Data Sheet

QUARTZ
STRATUM III OSCILLATORS
OUTLINES AND DIMENSIONS
EQAX-20
TCXO with STRATUM III
Long-term stability option
DESCRIPTION
The Euroquartz EQAX-20 TCXO conforms to IEC60679-1, Stratum 3,
providing a low-noise, highly-stable and reliable source of clock signals.
FEATURES
·
Compact, SMD package
Frequency range from 10Mhz to 20MHz
Operating temperature range, -20° to +70°C
Operable temperature -30° to +75°C
Supply Voltage 3.3 Volts
SPECIFICATION
Frequency Range:
Standard Frequencies:
Frequency Stability
Initial Tolerance:
Vs. Temperature:
Vs. Supply Voltage Var:
Vs. Load Change:
Long Term Ageing (1st Year):
Long Term Stab. (15 Years):
Frequency Adjustment Range
Electronic Frequency Control
EFC Voltage Vc:
EFC Slope:
EFC Input Impedance:
Absolute Pull Range:
RF Output
Signal Waveform:
Load:
Symmetry (Duty Cycle):
Start-up Time:
Supply Voltage:
Current Consumption:
Operable Temperature Range:
Storage Temperature Range:
Enclosure:
9Mhz to 33Mhz
10, 12.8, 16.384, 19.44MHz
±1ppm @25°C
±2.5ppm -40°~+85°C
±1.5ppm -20°~+70°C
-0.8ppm 0°~+50°C
±0.2ppm
±0.2ppm
±1ppm (@40°C)
±4.6ppm
±5ppm
0.25~+4.5V (Option II = ‘50’
0.30~+3.0V (Option II = ‘33)
Positive
10k Ohms
PAD CONNECTIONS
Pad
No.
1
2
4`
5
Symbol
VC
GND
RF OUT
Vs
Function
Voltage Control
Ground
RF Output
Supply Voltage
ENVIRONMENTAL
Test
Visual inspection,
Dimensions
Sealing tests
IEC 60068
Part . .
IEC 61178-1
Clause . .
Test Conditions
2-17
4.5
4.6
4.8.2
Solderability,
Resistance to
soldering heat
Shock
2-20
4.8.3
2-27
4.8.8
Bump
2-29
4.8.6
Free fall
2-32
4.8.9
To order, specify as follows:
Vibration,
Sinsoidal
2-6
4.8.7
FREQUENCY-MODEL-OPTION I-OPTION II-OPTION III
Rapid change of
Temperature
2-14
4.8.5
Dry heat
2-2
4.8.11
Damp heat, cyclic
2-30
4.8.12
Cold
2-1
4.8.13
Climatic sequence
1-7
4.8.14
Damp heat, steady
state
Endurance tests,
- ageing
- extended ageing
2-3
4.8.15
Enclosure styles as in
IEC 60122-3, if applic.
Gross Leak: Test Qc
Fine Leak: Test Qk
Test Ta (235±5°C),
method 1 Test Tb,
method 1A, 5s
Test Ea, 3x per axis
100g, 6ms 1/2sine
Test Eb, 4000 bumps/
axis, 40g, 6ms
Test Ed, procedure 1,
2 drops from 1m ht.
Test Fc, 30 min/axis,
10Hz-55Hz, 0.75mm;
55Hz -2kHz, 10g
Test Na, 10 cycles at
extremes of operating
temperature range.
Test Ba, 16 h at upper
temperature.
Test Db variant 1
severity b, 55°C/95%rh
Test Aa, 2h at lower
temperature indicated
by climatic category.
Sequence of 4.8.11,
4.8.12 and 4.8.13
Test Ca, 56 days
4.9.1
4.9.2
30 days @ 85°C
1kh, 2kh, 8kh, @85°C
HCMOS
15pF
60%/40%
4 ms
+5.0V±5%/+3.3V±5%
25mA maximum (@25°C)
-40°~+85°C
-40°~+85°C
As drawing
ORDERING CODE
EXAMPLE:
12.800MHz EQAX-20-25-50-46
OPTION I - Tolerance vs Temperature
25 = ±2.5ppm -40°~+85°C
15 = ±1.5ppm -20°~+70°C
08 = 0.8ppm 0°~+50°C
OPTION II - EFC Voltage
50 = 0.25V~4.75V
33 = 0.30V~3.0V
OPTION III - Long Term Stability
46 = ±4.6ppm overall, 15 years
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 1460 230000 Fax: +44 1460 230001 email: [email protected] web: www.euroquartz.co.uk
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