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

EM9GT Series

DESCRIPTION

Package 8 pin DIL, with trimmer

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

RoHS compliant

EM9GT series TCXOs are packaged in a miniature 6 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.

EM9GT - OUTLINES AND DIMENSIONS

FREQUENCY STABILITY

Frequency

+3.3 V

32.768kHz

8.0mA

50kHz

12mA

CURRENT CONSUMPTION

SPECIFICATION

Product Series Code

TCXO:

EM9GT

VCTCXO:

VEM9GT

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:

EM9GT33-32.768k-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 = EM9GT

VCTCXO = VEM9GT

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.

VEM9GT VOLTAGE CONTROL SPECIFICATION

HCMOS 8 pin DIL, kHz Range

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