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參數資料
| 型號： | VEMW44T33-622.08-1.0/-30+75 |
| 廠商： | EUROQUARTZ LTD |
| 元件分類： | XO, clock |
| 英文描述： | TCVCXO, CLOCK, 622.08 MHz, HCMOS OUTPUT |
| 封裝： | MINIATURE, SMD, 4 PIN |
| 文件頁數： | 1/1頁 |
| 文件大小： | 139K |
| 代理商： | VEMW44T33-622.08-1.0/-30+75 |
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, 'W' Group
EMW44T Series
DESCRIPTION
Miniature 11.4 x 9.6 x 4.7mm SMD package
Frequency range: 200.01MHz to 800.0MHz
Supply voltage 3.3 Volts
Frequency stability from ±1ppm over -30 to +75°C
EMW44T series TCXOs are packaged in a 4 pad SMD package 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.
EMW44T - OUTLINES AND DIMENSIONS
Stability (ppm)
±0.5
±1.0
±1.5
±2.0
±2.5
±3.0
Temp.
Range (°C)
0 ~ +50
P
-10 ~ +60
ASK
P
-20 ~ +70
X
P
-30 ~ +75
X
P
-40 ~ +85
X
ASK
P
= available, x = not available, ASK = call Technical Sales
SPECIFICATION
Product Series Code
TCXO:
EMW44T
VCTCXO:
VEMW44T
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:
±3ppm minimum
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:
EMW44T33-409.60-2.5/-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 = EMW44T
VCTCXO = VEMW44T
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
VEMW44T VOLTAGE CONTROL SPECIFICATION
FREQUENCY STABILITY
Offset
10Hz
100Hz
1kHz
10kHz
100kHz
Part =
EMW44T33
at 622.080MHz
(dBc/Hz)
-50
-77
-102
-115
-108
SSB PHASE NOISE at 25°C
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