
Surface Mount VCXO
ECM Electronics Limited, Penmaen House, Ashington, West Sussex, RH20 3JR, UK
Tel: +44(0)1903 892810: Fax: +44(0)1903 892738. Email: ecm@ecmelectronics.co.uk
Although we have attempted to accurately reflect the products we market. ECM reserve the right without prior notice to
discontinue any product or make design changes we believe necessary.
Issue 1
ECM VF194 / 294
Environmental & Mechanical
Mechanical
Shock
Cond E
Thermal
Shock
Cond A
Vibration
MIL-STD-883 Method 2007
Cond A
Soldering
230
0
C for 90s max
Hermetic
Seal
Atm.cc/s of helium
Mil STD 202 Method 213
Mil STD 883 Method 1011
Leak rate less than 5x10
-8
Parameter
Frequency Range
Stability
Supply Voltage
VF194 – VF294
1.54MHz to 160.0MHz
+/-25ppm
5V +/-5%
3.3V +/-5%
30mA
10TTL gates or 50pF
40 / 60 or 45/55
6nS max
0.9Vcc min
0.1Vcc max
10mS max
1pS max
20pS max
10kHz @ -3dB min
50K ohm min
0V to 5.0V
0V to 3.3V
+/- 50ppm
+/-20%
2.50V typ
1.65V typ
Input HIGH (>2.5V) or floating: ACTIVE
Input LOW (<0.5V): INFINITE IMPEDANCE
100ns max
0
0
C to +70
0
C
-45
0
C to +85
0
C Available
Notes
Vs. Temp
Standard
Option
No Load
Specify
Max Load
Max Load
2mS Typ
<52MHz
>52MHz
Supply Current
Load
Duty Cycle
Rise & Fall Times
Logic “1” Level
Logic “0” Level
Start Up Time
Phase Jitter
Modulation BW
Input Impedance
Control Voltage
Pulling Range
Linearity
Setability (Vc for
center frequency)
Tristate Fuction
Fm<10kHz
Vcc 5.0V
Vcc 3.3V
Or Specify
Vcc 5.0V
Vcc 3.3V
Enable Disable
Operating Temp
Standard
Option
Part Numbering VF194 /294 S H L 1 50 155.52M
Type
Stability S = 20ppm Blank = Std
Duty Cycle H = 45/55 Blank = 46/60
Supply Voltage L = 3.3V Blank = 5.0
Temperature Range 1 = -40
0
C to +85
0
C
Blank = Standard
Pulling Range Blank = Std or specify
Frequency
§
Very Low Phase Jitter
§
Industrial Temperature Range
§
Miniature Ceramic Package
§
SMD Tri-state Oscillator
§
3.3V Supply
Pin (VF194)
Connection
Pin (VF194)
Connection
1
Vc
6
O/P
2
N/C
5
Tri
3
GND
4
Vcc
Pin (VF294)
Connection
Pin (VF294)
Connection
1
Vc
6
Vcc
2
Tri
5
N/C
3
GND
4
O/P
A
7.7
B
5.2
C
2.3
D
1.14
E
5.08
F
1.27
G
3.93
Dimensions in mm