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VEM42T5-50.000K-2.5/0+50 PDF预览

VEM42T5-50.000K-2.5/0+50

更新时间: 2024-11-12 10:01:11
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EUROQUARTZ /
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描述
Oscillator,

VEM42T5-50.000K-2.5/0+50 数据手册

  
QUARTZ  
EURO  
EM42T Series  
TCXO  
HCMOS 4 pad SMD, kHz Range  
Miniature 11.4 x 9.6 x 2.5mm SMD package  
Frequency range: 20.0 to 50.0kHz; 32.768kHz  
Supply voltage 3.3 or 5.0 Volts  
Frequency stability from ±1ppm over -30 to +75°C  
EM42T - OUTLINES AND DIMENSIONS  
DESCRIPTION  
EM42T 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.  
SPECIFICATION  
Product Series Code  
TCXO:  
EM42T  
VCTCXO:  
VEM42T  
Frequency Range:  
Output Waveform:  
32.768kHz Standard frequency  
20.0kHz to 50.0kHz  
Squarewave  
Initial Calibration Tolerance  
Models with mech. trimmer: <1.0ppm (at t. 25°±2°C)  
Models without trimmer:  
Operating Temperature Range:  
Frequency Stability  
vs. Ageing:  
<2.0ppm (at t. 25°±2°C)  
See table  
±1.0 ppm max. first year  
±0.3 ppm max. ±5% change  
±0.3 ppm max. ±10% change  
±1ppm max. for one reflow  
(Measured after 24 hours)  
+3.3 or +5.0Volts  
vs. Voltage Change:  
vs. Load Change:  
vs. Reflow:  
Supply Voltage:  
(Specify when ordering)  
Logic High: 90% Vdd min.  
Logic Low: 10% Vdd max.  
10ns max.  
Output Logic Levels:  
Rise and Fall Times:  
Duty Cycle:  
50%±5%  
Start-up Time:  
Current Consumption:  
2ms typical, 5ms max.  
See table below  
Output Load:  
15pF  
Storage Temperature:  
-55~+125°C  
VEM42T 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 STABILITY  
Frequency Deviation: ±6.0 ppm min.  
Slope Polarity:  
Positive (increase of control voltage increases  
output frequency.)  
10k min.  
Frequency Stability (ppm)  
0 ~ +50  
±0.5  
±1.0  
±1.5  
±2.0  
P
±2.5  
P
ASK  
P
P
x
P
P
P
x
Input Impedance:  
Modulation Bandwidth: 3.0kHz min. measured at -3dB  
Linearity: 10% max.  
-10 ~ +60  
x
x
x
x
P
P
Temperature  
-20 ~ +70  
Range (°C)  
P
P
-30 ~ +75  
-40 ~ +85  
x
P
PP  
P
x
x
x
P= available, x = not available, ASK = call Technical Sales  
PART NUMBERING PROCEDURE  
Example:  
EM42T33-32.768k-2.5/-30+75  
CURRENT CONSUMPTION  
Series Description  
TCXO = EM42T  
VCTCXO = VEM42T  
Frequency  
32.768kHz  
50kHz  
+3.3 V  
8.0mA  
12mA  
Supply Voltage  
33 = 3.3 VDC  
5 = 5.0 VDC  
Frequency (kHz)  
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  

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