QUARTZ
EURO
TCXO
EMV44T Series
HCMOS 4 pad SMD, 'V' Group
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 - 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:
EMV44T
VCTCXO:
VEMV44T
Frequency Range:
Output Waveform:
27.0MHz to 200.0MHz
Squarewave, HCMOS
Initial Calibration Tolerance
Models without trimmer:
Models with trimmer:
Standard Frequencies:
<±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)
Operating Temperature Range:
Mechanical Frequency Tuning:
Frequency Stability
See table
±3.0ppm minimum
vs. Ageing:
vs. Voltage Change:
vs. Load Change:
±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
vs. Reflow (SMD type):
VEMV44T VOLTAGE CONTROL SPECIFICATION
Supply Voltage:
Control Voltage:
Standard = +1.5±1.0Volts for all input
voltages. (Contact technical sales if
+2.5±2.0 Volts is required.)
Output Logic Levels:
Logic High: 90% Vdd min.
Logic Low: 10% Vdd max.
40mA maximum
Current Consumption:
Rise and Fall Times:
Duty Cycle:
Start-up Time:
Current Consumption:
Output Load:
Frequency Deviation: ±6.0 ppm min. (Vcon = +4.5V±1.0V)
Slope Polarity:
10ns typical
Positive (increase of control voltage increases
output frequency.)
2M minimum
50%±10% standard,
5ms typical, 10ms max.
See table below
15pF
-55~+125°C
Input Impedance:
Modulation Bandwidth: 25kHz minimum
Linearity: ±10% maximum
Storage Temperature:
SSB PHASE NOISE at 25°C
Offset
10Hz
100Hz
1kHz
10kHz
100kHz
FREQUENCY STABILITY
at 77.760Mhz
(dBc/Hz)
-80
-110
-135
-130
-132
Stability (ppm)
±0.5
±1.0
±1.5
±2.0
±2.5
±3.0
Part =
EMV44T33
at 155.520Mhz
(dBc/Hz)
-80
-110
-125
-120
-125
0 ~ +50
P
ASK
X
P
P
P
P
X
P
P
P
P
X
P
P
P
P
P
P
P
P
P
-10 ~ +60
-20 ~ +70
-30 ~ +75
-40 ~ +85
Temp.
P
P
P
Range (°C)
PART NUMBERING SCHEDULE
X
P
Example:
EMV44T33-200.00-2.5/-30+75
X
ASK
ASK
Series Description
TCXO = EMV44T
VCTCXO = VEMV44T
P = available, x = not available, ASK = call Technical Sales
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