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, 14 pin DIL, MHz Range

EM15T Series

DESCRIPTION

14 pin DIL industry-standard package with trimmer

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

EM15T series TCXOs are packaged in the industry-standard 14 pin

DIL 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.

EM15T - OUTLINES AND DIMENSIONS

SPECIFICATION

Product Series Code

TCXO:

EM15T

VCTCXO:

VEM15T

Frequency Range:

1.25MHz to 156.0MHz

Output Waveform:

Squarewave, HCMOS

Initial Calibration Tolerance:

<±1.0ppm at +25°±2°C

Standard Frequencies:

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:

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 (SMD type):

±1.0ppm max. for one reflow

(Measured after 24 hours)

Mechanical Frequency Tuning:

±3ppm minimum

Supply Voltage:

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

(See table)

Output Logic Levels:

Logic High: 90% Vdd min.

Logic Low: 10% Vdd max.

Rise and Fall Times:

10ns max.

Duty Cycle:

50%±10% standard,

50%±5% option

Start-up Time:

5ms typical, 10ms max.

Current Consumption:

See table below

Output Load:

15pF

Storage Temperature:

-55~+125°C

PART NUMBERING SCHEDULE

Example:

EM15T33-38.880-2.5/-30+75

Supply Voltage

28 = 2.8VDC

3 = 3.0VDC

33 = 3.3 VDC

5 = 5.0 VDC

Frequency (MHz)

Stability over OTR (±ppm)

Operating Temperature Range (OTR) (°C)

Lower and upper limits.

Series Description

TCXO = EM15T

VCTCXO = VEM15T

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:

50k

minimum

Modulation Bandwidth: 20kHz minimum

Linearity:

±10% maximum

VEM15T VOLTAGE CONTROL SPECIFICATION

Offset

10Hz

100Hz

1kHz

10kHz

100kHz

Part =

EM15T33

at 10.0Mhz

(dBc/Hz)

-115

-135

-148

-152

-155

at 155.250Mhz

(dBc/Hz)

-72

-110

-125

-132

-125

SSB PHASE NOISE at 25°C

Input Voltage/

Frequency

+2.8V

+3.0

+3.3V

+5.0 V

8.192MHz

2mA

2mA

5mA

10.0MHz

3mA

4mA

7mA

77.760MHz

14mA

17mA

32mA

155.520MHz

26mA

35mA

50mA

INPUT VOLTAGE & CURRENT CONSUMPTION

Frequency Stability (ppm)

±0.5

±1.0

±1.5

±2.0

±2.5

Temperature

Range (°C)

0 ~ +50

ASK

P

P

P

P

-10 ~ +60

x

P

P

P

P

-20 ~ +70

x

x

P

P

P

-30 ~ +75

x

x

x

P

-40 ~ +85

x

x

x

x

P

P

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

FREQUENCY STABILITY