EURO
QUARTZ
Miniature 11.4 x 9.6 x 4.7mm SMD package
Wide frequency range: 27.0MHz to 200.0MHz
Supply voltage 3.3 Volts
Frequency stability from ±1ppm over -30 to +75°C
EMV44T Series TCXO
HCMOS 4 pad SMD, 'V' Group
EMV44T - OUTLINES AND DIMENSIONS
DESCRIPTION
EMV44T series TCXOs are packaged in a miniature 4 pad ceramic
SMD package. With squarewave (CMOS) output, tolerances are
available from ±1.0ppm over -30° to +75°C. The part has a 0.01mF
decoupling capacitor built in.
SPECIFICATION
Product Series Code
TCXO:
VCTCXO:
Frequency Range:
Output Waveform:
Initial Calibration Tolerance
Models without trimmer:
Models with trimmer:
Standard Frequencies:
EMV44T
VEMV44T
27.0MHz to 200.0MHz
Squarewave, HCMOS
<±2.0ppm
<±1.0ppm
30.0, 32.768, 38.880, 40.0,
50.0, 54.0, 64.0, 65.536,
77.76, 80.0, 128.0, 160.0
and 200.0MHz
(Partial
list)
See table
±3.0ppm minimum
±1.0 ppm max. first year
±0.3 ppm max. ±5% change
±0.3 ppm max. ±10% change
±1.0ppm max. for one reflow
(Measured
after 24 hours)
+3.3 Volts
Logic High: 90% Vdd min.
Logic Low: 10% Vdd max.
40mA maximum
10ns typical
50%±10% standard,
5ms typical, 10ms max.
See table below
15pF
-55~+125°C
Operating Temperature Range:
Mechanical Frequency Tuning:
Frequency Stability
vs. Ageing:
vs. Voltage Change:
vs. Load Change:
vs. Reflow (SMD type):
Supply Voltage:
Output Logic Levels:
Current Consumption:
Rise and Fall Times:
Duty Cycle:
Start-up Time:
Current Consumption:
Output Load:
Storage Temperature:
VEMV44T VOLTAGE CONTROL SPECIFICATION
Standard = +1.5±1.0Volts for all input
voltages.
(Contact technical sales if
+2.5±2.0 Volts is required.)
Frequency Deviation: ±6.0 ppm min. (Vcon = +4.5V±1.0V)
Slope Polarity:
Positive
(increase of control voltage increases
output frequency.)
Input Impedance:
2M minimum
Modulation Bandwidth: 25kHz minimum
Linearity:
±10% maximum
Control Voltage:
SSB PHASE NOISE at 25°C
FREQUENCY STABILITY
Stability (ppm)
0 ~ +50
-10 ~ +60
Temp.
Range (°C)
-20 ~ +70
-30 ~ +75
-40 ~ +85
P
±0.5
P
ASK
X
X
X
±1.0
P
P
P
P
X
±1.5
P
P
P
P
X
±2.0
P
P
P
P
ASK
±2.5
P
P
P
P
ASK
±3.0
P
P
P
P
P
Part =
EMV44T33
Offset
at 77.760Mhz
(dBc/Hz)
at 155.520Mhz
(dBc/Hz)
10Hz
-80
-80
100Hz
-110
-110
1kHz
-135
-125
10kHz
-130
-120
100kHz
-132
-125
PART NUMBERING SCHEDULE
Example:
EMV44T33-200.00-2.5/-30+75
= available, x = not available, ASK = call Technical Sales
Series Description
TCXO = EMV44T
VCTCXO = VEMV44T
Supply Voltage
33 = 3.3 VDC
Frequency (MHz)
Stability over OTR (±ppm)
Operating Temperature Range (OTR) (°C)
Lower and upper limits
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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