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
EMW14T Series
DESCRIPTION
14 pin DIL, hermetically-sealed package
Frequency range: 200.01MHz to 800.0MHz
Supply voltage 3.3 Volts
Frequency stability from ±1ppm over -30 to +75°C
EMW14T series TCXOs are packaged in a standard 14 pin DIL
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.
EMW14T - 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: EMW14T
VCTCXO: VEMW14T
Frequency Range: 200.01MHz to 800.0MHz
Output Waveform: Squarewave, HCMOS
Initial Calibration Tolerance: <±2.0ppm at +25°±2°C
Standard Frequencies: 200.0, 204.8, 311.04, 400.0,
409.6 and 622.08MHz
(Partial list)
Mechanical Frequency Tuning: Not implemented
Operating Temperature Range: (see table)
Frequency Stability (see table)
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: 65mA max. (Freq. dependant)
Rise and Fall Times: 1.2ns typical
Duty Cycle: 50%±5%
Start-up Time: 5ms typical, 10ms max.
Current Consumption: See table below
Output Load: 15pF
Storage Temperature: -55~+125°C
PART NUMBERING SCHEDULE
Example:
EMW14T33-409.60-2.5/-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 = EMW14T
VCTCXO = VEMW14T
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
VEMW14T VOLTAGE CONTROL SPECIFICATION
FREQUENCY STABILITY
Offset 10Hz 100Hz 1kHz 10kHz 100kHz
Part =
EMW14T33
at 622.080MHz
(dBc/Hz)
-50 -77 -102 -115 -108
SSB PHASE NOISE at 25°C
HCMOS 14 pin DIL, 'W' Group
