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
DESCRIPTION
SPECIFICATION
Product Series Code: EM42S
Frequency Range: 9.6MHz to 26.0MHz
Output Waveform: Clipped sine wave
Initial Calibration Tolerance*: ±3ppm at 25°C
Standard Frequencies: 9.6, 10.0, 12.80, 13.0, 14.40,
15.36, 16.384, 19.2, 19.440,
and 19.680MHz.
Operating Temperature Range: See table
Frequency Stability: See table
Over Operating Temperature range:
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)
Input Voltage Range: +2.6 VDC to +6.0 VDC
3.0V and 5.0V are standard
Output Voltage Level
+3.0V supply: 0.8V p-p minimum
+5.0V supply: 1.0V p-p minimum
Current Consumption: See table
Output Load: 10k Ohms//15pF
Harmonic Distortion: -10dB typical, -7dB maximum
Output Format: DC block, AC coupled
Storage Temperature: -40°C to +85°C
EM42S - OUTLINES AND DIMENSIONS
Frequency Stability (ppm) ±0.5 ±1.0 ±1.5 ±2.0 ±2.5
Temperature
Range (°C)
0 ~ +50
-10 ~ +60 ASK
-20 ~ +70 x
-30 ~ +75 x
-40 ~ +85 x
= available, x = not available, ASK = call Technical Sales
FREQUENCY STABILITY
EM42S - TEST CIRCUIT
EM42S - PART NUMBERING PROCEDURE
Example: EM42S3-19.44-2.5/-30+75
Series Description
Supply Voltage
3 = 3.0 VDC
5 = 5.0 VDC
(specify other)
Frequency MHz
Stability over OTR (ppm)
Operating Temperature Range (OTR) (°C)
= standard specification
Frequency Range +3.0 V +5.0 V
9.6MHz to 13MHz 1.3mA 2.0mA
13.1MHz to 20MHz 1.5mA 2.2mA
20.1MHz to 26MHz 2.0mA 2.5mA
CURRENT CONSUMPTION
SSB Phase Noise
at 25°C
(EM42S 13MHz)
Offset (Hz) 10 100 1k 10k 100k
dBc/Hz -72 -110 -125 -132 -125
TYPICAL PHASE NOISE
EM42S series TCXOs are packaged in the industry-standard 11.4 x
9.6 x 2.5mm package. With clipped sinewave output, close tolerances
are available from ±0.5ppm over 0° to 50°C or ±1ppm over -40° to
+85°C. The part has very low power consumption.
Clipped Sinewave 11.4 x 9.6 x 2.5mm SMD
EM42S Series
SMD package 11.4 x 9.6 x 2.5mm
Wide frequency range: 9.6MHz to 26MHz
Close tolerance stabilities from ±0.5ppm over 0° to +50°C
±1ppm over -40 to +85°C also available
Supply voltage 2.8 Volts to 5.0 Volts