SURFACE MOUNT TUNING FORK CRYSTAL UNIT
FEATURES
SERIES RSE B AND C
SUITABLE FOR TIME OF DAY CLOCK APPLICATIONS
LOW FREQUENCY RANGE
EXCELLENT FOR AUTOMATIC AND HIGH DENSITY SURFACE MOUNTING
SPECIFICATIONS
NOMINAL FREQUENCY
FREQUENCY TOLERANCE
TURNOVER TEMPERATURE
TEMPERATURE COEFFICIENT
LOAD CAPACITANCE
EQUIVALENT SERIES
RESISTANCE (ESR)
DRIVE LEVEL
SHUNT CAPACITANCE
AGING (FIRST YEAR)
OPERATING TEMPERATURE
RANGE
STORAGE TEMPERATURE
RANGE
SHOCK RESISTANCE
SOLDER REFLOW CONDITIONS
32.768 KHz
24.00 TO 350.00 KHz 351.00 KHz TO 615.00 KHz
±20 PPM MAXIMUM (±50 PPM AND ±100 PPM AVAILABLE)
±25°C ±5°C
±25°C ±8°C
±25°C ±15°C
(-0.035 ± 0.008) PPM/°C²
6.0 TO 12.5 pF
50 K OHM MAXIMUM
50 K OHM MAXIMUM
1.0 µW MAXIMUM
0.95 pF TYPICAL
±5 PPM MAXIMUM
-40°C TO +85°C
-55°C TO +125°C
±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
230 °C MAXIMUM FOR 20 s MAXIMUM
20 K OHM MAXIMUM
1.0 pF TYPICAL
0.9 pF TYPICAL
.6
07
.024
0.6
.2
08
0.7
40
.6
.160
PIN 1
3.56
.4
10
2.54
.100
2.54
.100
0.51
.020
2.29
.090
0.51
.020
0.6
.024
5.5
.217
PIN 4
0.6
.024
1.4
.055
1.4
.055
PIN 3
PIN 4
PIN 1
PIN 3
PIN 2
.9
09
2.5
MARKING
AREA
9.40
.370
10.41
.410
.2
04
0.6
.4
18
37
.
RSE B
3
2.7
.106
RSE C
PIN 1
MARKING
AREA
8.7
.343
PIN 2
2.7
.106
5.0
.197
PIN 2
SOLDER PAD LAYOUT
0.7
4.8
0.7
.028
.189
.028
SOLDER PAD LAYOUT
.6
03
16
.
PIN 4
PIN 3
1.7
PIN 4
PIN 3
.6
03
1.6
OUTLINE DRAWINGS
LEAD CONNECTION
Scale none Dimensio n in
mm
inch
PIN 1
PIN 2
LEAD CONNECTION
Scale none Dimensio n in
mm
inch
REFLOW SOLDERING PROFILE
230 °C
TEMPERATURE
CARRIER TAPE DIMENSIONS
1.75
.069
7.5
.295
.630
H
16
15 - 20 s
CAVITY HEIGHT “H”
RSE “B” = 4.0 mm / .157 in
RSE “C” = 3.0 mm / .118 in
REFLOW
1.5 DIA
.06 DIA
2.0 ± 0.05
.079 ± .002
4.0 ± 0.1
.16 ± .004
COOLING
150 °C
PREHEATING
25 °C
30 - 40 s
TIME (SECONDS)
4.4 ± 0.1
.170 ± .004
8.0 ± 0.1
.315 ± .004
FREQUENCY VS. TEMPERATURE CURVE
-10
0
25
60
TEMP
(°C)
PACKAGING
330mm REEL DIAMETER
16mm TAPE WIDTH, 8mm PITCH
QUANTITY: RSE B 2000 PIECES PER REEL
RSE C 3000 PIECES PER REEL
PART NUMBERING SYSTEM
-50
HOLDER
TYPE
-
RSE
FREQUENCY
-
IN KHz
LOAD
CAPACITANCE
-
6 OR 12.5 pF
CIRCUIT
TYPE
B
C
-
TAPE AND REEL
T
∆
f / f o(ppm)
EXAMPLE: RSE-32.768-12.5-B-T
Raltron Electronics • 10400 NW 33
rd
Street • Miami, Florida 33172 • U.S.A.
Tel: 305-593-6033 Fax: 305-594-3973 e-mail: sales@raltron.com Internet: www.raltron.com
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