EURO
QUARTZ
8 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
EMW8T Series TCXO
HCMOS 8 pin DIL, 'W' Group
EMW8T - OUTLINES AND DIMENSIONS
DESCRIPTION
EMW8T series TCXOs are packaged in a standard 8 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.
SPECIFICATION
Product Series Code
TCXO:
VCTCXO:
Frequency Range:
Output Waveform:
Initial Calibration Tolerance:
Standard Frequencies:
EMW8T
VEMW8T
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)
Not implemented
(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:
VEMW8T 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
Offset
10Hz
-50
100Hz
-77
1kHz
-102
10kHz
-115
100kHz
-108
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 =
EMW8T33
at 622.080MHz
(dBc/Hz)
PART NUMBERING SCHEDULE
Example:
EMW8T33-409.60-2.5/-30+75
= available, x = not available, ASK = call Technical Sales
Series Description
TCXO = EMW8T
VCTCXO = VEMW8T
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
