EURO
QUARTZ
High Temperature Crystal Oscillator
FEATURES
Extended high temperature operation up to 250°C
3.3V or 5.0V supply voltages
Excellent stability over temperature
Fast start-up
CMOS output
Optional Enable/Disable function
Low EMI emission
250° HTXO OSCILLATOR
1.5MHz to 50MHz
Page 1 of 2
OUTLINE & DIMENSIONS
DESCRIPTION
HTXO oscillators are designed to operate at ambient temperatures
<250°C.The rugged design consists of a high-shock crystal and a high
temperature CMOS integrated circuit packaged in a 7.5 x 5.0mm
surface-mount ceramic package.
APPLICATIONS
Oil & gas downhole instrumentation
Rotary shaft sensors
Underground boring tools
Avionics applications
SPECIFICATION
PACKAGING OPTIONS
Frequency Range
1
:
Supply Voltage:
Calibration Tolerance
2
:
Frequency Stability
over Temperature
3
:
Total Tolerance
4
:
Output Load (CMOS):
Start-up Time:
Rise/Fall Time:
Duty Cycle:
Shock, survival
5
:
Vibration, survival
6
:
Operating Temperature Range
7
:
1.5MHz to 50.0MHz
+5.0Volts ±10% or
+3.3Volts ±5%
±100ppm
+250 ppm for 25°C to 250°C
±350ppm for 25°C to 250°C
15pF
5ms max.
10ns max.
40% min., 60% max.
Up to 30,000g, 0.5ms, ½ sine
20g, 10-2000Hz, swept sine
-55° up to 225°C
HTXO oscillators are available either tray packed (<250pcs) or tape
and reel (>250 pieces). 16mm tape, 178mm or 330mm reels per
EIA 418).
SUPPLY CURRENT
Current consumption typically 2mA at 8MHz, 3.3V, 250°C and
CLoad = 10pF
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
High Temperature Crystal Oscillator
250° HTXO OSCILLATOR
1.5MHz to 50MHz
Page 2 of 2
ABSOLUTE MAXIMUM RATINGS
Supply Voltage:
Storage Temperature:
-0.5V to +6.0V (5.V V
DD
)
-55° to +125°C
ENABLE/DISABLE OPTIONS
There are two Enable/Disable options available, T and N. The T-
version has a tri-state output and oscillates internally when the output
is put into the High Z state. The N-version does not have Pin 1
connected internally and has no enable/disable capability. The
following table describes the Enable/Disable option T.
T
Enable (Pin 1 Low)
N
Output:
Frequency Output
Oscillator:
Oscillates
Current:
Normal
Output:
Oscillator:
Current:
High Z state
Stops
Very low
Frequency Output
Oscillates
Normal
N/C
N/C
N/C
Disable (Pin 1 High)
HOW TO ORDER HTXO SMD CRYSTAL OSCILLATORS
HTXO 4
Supply Voltage
4 = 3.3V
5 = 5.0V
B
Shock Level
A = 5,000g
B = 10,000g
C = 20,000g
D = 30,000g
S
T
Enable/Disable
option T or N
-
SM5 -
20.0M /
Frequency
M = MHz
-
/
-
/ 500
Total
Frequency
Tolerance
(In ppm)
/
Q
Termination
Blank = SM1= Gold plated
SM5 = Solder dipped
(SM1 and SM5 are pB free)
Blank = standard
S = special or
custom
Temp. Range
Q = +25° to +225°C
W = +25dC to 250°C
S = Customer
specified temp.
range
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
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