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Preliminary
Precision OCXO
OX400-620LF
Bulletin Cx225
Page 1 of 4
Revision P04
Date 07 Sep 2011
Description:
The Connor-Winfield OX400-620LF,
a 14-Pin DIP Oven Stabilized
Crystal Oscillator (OCXO), is
a precise frequency standard
excellent for use in cellular
base stations, test equipment,
Synchronous Ethernet, VSAT, and
Stratum 3 applications.
Features:
• OCXO - Fixed Frequency
• 3.3V Operation
• LVCMOS
• Frequency Stability: ±20ppb
• Temperature Range: -40 to 85°C
• Low Phase Noise
• 14 Pin DIP Package
• RoHS Compliant / Lead Free
Operating Specifications
Parameter Minimum Nominal Maximum Units Notes
Nominal Frequency (Fo) 20.0 and 24.576 MHz
Frequency Calibration -0.3 - 0.3 ppm 1, 4
Frequency Stability -20 - 20 ppb 2
Frequency vs Change in Supply Voltage -10 - 10 ppb 3
Aging Daily -5 - 5 ppb 4
Aging 1st Year -0.3 - 0.3 ppm
Total Frequency Tolerance (20 years) -1.5 - 1.5 ppm 5
Operating Temperature Range -40 - 85 °C
Supply Voltage (Vcc) 3.13 3.3 3.47 Vdc
Supply Power (-40 to 85°C) - - 2.2 Watts
Phase Jitter (BW = 10KHz to Fo/2) - - 1 ps RMS
Period Jitter - - 5 ps RMS
Allan Variance (1 second) - 5.0E-11 -
SSB Phase Noise at 10Hz offset - -100 - dbc/Hz 6
SSB Phase Noise at 100Hz offset - -120 - dbc/Hz 6
SSB Phase Noise at 1kHz offset - -140 - dbc/Hz 6
SSB Phase Noise at 10kHz offset - -150 - dbc/Hz 6
Start-Up Time Oscillator - - 35 ms
Warm-Up Time - - 3 Minutes 7
Absolute Maximum Ratings
Parameter Minimum Nominal Maximum Units Notes
Storage Temperature -55 - 125 °C
Supply Voltage (Vcc) -0.5 - 4.5 Vdc
Package Characteristics
OX400-Series DIP Package 14 Pin DIP Hermetically Sealed Grounded Welded Package
LVCMOS Output Characteristics
Parameter Minimum Nominal Maximum Units Notes
Load - 15 - pF
Voltage:
High (Voh) 2.60 - - Vdc
Low (Vol) - - 0.40 Vdc
Current
High (loh) -4 - - mA
Low (lol) - - 4 mA
Duty Cycle at 50% of Vcc 45 50 55 %
Rise / Fall Time: 10% to 90% - - 6.5 ns
1. Initial calibration @ 25C.
2. Frequency stability vs. Change in temperature, referenced to 25C.
3. Frequency stability per 5% change in supply voltage.
4. At the time of shipment after 48 hours of operation.
5. Inclusive of calibration, operating temperature range, supply voltage change, shock and vibration 20 years aging.
6. Typical phase noise, results will vary depending on center frequency. The phase noise shown are typical for 20 MHz.
7. Measured @ 25C, within 3 minutes, the unit will be within +/-0.1ppm of its reference frequency, measured after 30 minutes
of continuous operation at a stable 25C.
2111 Comprehensive Drive
Aurora, Illinois 60505
Phone: 630- 851- 4722
Fax: 630- 851- 5040
www.conwin.com
Bulletin Cx262
Page 1 of 2
Revision 03
Date 04 Oct 2017
US Headquarters:
630-851-4722
European Headquarters:
+353-61-472221
Available at Digi-Key**
www.digikey.com
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Specifications subject to change without notification. See Connor-Winfield's website for latest revision.
© Copyright 2017 The Connor-Winfield Corporation Not intended for life support applications.
2111 Comprehensive Drive
Aurora, Illinois 60505
Phone: 630-851-4722
Fax: 630- 851- 5040
www.conwin.com
Bulletin Cx262
Page 2 of 2
Revision 03
Date 04 Oct 2017
14 Pin DIP Package Environmental Characteristics
ENVIRONMENTAL CHARACTERISTICS
Temperature Cycle: Per MIL-STD-883, Method 1010, Condition B. -55°C to 125°C, 300 cycles,1 0 minute dwell, 1minute transition.
Gross Leak Test: Per MIL-STD-202, Method 112, Condition D. No Bubbles in flourinert (FC-43) at125°C ±5°C for 20 seconds
SOLDERING
Pin Solderability: Per MIL-STD-883, Method 2003. 8 hour steam age prior to 254°C ±5°C Solder ot dip, 95% Coverage.
Resistance to Solder Heat: Per MIL-STD-202, Method 210, Condition C. Wave: Topside board-mount product. 260°C ±5°C for 20 seconds
MECHANICAL CHARACTERISTICS
Vibration: Per MIL-STD-202, Method 204, Condition A. 10G’s peak, 10Hz to 500Hz, 15 minute cycles 12 times each
perpendicular axis.
Shock: Per MIL-STD-202, Method 213, Condition F 1500G’s, 0.5ms, half sine, 3 shocks per direction.
Moisture Resistance: Per MIL-STD-202, Method 106. 95% RH @ 65°C, 10 cycles 10°C to 65°C.
Ordering Information
OX400-620LF - 020.0M
OX400-620LF - 024.576M
14 Pin DIP Package CMOS Output Waveform
Test Circuit
90%
50%
10%
17
8
14
OCXO = N/C
15 pF
Pin Connections
Pin Function
1: N/C
7 Ground (Case)
8: Output
14: Vcc
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