LFXOTF OSCILLATOR
32.768 kHz
Low Current Consumption
Miniature Surface Mount Crystal Oscillator
DESCRIPTION
Statek’s 32.768 kHz LFXOTF oscillator is designed for
applications requiring low current consumption (as low as
600 nA). It consist of a Statek miniature tuning fork quartz
crystal and a CMOS compatible IC in a ceramic package.
The ceramic packaged crystal used in the LFXOTF oscillator
is pre-qualified before assembly through electrical tests and
characterization over temperature
FEATURES
Ultra-low power
Low aging (double hermetic seal)
CMOS output
Optional output enable/disable with tri-state
Low EMI emission
Full military testing available
High temperature option
APPLICATIONS
DIMENSIONS
Medical
Military & Aerospace
Industrial controls
Instrumentation
TYPICAL
SUGGESTED LAND PATTERN
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
DIM
A
B
inches
0.256
0.197
mm
6.50
5.00
1.60
1.70
1.40
1.52
0.063
C
(SM1)
C
(SM3/SM5)
0.067
D
E
0.055
0.060
PIN CONNECTIONS
1. Not connected (N) or Enable/Disable (T)
2. Ground
3. Output
4.
V
DD
10195 Rev B
S
YS
TEM
C
ERT
I
F
I
C
AT
N
IO
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
O
Specifications are typical at 25 C unless otherwise noted.
Specifications are subject to change without notice.
Supply Voltage
Current Consumption
Calibration Tolerance
2
1
Supply Voltage V
DD
Storage Temperature
Process Temperature
0.5 V to 7 V
-55
O
C to +125
O
C
260
O
C for 20 s
1.8 V to 5 V (
V
DD
)
See Table 1
±10 ppm
±30 ppm
±100 ppm
Follows that of a 32.768 kHz tuning
fork crystal
±1 ppm/year TYP
±3 ppm/year MAX
5,000 g, 0.3 ms,
1/2
sine
20 g, 10 - 2000 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)
+25
O
C to +150
O
C (High Temperature)
TYPICAL CURRENT CONSUMPTION - TABLE 1
V
DD
(V)
1.8
2.5
3.0
3.3
5.0
I
DD
(µA)
No load
0.6
0.8
0.9
1.0
1.7
I
DD
(µA)
15 pF load
1.5
2.0
2.5
2.8
4.5
Frequency Stability
Aging
Shock
Vibration
3
Operating Temperature
Ranges
The current consumption
I
DD
under a capacitive load C
L
is higher than the current
I
0
under no load by
I
DD
=
I
0
+
f
C
L
V
DD
, where
f
= 32.768 kHz.
ENABLE/DISABLE OPTIONS (T/N)
1. Available voltages: 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V at ±10% tolerance.
2. Other tolerances available.
3. Frequency stability over the temperature range based on the formula:
-0.035 ppm/
O
C x(T - 25
O
C)
2
2
ELECTRICAL CHARACTERISTICS
All parameters are measured at ambient temperature with a
10 MΩ and 15 pF load with
V
DD
1.6 V to 5.5 V.
PARAMETER
Output Voltage High
Output Voltage Low
Rise Time (10%-90%)
Fall Time (10%-90%)
Duty Cycle
45
50
MIN
TYP
MAX UNIT
V
0.4
100
100
55
V
ns
ns
%
For the 32.768 kHz LFXOTF, Statek offers two
enable/disable options: T and N. The T-version has a tri-state
output and continues to run internally when the output is put
into the high Z state. So, the T-version offers very fast output
recovery when the oscillator is re-enabled. The N-version
does not have PIN 1 connected internally and so has no
enable/disable capability.
V
DD
- 0.4 V
V
DD
0
HOW TO ORDER 32.768 kHz LFXOTF OSCILLATORS/ULTRA LOW POWER
LFXOTF
4
1 = 1.8V
2 = 2.5V
3 = 3.0V
4 = 3.3V
5 = 5.0V
S
Blank = Standard
S = Special
N
Enable/Disable
Option
T or N
SM5
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)
/
Operating 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
I
10195 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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