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參數資料
| 型號： | VEMV44T33-32.768-2.5/-20+70 |
| 廠商： | EUROQUARTZ LTD |
| 元件分類： | XO, clock |
| 英文描述： | TCVCXO, CLOCK, 32.768 MHz, HCMOS OUTPUT |
| 封裝： | MINIATURE, CERAMIC, SMD, 4 PIN |
| 文件頁數： | 1/1頁 |
| 文件大小： | 139K |
| 代理商： | VEMV44T33-32.768-2.5/-20+70 |
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
-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:
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
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