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VEM44GT3-FREQ-2.5/-40+85

更新时间：2025-07-11 02:29:59

品牌：EUROQUARTZ

描述：HCMOS Output Clock Oscillator, 1.25MHz Min, 156MHz Max, ROHS COMPLIANT, MINIATURE, CERAMIC, SMD, 4 PIN

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VEM44GT3-FREQ-2.5/-40+85 概述

HCMOS Output Clock Oscillator, 1.25MHz Min, 156MHz Max, ROHS COMPLIANT, MINIATURE, CERAMIC, SMD, 4 PIN

VEM44GT3-FREQ-2.5/-40+85 数据手册

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QUARTZ

EURO

EM44GT Series TCXO

HCMOS, 6 pad SMD, MHz Range

Miniature 11.4 x 9.6 x 4.7mm SMD package

Wide frequency range: 1.25MHz to 156.0MHz

Supply voltage 2.8, 3.0, 3.3 or 5.0 Volts

Frequency stability from ±1ppm over -30 to +75°C

RoHS compliant

EM44GT - OUTLINES AND DIMENSIONS

DESCRIPTION

EM44GT 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:

EM44GT

VCTCXO:

VEM44GT

Frequency Range:

Output Waveform:

Initial Calibration Tolerance:

Standard Frequencies:

1.25MHz to 156.0MHz

Squarewave, HCMOS

<±1.0ppm at +25°±2°C

10.0, 12.8, 13.0, 14.4, 15.36,

16.384, 19.2, 19.440, 19.68,

25.0, 20.0, 27.0, 38.880,

40.0, 77.760, 125.0, 155.520

(Partial list)

Operating Temperature Range:

Frequency Stability

vs. Ageing:

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)

±3ppm minimum

vs. Voltage Change:

vs. Load Change:

vs. Reflow (SMD type):

INPUT VOLTAGE & CURRENT CONSUMPTION

Mechanical Frequency Tuning:

Supply Voltage:

+2.8, +3.0, +3.3 or +5.0V

(See table)

Input Voltage/

Frequency

+2.8V

+3.0

+3.3V

+5.0 V

Output Logic Levels:

Logic High: 90% Vdd min.

Logic Low: 10% Vdd max.

10ns max.

50%±10% standard,

50%±5% option

5ms typical, 10ms max.

See table below

15pF

8.192MHz

10.0MHz

2mA

3mA

2mA

4mA

5mA

7mA

Rise and Fall Times:

Duty Cycle:

77.760MHz

155.520MHz

14mA

26mA

17mA

35mA

32mA

50mA

Start-up Time:

Current Consumption:

Output Load:

Storage Temperature:

-55~+125°C

SSB PHASE NOISE at 25°C

FREQUENCY STABILITY

Offset

10Hz

100Hz

1kHz

10kHz

100kHz

at 10.0Mhz

(dBc/Hz)

-115

-135

-148

-152

-155

Frequency Stability (ppm)

0 ~ +50

±0.5

±1.0

±1.5

±2.0

±2.5

Part =

M44GT33

ASK

at 155.250Mhz

(dBc/Hz)

-72

-110

-125

-132

-125

-10 ~ +60

Temperature

-20 ~ +70

Range (°C)

-30 ~ +75

-40 ~ +85

PART NUMBERING PROCEDURE

P= available, x = not available, ASK = call Technical Sales

Example:

EM44GT33-38.880-2.5/-30+75

Series Description

TCXO = EM44GT

VCTCXO = VEM44GT

VEM44GT 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.)

Supply Voltage

28 = 2.8VDC

3 = 3.0VDC

33 = 3.3 VDC

5 = 5.0 VDC

Frequency Deviation: ±6.0 ppm min. (Vcon = +4.5V±1.0V)

Slope Polarity:

Positive (increase of control voltage increases

output frequency.)

Frequency (MHz)

Stability over OTR (±ppm)

Operating Temperature Range (OTR) (°C)

Lower and upper limits.

Input Impedance:

50k minimum

Modulation Bandwidth: 20kHz minimum

Linearity: ±10% maximum

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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