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 -40
O
C to +85
O
C is possible, compared to
hundreds of parts-per-million for tuning-fork based 32.768 kHz os-
cillators. 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
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
DIMENSIONS
Military / Avionics
Aircraft landing gear
Avionics
Smart Munitions
SUGGESTED LAND PATTERN
TYPICAL
DIM
A
B
inches
0.256
0.197
mm
6.50
5.00
1.30
1.40
1.40
1.52
MAXIMUM
inches
0.263
0.204
0.055
0.063
0.065
0.070
mm
6.68
5.18
1.40
1.60
1.65
1.78
0.051
C
(SM1)
C
(SM3/SM5)
0.055
D
E
0.055
0.060
PIN CONNECTIONS
1.
2.
3.
4.
Enable/Disable (E) or No connection (N)
Ground
Output
V
DD
inches (mm)
10167 Rev B
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
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
Vibration
4
Operating Temp. Range
3.3 V ±10%
±100 ppm
±10 to ±50 ppm for Commercial
±20 to ±100 ppm for Industrial
±30 to ±100 ppm for Military
15 pF
10 ppm MAX
Std: 3,000 g, 0.3 ms,
½
sine
HG: 10,000 g, 0.3 ms,
½
sine
20 g, 10-2,000 Hz swept sine
-10
O
C to 70
O
C (Commercial)
-40
O
C to 85
O
C (Industrial)
-55
O
C to 125
O
C (Military)
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 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*)
Output
Oscillator
Current
Frequency Output
Oscillates
500 µA
Disable (Pin 1 Low)
High Z State
Stops
3.2 µA
SYMBOL PARAMETER
MIN
TYP
MAX
UNIT
V
OH
V
OL
t
startup
t
r
t
f
I
Output Voltage High
Output Voltage Low
Start-up Time
Rise Time (10%-90%)
Fall Time (10%-90%)
Duty Cycle
0.9V
DD
0.8
85
45
45
50
500
1000
1000
55
V
0.1V
DD
V
ms
ns
ns
%
*
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)
DD
Supply Current
µ
A
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
“S” if special or
custom design.
Blank if Std.
E
Enable/Disable
Option
E or N
SM3
Termination
Blank = SM1
= Gold Plated
(Pb Free)
SM3 = Solder Dipped
SM5 = Solder Dipped
(Pb Free)
32.768K ,
Frequency
K = kHz
30
Calibration
Tolerance
@ 25
0
C
(in ppm)
/
30
/
/
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
Frequency
Stability over
Temp.Range
(in ppm)
OR
/
/
50
/
I
Total Fre- Temperature Range
quency Tol- C = -10
O
C to +70
O
C
erance
I
= -40
O
C to +85
O
C
(in ppm)
M = -55
O
C to +125
O
C
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
ST - Low Power RF
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