R38 Datasheet, PDF (1/1 Pages) Raltron Electronics Corporation – TUNING FORK CRYSTAL UNITS

TUNING FORK CRYSTAL UNITS
FEATURES
DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS
SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY
EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS
SPECIFICATIONS
SERIES R38, R26, AND R145
3 x 8, 2 x 6, 1 x 5 mm
HOLDER TYPE
NOMINAL FREQUENCY
FREQUENCY TOLERANCE
TURNOVER TEMPERATURE
PARABOLIC CURVATURE
CONSTANT (TYP) ††
LOAD CAPACITANCE †††
EQUIVALENT SERIES
RESISTANCE (MAX)
DRIVE LEVEL (TYP)
MOTIONAL CAPACITANCE (TYP)
SHUNT CAPACITANCE (TYP)
CAPACITANCE RATIO (TYP)
AGING (FIRST YEAR MAX)
QUALITY FACTOR (TYP)
INSULATION RESISTANCE (MIN)
OPERATING TEMPERATURE
RANGE
R38
32.768 kHz
±5 ±10 ±20 PPM
25°C ±5°C
-0.034 PPM/C²
6 or 12.5 pF
35k OHM
1.0 µW
0.0035 pF
1.6 pF
460
±3 PPM
90000
500 M OHM
R26
32.768 kHz
±5 ±10 ±20 PPM
25°C ±5°C
R145
32.768 kHz
±5 ±10 ±20 PPM
25°C ±5°C
R38, R26
30.00 kHz TO 153.6 kHz †
±5 ±10 ±20 PPM
25°C ±5°C
-0.034 PPM/C²
-0.034 PPM/C²
-0.034 PPM/C²
6 or 12.5 pF
8.0 pF
6 or 12.5 pF
35k OHM
40k OHM
30k TO 50k OHM
1.0 µW
1.0 µW
0.003 pF
0.0025 pF
1.35 pF
1.0 pF
450
400
±3 PPM
±3 PPM
70000
80000
500 M OHM
500 M OHM
-20°C TO +60°C STANDARD
-40°C TO +85°C EXTENDED
1.0 µW
.001 TO .004 pF
0.8 TO 1.7 pF
425 TO 800
±5 PPM
FREQUENCY-PACKAGE SPECIFIC
500 M OHM
STORAGE TEMPERATURE
RANGE
-40°C TO +85°C
SHOCK RESISTANCE
±5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SURFACE
OR 3000 g x 0.3 ms x ½ SINEWAVE IN 3 AXES
STANDARD PART NUMBER
R38-32.768-12.5
R26-32.768-12.5
R145-32.768-12.5 SEE PART NUMBERING SYSTEM
† COMMON FREQUENCIES ARE: 31.250 kHz, 31.500 kHz, 40.00 kHz, AND 76.800 kHz
†† FREQUENCY DEVIATION AT T IS GIVEN AS: ∆ f/f = K(To - T)², WHERE K IS PARABOLIC CURVATURE CONSTANT
††† OTHER LOAD CAPACITANCES ARE AVAILABLE
OUTLINE DRAWINGS
R145
1.50 MAX
.059 MAX
R26
2.10 MAX
.083 MAX
R38
3.10 MAX
.122 MAX
0.2 DIA
.008 DIA
0.45
.018
0.26 DIA
.010 DIA
0.70
.028
PART NUMBERING SYSTEM
SERIES
R38
R26
R145
FREQUENCY
LOAD
CAPACITANCE
TOLERANCE
EXTENDED
TEMPERATURE
-
-
IN kHz
IN pF
-
-
±5 PPM
EXT
±10 PPM ( ±20 PPM ONLY)
EXAMPLES:
R38-32.768-6-10PPM
R26-32.768-12.5-EXT
0.35 DIA
.014 DIA
1.10
.043
SCALE NONE DIMENSION IN mm/INCH
Raltron Electronics Corporation 10651 NW 19th St. Miami, Florida 33172 U.S.A.
Tel: [phone] Fax: [phone] e-mail: [e-mail] Internet: http://www.raltron.com