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: EM42T
Frequency Range: 1.6MHz to 156.0MHz
Output Waveform: Square wave (HCMOS)
Mechanical Frequency Tuning: ±3ppm
Standard Frequencies: 9.6, 10.0, 12.80, 13.0, 14.40,
15.36, 16.384, 19.200,
19.44 and 19.68MHz.
(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: ±1ppm max. for one reflow
(Measured after 24 hours)
Supply Voltage: +2.8 VDC (Code ‘28’)
+3.0 VDC (Code ‘3’)
+3.3 VDC (Code ‘33’)
+5.0 VDC (Code ‘5’)
Output Voltage Levels
Logic ‘1’ HIGH: 80% Vdd min.
Logic ‘0’ LOW: 10% Vdd max.
Rise & Fall Times: 10ns max. (20%~80%)
Duty Cycle (Symmetry): 50%±10% (at 50%Vdd)
Start-up Time: 10ms max.
Current Consumption: 30mA max. (Freq. dependent)
Output Load: 15pF
SSB Phase Noise: See table
Output Format: AC block, DC coupled
Storage Temperature: -50° to +100°C
EM42T - 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
EM42T - TEST CIRCUIT
SSB Phase Noise
at 25°C
Offset
(Hz)
10 100 1k 10k 100k
EM42T
100MHz
(dBc/Hz)
-72 -110 -125 -132 -125
EM42T - PART NUMBERING PROCEDURE
Example: EM42T3-19.44-2.5/-30+75
Series Description
Supply Voltage
28 = 2.8 VDC
3 = 3.0 VDC
33 = 3.3 VDC
5 = 5.0 VDC
Frequency
Stability over OTR (ppm)
Operating Temperature Range (OTR) (°C)
= standard specification
PHASE NOISE (Example: EM42T at 10.0MHz)
SMD package 11.4 x 9.6 x 2.5mm
Wide frequency range: 1.6MHz to 156MHz
Close tolerance stabilities from ±0.5ppm over 0° to +50°C
±1ppm over -40 to +85°C available
Supply voltage 2.8 Volts to 5.0 Volts
HCMOS 11.4 x 9.6 x 2.5mm SMD
EM42T Series
EM42 series TCXOs are packaged in the industry-standard 11.4 x 9.6
x 4.7mm package. Close tolerances are available from ±0.5ppm over
0° to 50°C or ±1ppm over -40° to +85°C. Supply voltage may be
specified over the range 2.8 to 5.0 Volts.