EURO
QUARTZ
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
TCXO
HCMOS 4 pad SMD, 'V' Group
EMV44T Series
DESCRIPTION
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 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.
EMV44T - OUTLINES AND DIMENSIONS
Stability (ppm) ±0.5 ±1.0 ±1.5 ±2.0 ±2.5 ±3.0
Temp.
Range (°C)
0 ~ +50 P P P P P P
-10 ~ +60 ASK P P P P P
-20 ~ +70 XP P P P P
-30 ~ +75 XP P P PP
-40 ~ +85 X X X ASK ASK P
P = available, x = not available, ASK = call Technical Sales
SPECIFICATION
Product Series Code
TCXO: EMV44T
VCTCXO: VEMV44T
Frequency Range: 27.0MHz to 200.0MHz
Output Waveform: Squarewave, HCMOS
Initial Calibration Tolerance
Models without trimmer: <±2.0ppm
Models with trimmer: <±1.0ppm
Standard Frequencies: 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: See table
Mechanical Frequency Tuning: ±3.0ppm minimum
Frequency Stability
vs. Ageing: ±1.0 ppm max. first year
vs. Voltage Change: ±0.3 ppm max. ±5% change
vs. Load Change: ±0.3 ppm max. ±10% change
vs. Reflow (SMD type): ±1.0ppm max. for one reflow
(Measured after 24 hours)
Supply Voltage: +3.3 Volts
Output Logic Levels: Logic High: 90% Vdd min.
Logic Low: 10% Vdd max.
Current Consumption: 40mA maximum
Rise and Fall Times: 10ns typical
Duty Cycle: 50%±10% standard,
Start-up Time: 5ms typical, 10ms max.
Current Consumption: See table below
Output Load: 15pF
Storage Temperature: -55~+125°C
PART NUMBERING SCHEDULE
Example:
EMV44T33-200.00-2.5/-30+75
Supply Voltage
33 = 3.3 VDC
Frequency (MHz)
Stability over OTR (±ppm)
Operating Temperature Range (OTR) (°C)
Lower and upper limits
Series Description
TCXO = EMV44T
VCTCXO = VEMV44T
Control Voltage: 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
VEMV44T VOLTAGE CONTROL SPECIFICATION
FREQUENCY STABILITY
Offset 10Hz 100Hz 1kHz 10kHz 100kHz
Part =
EMV44T33
at 77.760Mhz
(dBc/Hz)
-80 -110 -135 -130 -132
at 155.520Mhz
(dBc/Hz)
-80 -110 -125 -120 -125
SSB PHASE NOISE at 25°C
