LFXO OSCILLATOR
32.768 kHz
Fast Start-up/High Precision
Miniature Surface Mount Crystal Oscillator
DESCRIPTION
Statek’s 32.768 kHz, surface mount LFXO oscillators,
designed especially for applications requiring fast start-up
and high precision, consist of a Statek miniature AT quartz
crystal and a CMOS/TTL compatible hybrid circuit in a
ceramic package. Each crystal is pre-qualified before
assembly into the oscillator through electrical tests and
characterization over temperature.
For harsh environment applications, Statek provides a high
shock version of the LFXO crystal oscillator.
FEATURES
High precision (±10 ppm)
Fast start-up (0.8ms typ.)
High shock resistance
Tight frequency-temperature stability
Low acceleration sensitivity (HG version)
CMOS output
Optional Output Enable/Disable with Tri-State
Low EMI emission
Full military testing per MIL-PRF-55310
Low jitter
APPLICATIONS
DIMENSIONS
D
2
A
TOP
BOTTOM
3
1
4
D
B
C
E
Military & Aerospace
Smart Munitions
Cockpit Systems
Navigation
Industrial, Computer & Communications
Industrial Controls
Instrumentation
Down-hole Drilling
TYPICAL
DIM
A
B
inches
0.256
0.197
mm
6.50
5.00
1.60
1.70
1.40
1.52
MAXIMUM
inches
0.263
0.204
0.065
0.073
0.065
0.070
mm
6.68
5.18
1.65
1.85
1.65
1.78
0.063
C
(SM1)
C
(SM3/SM5)
0.067
D
E
0.055
0.060
SUGGESTED LAND PATTERN
PIN CONNECTIONS
1. Not connected (N) or Enable (E)
2. Ground
3. Output
4.
V
DD
10191 Rev A
S
YS
TE
M
C
ERT
I
F
I
C
A
T
IO
N
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
IS
O
01
90
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Specifications are typical at 25
O
C unless otherwise noted.
Specifications are subject to change without notice. Tighter
specifications available (contact factory).
Supply Voltage
1
Calibration Tolerance
2
Frequency Stability
Over Temperature
3
Output Load (CMOS)
Aging, first year
Shock
4
Vibration
5
3.3 V ±10% (2.5 V also available)
±10 ppm and up
±10 to ±50 ppm for Commercial
±20 to ±100 ppm for Industrial
±30 to ±100 ppm for Military
15 pF
3 ppm MAX
Std: 5,000 g, 0.3 ms,
½
sine
HG: 20,000 g, 0.3 ms,
½
sine
20 g, 10-2,000 Hz swept sine
Supply Voltage V
DD
Storage Temperature
Maximum Process Temperature
-0.3 V to 5.0 V
-55
O
C to 125
O
C
260
O
C for 20 sec.
ENABLE/DISABLE OPTIONS (E/N)
For the 32.768 kHz fast start-up LFXO, Statek offers two
enable/disable options: E and N. The E-version has a Tri-State
output and stops oscillating internally when the output is put into
the high Z state. The N-version does not have PIN 1 connected
internally and so has no enable/disable capability. The following
table summarizes the Enable/Disable option E.
ENABLE/DISABLE OPTION E
SUMMARY
Enable (Pin 1 High*)
Output
Oscillator
Current
Frequency Output
Oscillates
500 µA
Disable (Pin 1 Low)
High Z State
Stops
3.2 µA
Operating Temp. Range -10
O
C to 70
O
C (Commercial)
-40
O
C to 85
O
C (Industrial)
-55
O
C to 125
O
C (Military)
ELECTRICAL CHARACTERISTICS
6
SYMBOL PARAMETER
MIN
TYP
MAX
UNIT
*
When PIN 1 is allowed to float, it is held high by an internal pull-up resistor.
PACKAGING OPTIONS
V
OH
V
OL
t
startup
t
r
t
f
I
DD
Output Voltage High
Output Voltage Low
Start-up Time
Rise Time (10%-90%)
Fall Time (10%-90%)
Duty Cycle
Supply Current
0.9V
DD
0.8
85
45
45
50
500
1000
1000
55
V
0.1V
DD
V
ms
ns
ns
%
LFXO
- Tray Pack
- 16 mm tape, 7˝ or 13˝ reels
Per EIA 481 (see Tape and Reel datasheet #10109)
µ
A
1. Other supply voltages available. Contact factory for ordering information.
2. Other tolerances available.
3. Does not include calibration tolerance. Tighter tolerances available.
4. Higher shock available. Contact factory.
5. Per MIL-STD-202G, Method 204D, Condition D. Random vibration testing also available.
6. Measurements done at V
DD
= 3.3V
Note: All parameters are measured at ambient temperature with a 10 M!, 15 pF load.
HOW TO ORDER 32.768 kHz LFXO OSCILLATORS/ FAST START-UP
LFXO
AT
HG
4
S
E
SM3
32.768K ,
Frequency
K = kHz
30
Calibration
Tolerance
@ 25
0
C
(in ppm)
/
30
Frequency
Stability over
Temp.Range
(in ppm)
/
/
I
AT = For Fast
Start-up/ High
Precision
HG = High Shock 2 = 2.5V “S” if special or
otherwise leave
4 = 3.3V custom design.
blank.
Blank if Std.
Enable/Disable Termination
Option
Blank = SM1
= Gold Plated
E or N
(Pb Free)
SM3 = Solder Dipped
SM5 = Solder Dipped
(Pb Free)
Temperature Range
C =10
O
C to +70
O
C
I
= -40
O
C to +85
O
C
M = -55
O
C to +125
O
C
S = Customer Specified
OR
/
/
50
Total
Frequency
Tolerance
(in ppm)
/
I
Temperature Range
C = -10
O
C to +70
O
C
I
= -40
O
C to +85
O
C
M = -55
O
C to +125
O
C
S = Customer Specified
10191 Rev A
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
stm32/stm8
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