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參數資料
| 型號： | VEM44T5-FREQ-1.5/-10+60 |
| 廠商： | EUROQUARTZ LTD |
| 元件分類： | TCVCXO, clock |
| 英文描述： | TCVCXO, CLOCK, 0.02 MHz - 0.05 MHz, HCMOS OUTPUT |
| 封裝： | MINIATURE, CERAMIC, SMD, 4 PIN |
| 文件頁數： | 1/1頁 |
| 文件大小： | 118K |
| 代理商： | VEM44T5-FREQ-1.5/-10+60 |
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
EM44T Series
DESCRIPTION
Miniature 11.4 x 9.6 x 4.7mm 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
EM44T 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.
EM44T - OUTLINES AND DIMENSIONS
FREQUENCY STABILITY
Frequency
+3.3 V
32.768kHz
8.0mA
50kHz
12mA
CURRENT CONSUMPTION
SPECIFICATION
Product Series Code
TCXO:
EM44T
VCTCXO:
VEM44T
Frequency Range:
32.768kHz Standard frequency
20.0kHz to 50.0kHz
Output Waveform:
Squarewave
Initial Calibration Tolerance
Models with mech. trimmer: <1.0ppm (at t. 25°±2°C)
Models without trimmer:
<2.0ppm (at t. 25°±2°C)
Operating Temperature Range:
See table
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:
±1ppm max. for one reflow
(Measured after 24 hours)
Supply Voltage:
+3.3 or +5.0Volts
(Specify when ordering)
Output Logic Levels:
Logic High: 90% Vdd min.
Logic Low: 10% Vdd max.
Rise and Fall Times:
10ns max.
Duty Cycle:
50%±5%
Start-up Time:
2ms typical, 5ms max.
Current Consumption:
See table below
Output Load:
15pF
Storage Temperature:
-55~+125°C
PART NUMBERING PROCEDURE
Example:
EM44T33-32.768k-2.5/-30+75
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.
Series Description
TCXO = EM44T
VCTCXO = VEM44T
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.
Slope Polarity:
Positive (increase of control voltage increases
output frequency.)
Input Impedance:
10k
min.
Modulation Bandwidth: 3.0kHz min. measured at -3dB
Linearity:
10% max.
VEM44T VOLTAGE CONTROL SPECIFICATION
HCMOS 4 pad SMD, kHz Range
Frequency Stability (ppm)
±0.5
±1.0
±1.5
±2.0
±2.5
Temperature
Range (°C)
0 ~ +50
ASK
P
-10 ~ +60
x
P
-20 ~ +70
x
P
-30 ~ +75
x
P
PP
-40 ~ +85
x
P
= available, x = not available, ASK = call Technical Sales
FREQUENCY STABILITY
相關PDF資料 |
PDF描述 |
|---|---|
| VEM44T5-FREQ-2.0/-20+70 | TCVCXO, CLOCK, 0.02 MHz - 0.05 MHz, HCMOS OUTPUT |
| VEM64T28-1.25-1.0/-10+60 | TCVCXO, CLOCK, 1.25 MHz, HCMOS OUTPUT |
| VEM15T33-32.768K-1.0/0+50 | TCVCXO, CLOCK, 0.032768 MHz, HCMOS OUTPUT |
| VEM15T33-32.768K-2.0/0+50 | TCVCXO, CLOCK, 0.032768 MHz, HCMOS OUTPUT |
| VEM15T33-32.768K-2.5/-20+70 | TCVCXO, CLOCK, 0.032768 MHz, HCMOS OUTPUT |
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