.8
Positive
Control Voltage at which
1.0 1.4 1.8 nominal frequency occurs at
time of shipment
100
Input Power
Voltage
@ turn on
Steady state @25ºC
3.14 3.3 3.46
3.0
1.0
Reference Voltage
Voltage
Load
Temperature Stability
2.72 2.8 2.88
9.0 
±0.01
* All aging stabilities are after storage of up to one year and apply after 30 days of continuous operation.
The daily aging rate also applies at the time of shipment from factory.
** The electronic frequency adjustment range is sufficient for the life of the oscillator specifications subject to change with frequency.
Available Frequency Range: 5 MHz to 40 MHz Including 5.0, 10.0, 16.384, 19.44, 24.576, 24.704 and 32.768 MHz
Unit
MHz
V
Pf
DBc
ppb
ºC
ppb
ppb
dBc
±ppm
V
V
K
V
W
V
K
VDC
1
Contact e-mail: info@isotemp.com for special request
2