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
EURO
QUARTZ
CMOS, 14 pin DIL, MHz Range
EM14GT TCXO
DESCRIPTION
14 pin DIL industry-standard 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
EM14GT 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.
EM14GT - OUTLINES AND DIMENSIONS
SPECIFICATION
Product Series Code
TCXO: EM14GT
VCTCXO: VEM14GT
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:
EM14GT33-38.880-2.5/-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 = EM14GT
VCTCXO = VEM14GT
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
VEM14GT VOLTAGE CONTROL SPECIFICATION
Offset 10Hz 100Hz 1kHz 10kHz 100kHz
Part =
EM14GT33
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 xP P P P
-20 ~ +70 x x P P P
-30 ~ +75 x x x P PP
-40 ~ +85 x x x x P
P = available, x = not available, ASK = call Technical Sales
FREQUENCY STABILITY
1.25MHz to 156.0MHz