
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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EX-400
Evacuated Miniature Crystal Oscillator
The EX-400 provides exceptionally low aging rates and tight temperature stabilities in an extremely small package over a wide
range of environmental conditions. This EMXO series bridges the gap between current large, high precision OCXO’s and smaller
TCXO’s. The EX-400 Series becomes the most economical choice where there is a need for spectral purity, short and long term
stability, along with small size and dramatically reduced power consumption.
• 4-Pin Dip
• Uses Doubly Rotated Crystal
• Low Power Consumption: <0.35 watts @ +25°C
• Previous Model Number: EX-380, EX-381, EX-385 series
• Frequency Range: 10 MHz - 80 MHz
• SONET/SDH, DWDM, FDM, ATM, 3G
• Telecom Transmission and Switching Equipment
• Wireless Communication Equipment
• Military Airborne and Mobile systems
Features Applications
Description
Performance Specications
Frequency Stabilities1
Parameter Min Typical Max Units Condition
vs. operating temperature range (reference to
+25°C)
-75
-100
-250
+75
+100
+250
ppb
-20... +70°C (10 to 20.49 MHz)
-20... +70°C (10 to 50 MHz)
-20... +70°C (10 to 80 MHz)
-100
-150
-250
+100
+150
+250
ppb
-40… +85°C (10 to 20.49 MHz)
-40… +85°C (10 to 50 MHz)
-40… +85°C (10 to 80 MHz)
-150
-250
+150
+250 ppb -55… +85°C (10 to 50 MHz)
-55… +85°C (10 to 80 MHz)
vs. Stratum3 per
GR-1244-
CORE
Operating Temp -140
-140
-140
+140
+140
+140
ppb
-20… +70°C
-40… +85°C (10 to 50 MHz)
-55… +85°C (10 to 20.49 MHz)
Holdover
Drift
MTIE
-370
-4.63
+370
+4.63
+1000
ppb
10-13/sec
ns
24 hours
Over 7100 seconds
0.16sec < Observe Times < 64 sec
Warm-up Time 1
2minutes to ± 1ppm of nal frequency (1 hour)
to ± 100ppb of nal frequency (1 hour)
Initial Tolerance (10 to 19.9 MHz)
Initial Tolerance (20 to 80 MHz)
-1.0
-1.5
+1.0
+1.5 ppm for xed frequency
vs. supply voltage change (10 to 50 MHz)
vs. supply voltage change (50 to 80 MHz)
-15
-25
+15
+25 ppb VS ± 5%
vs. load change (10 to 80 MHz) -15 +15 ppb Load ± 5%
EX-400