EURO
QUARTZ
Sinewave output TCXO 10kOhm//10pF
Wide frequency range 10MHz to 30MHz
Supply Voltage from 2.8 to 5.0 Volts
Produced as TCXO or VCTCXO with EFC
EM44U SINEWAVE TCXO
10kOhm//10pF TCXO 4 pad SMD package
EM44 - OUTLINES AND DIMENSIONS
DESCRIPTION
EM44U series TCXOs are packaged in a four pad SMD 9.6 x 11.4 x
4.7mm height package. The TCXO may be specified to operate at any
supply voltage from 2.8 to 5.0 Volts. Close tolerances from ±1ppm
over -40° to +85°C are available. With true sine wave output, the part
can be produced as either a standard TCXO or a voltage-controlled
TCXO (VCTCXO).
SPECIFICATION
Product Series Code
TCXO:
VCTCXO:
Load:
Frequency Range:
Output Waveform:
Initial Calibration Tolerance*:
Operating Temperature Range:
Output Voltage Level:
Input Voltage Range:
Frequency Stability
vs. Temperature:
vs. Ageing:
vs. Voltage Change:
vs. Load Change:
Current Consumption:
Start-up Time:
Harmonic Distortion:
SSB Phase Noise
At 100Hz offset:
At 1kHz offset:
At 10kHz offset:
Output Format:
Storage Temperature:
EM44U
VEM44U
10k //10pF
10.0MHz to 30.0MHz
True Sinewave
±1ppm at 25°C
See table
0.8V p-p min., 1.0V p-p typ.
+2.8, +3.0, +3.3 or
+5.0Volts DC±5%
See table
±1.0 ppm max. first year
±0.3 ppm max. ±5% change
±0.3 ppm max. ±10% change
2mA max.
2ms typical, 5ms max.
-12dBc typ., -9.0dBc max.
-115dBc
-135dBc
-148dBc
DC block, AC coupled
-55° to +125°C
PART NUMBERING
Example:
EM44GU5-25.000-2.5/-30+75
* Stability over temperature is measured from this initial tolerance.
FREQUENCY STABILITY
Frequency Stability (ppm)
0 ~ +50
-10 ~ +60
Temperature
Range (°C)
-20 ~ +70
-30 ~ +75
-40 ~ +85
±0.5
ASK
x
x
x
x
ASK
±1.0
±1.5
±2.0
±2.5
= available, x = not available, ASK = call Technical Sales
= standard specification
Series Description
TCXO = EM44_U
VCTCXO = VEM44_U
RoHS Status
G = RoHS compliant
Blank = Non-compliant
Supply Voltage
28 = 2.8Volts
3 = 30.Volts
33 = 3.3 Volts
5 = 5.0 Volts
Frequency (MHz)
Temperature Stability
±ppm, see table
Temperature Range
°C, lower and upper limits
VEM44U VOLTAGE CONTROL SPECIFICATION
Control Voltage
Supply = 3.0V:
Supply = 5.0V:
Frequency Deviation Range:
Options:
Slope Polarity = Positive:
Linearity:
+1.5±1.0V
+2.5±2.0V
±8.0ppm min., ±15ppm max.
Narrow: ±1ppm max. (or custom)
Increase of control voltage
increases output frequency.
10% max.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk
www.euroquartz.co.uk
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