Datenblatt

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
DIMENSIONS
D
2
A
TOP
3
BOTTOM
1
4
D
B
E
C
APPLICATIONS
Military & Aerospace
Smart Munitions
Cockpit Systems
Navigation
Industrial, Computer & Communications
Industrial Controls
Instrumentation
Down-hole Drilling
SUGGESTED LAND PATTERN
TYPICAL
MAXIMUM
DIM
inches
mm
inches
mm
A
0.256
6.50
0.263
6.68
B
0.197
5.00
0.204
5.18
0.063
C (SM1)
C (SM3/SM5) 0.067
1.60
1.70
0.065
0.073
1.65
1.85
D
0.055
1.40
0.065
1.65
E
0.060
1.52
0.070
1.78
PIN CONNECTIONS
1. Not connected (N) or Enable (E)
2. Ground
3. Output
4. VDD
TEM
C ERT I F I C
AT
IO
S
10191 Rev A
YS
N
IS O
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
90
01
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Specifications are typical at 25OC unless otherwise noted.
Specifications are subject to change without notice. Tighter
specifications available (contact factory).
Supply Voltage VDD
Storage Temperature
Maximum Process Temperature
Supply Voltage1
3.3 V ±10% (2.5 V also available)
Calibration Tolerance
±10 ppm and up
Frequency Stability
±10 to ±50 ppm for Commercial
Over Temperature3
±20 to ±100 ppm for Industrial
2
±30 to ±100 ppm for Military
Output Load (CMOS)
15 pF
Aging, first year
3 ppm MAX
Shock
Std: 5,000 g, 0.3 ms, ½ sine
HG: 20,000 g, 0.3 ms, ½ sine
Vibration5
20 g, 10-2,000 Hz swept sine
4
Operating Temp. Range -10 C to 70 C (Commercial)
-40OC to 85OC (Industrial)
-55OC to 125OC (Military)
O
O
Disable (Pin 1 Low)
Output
Frequency Output
High Z State
Oscillator
Oscillates
Stops
Current
500 µA
3.2 µA
MAX
LFXO
Output Voltage High
0.9VDD
VOL
Output Voltage Low
tstartup
Start-up Time
0.8
tr
Rise Time (10%-90%)
85
1000
ns
tf
Fall Time (10%-90%)
45
1000
ns
50
55
0.1VDD V
45
Enable (Pin 1 High*)
V
VOH
Supply Current
ENABLE/DISABLE OPTION E
SUMMARY
PACKAGING OPTIONS
MIN
Duty Cycle
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.
UNIT
SYMBOL PARAMETER
IDD
ENABLE/DISABLE OPTIONS (E/N)
* When PIN 1 is allowed to float, it is held high by an internal pull-up resistor.
ELECTRICAL CHARACTERISTICS6
TYP
-0.3 V to 5.0 V
-55OC to 125OC
260OC for 20 sec.
- Tray Pack
- 16 mm tape, 7˝ or 13˝ reels
ms
Per EIA 481 (see Tape and Reel datasheet #10109)
%
µA
500
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 VDD = 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
AT = For Fast
Start-up/ High
Precision
HG
4
S
HG = High Shock 2 = 2.5V “S” if special or
otherwise leave
4 = 3.3V custom design.
blank.
Blank if Std.
E
SM3
Enable/Disable Termination
Option
Blank = SM1
= Gold Plated
E or N
(Pb Free)
SM3 = Solder Dipped
SM5 = Solder Dipped
(Pb Free)
32.768K ,
Frequency
K = kHz
30
30
/
Calibration
Tolerance
@ 250C
(in ppm)
/
Frequency
Stability over
Temp.Range
(in ppm)
/
I
Temperature Range
C =10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified
OR
/
/
50
Total
Frequency
Tolerance
(in ppm)
/
I
Temperature Range
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
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
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