Data Sheet

EURO QUARTZ
EMW38GT TCXO
CMOS 14 pin DIL compatible, 'W' Group
Through-hole package compatible with 14 pin DIL
Frequency range: 200.01MHz to 800.0MHz
Supply voltage 3.3 Volts
Frequency stability from ±1ppm over -30 to +75°C
RoHS compliant
200.0MHz to 800.0MHz
EMW38GT - OUTLINES AND DIMENSIONS
DESCRIPTION
EMW38GT series TCXOs are packaged in a through-hole package,
pin compatible with 14 pin DIL with trimmer. 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:
Standard Frequencies:
EMW38GT
VEMW38GT
200.01MHz to 800.0MHz
Squarewave, HCMOS
<±2.0ppm at +25°±2°C
200.0, 204.8, 311.04, 400.0,
409.6 and 622.08MHz
(Partial list)
±3ppm minimum
(see table)
(see table)
±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.
65mA max. (Freq. dependant)
1.2ns typical
50%±5%
5ms typical, 10ms max.
See table below
15pF
-55~+125°C
Mechanical Frequency Tuning:
Operating Temperature Range:
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:
VEMW38GT VOLTAGE CONTROL SPECIFICATION
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
SSB PHASE NOISE at 25°C
Offset
FREQUENCY STABILITY
Stability (ppm)
Temp.
Range (°C)
P
±0.5
±1.0
±1.5
±2.0
±2.5
±3.0
0 ~ +50
P
P
P
P
P
P
-10 ~ +60
ASK
P
P
P
P
P
-20 ~ +70
X
P
P
P
P
P
-30 ~ +75
X
P
P
P
P
P
-40 ~ +85
X
X
X
ASK
ASK
P
= available, x = not available, ASK = call Technical Sales
Part =
EMW38GT33
10Hz
100Hz
1kHz
10kHz
100kHz
-50
-77
-102
-115
-108
at 622.080MHz
(dBc/Hz)
PART NUMBERING SCHEDULE
Example:
EMW38GT33-409.60-2.5/-30+75
Series Description
TCXO = EMW38GT*
VCTCXO = VEMW38GT
Supply Voltage
33 = 3.3 VDC
Frequency (MHz)
Stability over OTR (±ppm)
Operating Temperature Range (OTR) (°C)
Lower and upper limits
*Note: 'G' indicates part is RoHS compliant
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk
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