Holdover Reference Oscillator
OX-203
OX-203
Description
The Holdover Reference Oscillator family is designed specifically to meet the need for a high accuracy cost effective backup
reference.
These high stability oscillators will provide consistent, repeatable, extended holdover to the stated phase accuracy - making them
ideal for applications where GPS, 1588 or other sources of timing are intermittent or prone to extended periods of unavailability.
Features
• Available in 8 hour and 24 hour version
• Holdover accuracy available to
≤8μs
and
≤1μs
• Specifically designed for inter-operability with existing designs
based on conventional OCXO’s.
• Advanced digital compensation techniques take place inside
the Holdover Reference - no need for programming or other user
intervention.
Applications
• Precision Timing Applications in:
•
Wireless Base Stations
•
Wireless Backhaul
•
Digital Video Broadcast
•
Low latency optical networking
•
Power distribution
•
Test and Measurement
Specifications
Parameter
Ouput Frequency
Holdover Accuracy
over 8 hours
(ordering option)
Holdover Accuracy
over 8 hours
(ordering option)
Holdover Accuracy
over 24 hours
(ordering option)
Warm up time
Min
5
Typical
Max
20
8.0
Units
MHz
μs
Condition
150C range, Vs ±5%, Load +-5%, after 24 hours of operation
1.0
μs
150C range, Vs ±5%, Load +-5%, after 24 hours of operation
8.0
μs
150C range, Vs ±5%, Load +-5%, after 24 hours of operation
5
minutes
to ±10ppb of final frequency (1 hour reading) @25 0C
Specifications (continued)
Parameter
Supply voltage
Power Consumption
Power Consumption
Signal
Load
Signal Level (Vol)
Signal Level (Voh)
Duty Cycle
Signal
Load
Output Power @ 5.0V
Sub Harmonics
Spurious
Tuning Range
Tuning Range
Linearity
Tuning Slope
Control Voltage
Range
Phase Noise 1 Hz
Phase Noise 10 Hz
Phase Noise 100 Hz
Phase Noise 1kHz
Phase Noise 10kHz
Maximum supply
voltage
Maximum output
load
Operable Tempera-
ture Range
Storage Temperature
Range
Weight
Dimensions
-40
-55
0
1.65
-98
-125
-135
-143
-150
+-0.15
10%
Positive
3.3
-90
-120
-130
-138
-145
6.0
50
85
85
Vdc
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
With Vs = 5.0 Vdc
@10MHz
0
50
3
6
-25
-65
Fixed OCXO; No adjustment
+-0.4
ppm
3.5
40
Sine Wave
Ohm
dBm
dBc
dBc
50 Ohm Load
50 Ohm Load
50 Ohm Load
60
15
0.5
HCMOS
pF
Vdc
Vdc
%
With Vs=5.0 and 15pF load
With Vs=5.0 and 15pF load
@ (Voh-Vol)/2
Min
4.75
Typical
5
Max
5.25
3.1
1.5
Units
Supply
Vdc
Watts
Watts
Condition
during warmup
steady state at 25 0C
Output
Maximum Ratings
Vdc
pF
0C
0C
Mechanical
16.0
25.8x25.8x15.35
g
mm
Typical Performance Data
Holdover Perfomance - 96 Hours
MTIE and TDEV - 0.3mHz loop filter bandwidth
Outline Drawing
Pin Assignment
Pin
1
2
4
6
7
13
15
17
19
Connection
RF Output
Do Not Connect
Case Ground
Do Not Connect
EFC (Frequency Control)
Do Not Connect
Do Not Connect
Do Not Connect
Supply Voltage
Ordering Information
OX - 203 1 - D A E - 808 0 - 10M0000000
Product
OX: OCXO
Package Type
203: THT Version
Height
1: 15.35mm
Supply Voltage
D: 5.0V
Output
A: HCMOS
E: Sinewave
Frequency
Frequency Control
0: No Tuning
1: ±0.15 to ±0.4ppm
Holdover Range
808: 8μs over 8 hours
824: 8μs over 24 hours
Temperature Range 108: 1μs over 8 hours
E: -40 to +85 0C
J: -20 to +70 0C
*Note: not all combination of options are available.
P: 0 to +50 0C
Other specifications may be available upon request.
Contact Information
100 Watts Street
Mt Holly Springs, PA 17065
Tel: 1.717.486.3411
Fax: 1.717.486.5920
USA:
Landstrasse
74924 Neckarbischofsheim
Germany
Tel: +49 (0) 7268.801.0
Fax: +49 (0) 7268.801.281
Europe:
Information contained in this publication regarding device applications and the like is provided only for your convenience and
may be superseded by updates. It is your reasonability to ensure that your application meets with your specifications. MICROCHIP
MAKES NO REPRESENTATION OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATU-
TORY OR OTHERWISE, RELATED TO THE INFORMATION INCLUDING, BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFOR-
MANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use.
Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,
indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses
are conveyed, implicitly, or otherwise, under any Microchip intellectual property rights unless otherwise stated.
Trademarks
The Microchip and Vectron names and logos are registered trademarks of Microchip Technology Incorporated in the U.S.A. and
other countries.
Revision 5-3-19 jar
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