Datenblatt

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
DIMENSIONS
APPLICATIONS
Medical
Military & Aerospace
Industrial controls
Instrumentation
TYPICAL
SUGGESTED LAND PATTERN
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/Disable (T)
2. Ground
3. Output
4. VDD
IS O
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
90
01
TEM
C ERT I F I C
AT
N
IO
S
10195 Rev B
YS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Specifications are typical at 25OC unless otherwise noted.
Specifications are subject to change without notice.
Supply Voltage VDD
Storage Temperature
Process Temperature
1
Supply Voltage
Current Consumption
1.8 V to 5 V (VDD)
See Table 1
2
Calibration Tolerance
3
0.5 V to 7 V
-55O C to +125O C
260O C for 20 s
TYPICAL CURRENT CONSUMPTION - TABLE 1
±10 ppm
±30 ppm
±100 ppm
VDD (V)
Frequency Stability
Follows that of a 32.768 kHz tuning
fork crystal
Aging
Shock
±1 ppm/year TYP
±3 ppm/year MAX
5,000 g, 0.3 ms, 1/2 sine
Vibration
20 g, 10 - 2000 Hz swept sine
Operating Temperature
Ranges
-10OC to +70OC (Commercial)
-40OC to +85OC (Industrial)
-55OC to +125OC (Military)
+25OC to +150OC (High Temperature)
IDD (µA)
IDD (µA)
No load
15 pF load
1.8
0.6
1.5
2.5
0.8
2.0
3.0
0.9
2.5
3.3
1.0
2.8
5.0
1.7
4.5
The current consumption IDD under a capacitive load CL is higher than the current I0
under no load by IDD = I0 + f CL VDD, 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:
2
2
-0.035 ppm/OC x(T - 25OC)
ELECTRICAL CHARACTERISTICS
All parameters are measured at ambient temperature with a
10 MΩ and 15 pF load with VDD 1.6 V to 5.5 V.
PARAMETER
MIN
Output Voltage High
Output Voltage Low
TYP
VDD - 0.4 V
VDD
0
Rise Time (10%-90%)
Fall Time (10%-90%)
Duty Cycle
45
50
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.
MAX UNIT
V
0.4
V
100
ns
100
ns
55
%
HOW TO ORDER 32.768 kHz LFXOTF OSCILLATORS/ULTRA LOW POWER
LFXOTF
4
S
N
SM5
1 = 1.8V
2 = 2.5V
3 = 3.0V
4 = 3.3V
5 = 5.0V
Blank = Standard
S = Special
Enable/Disable
Option
T 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)
/
I
Operating Temperature Range
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified
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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