Datenblatt

32.768 kHz
CXO3M OSCILLATOR
High Stability/Fast Start-up Crystal Oscillator
DESCRIPTION
For those applications requiring a 32.768 kHz oscillator with high
frequency stability over temperature or fast start-up, Statek offers
the AT-crystal based 32.768 kHz CXO3M oscillator. A frequency
stability of ±20 ppm over -40OC to +85OC is possible, compared to
hundreds of parts-per-million for tuning-fork based 32.768 kHz oscillators. Whereas tuning-fork based oscillators start in hundreds
of milliseconds, Statek’s 32.768 kHz CXO3M oscillators start in
0.8 ms (typically).
FEATURES
High frequency stability over temperature
Fast start-up
DIMENSIONS
High shock resistance
Surface mount
CMOS and TTL compatible
Optional Output Enable/Disable with Tri-State
Low EMI emission
Hermetically sealed ceramic package
Full military testing available
APPLICATIONS
Military / Avionics
Aircraft landing gear
Avionics
Smart Munitions
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
0.051
C (SM1)
C (SM3/SM5) 0.055
1.30
1.40
0.055
0.063
1.40
1.60
D
0.055
1.40
0.065
1.65
E
0.060
1.52
0.070
1.78
PIN CONNECTIONS
1.
2.
3.
4.
Enable/Disable (E) or No connection (N)
Ground
Output
VDD
inches (mm)
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10167 Rev B
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Specifications are typical at 25 C unless otherwise noted.
Specifications are subject to change without notice. Tighter
specifications available (contact factory).
O
Supply Voltage1
3.3 V ±10%
Calibration Tolerance2
±100 ppm
Frequency Stability
Over Temperature3
±10 to ±50 ppm for Commercial
±20 to ±100 ppm for Industrial
±30 to ±100 ppm for Military
Output Load (CMOS)
15 pF
Aging, first year
10 ppm MAX
Shock
Std: 3,000 g, 0.3 ms, ½ sine
HG: 10,000 g, 0.3 ms, ½ sine
Vibration4
20 g, 10-2,000 Hz swept sine
Operating Temp. Range
-10OC to 70OC (Commercial)
-40OC to 85OC (Industrial)
-55OC to 125OC (Military)
MIN
VOH
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
%
Supply Current
I
DD
TYP
MAX
UNIT
V
0.1VDD V
45
-0.3 V to 5.0 V
-55OC to 125OC
260OC for 20 sec.
ENABLE/DISABLE OPTIONS (E/N)
SYMBOL PARAMETER
Duty Cycle
Supply Voltage VDD
Storage Temperature
Maximum Process Temperature
500
ms
For the 32.768 kHz CXO3M, 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*)
Disable (Pin 1 Low)
Output
Frequency Output
High Z State
Oscillator
Oscillates
Stops
Current
500 µA
3.2 µA
* When PIN 1 is allowed to float, it is held high by an internal pull-up resistor.
PACKAGING OPTIONS
CXO3M - Tray Pack
- 16 mm tape, 7˝ or 13˝ reels
Per EIA 481 (see Tape and Reel datasheet #10109)
µA
1. Other supply voltages available. Contact factory for ordering information.
2. Other tolerances available.
3. Does not include calibration tolerance. Other tolerances available.
4. Per MIL-STD-202G, Method 204D, Condition D. Random vibration testing also available.
Note: All parameters are measured at ambient temperature with a 10 M!, 15 pF load.
HOW TO ORDER 3.3 V 32.768 kHz CXO3M OSCILLATORS
CXO3M
HG = High Shock
Blank=Standard
S
E
SM3
“S” if special or
custom design.
Blank if Std.
Enable/Disable
Option
E or N
Termination
Blank = SM1
= Gold Plated
(Pb Free)
SM3 = Solder Dipped
SM5 = Solder Dipped
(Pb Free)
32.768K ,
Frequency
K = kHz
30
Calibration
Tolerance
@ 250C
(in ppm)
/
30
/
I
/
Frequency
Stability over
Temp.Range
(in ppm)
Temperature Range
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified
OR
/
/
50
/
I
Total Fre- Temperature Range
quency Tol- C = -10OC to +70OC
erance
I = -40OC to +85OC
(in ppm)
M = -55OC to +125OC
S = Customer Specified
10167 Rev B
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
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