Document Number: 35040
For technical questions contact: frequency@vishay.com
www.vishay.com
Revision: 17-Jun-05
9
Surface Mount Watch Crystal
XT32P
Vishay Dale
FEATURES
Low profile
Industry standard footprint
Long term stability
Tape and reel, 2000pcs
100 % Lead (Pb)-free and RoHS compliant
DIMENSIONS in inches [millimeters]
PARABOLIC TEMPERATURE CURVE
To determine frequency stability, use parabolic curvature (k).
For example: What is stability at 45 C?
1) Change in Temperature (C) = 45 - 25 = 20 C
2) Change in Frequency = - 0.042 ppm*(
C)
= - 0.042 ppm*(20)
2
= - 16.8 ppm(max)
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
CONDITION
UNIT
MIN
TYPICAL
MAX
Frequency Range
F
O
KHz
32.768
Frequency Tolerance
F/F
O
at 25 C
ppm
-20
+20
Frequency Coefficient
K
parabolic coefficient
ppm/C
2
-0.027
-0.035
-0.043
Operating Temperature Range
T
OPR
C
-40
+85
Storing Temperature Range
T
STG
C
-55
+125
Shunt Capacitance
C
O
pF
1.0
Motional Capacitance
C
1
fF
2.0
4
Load Capacitance
CL
pF
12.5
Insulation Resistance
IR
M
500
Drive Level
DL
W
1.0
Aging (first year)
Fa
at 25 C 3 C
ppm
3.0
Equivalent Series Resistance(ESR)
Rs
K
50
ORDERING INFORMATION
XT32P
MODEL
A
PAD LAYOUT
A or B
32.768 KHz
FREQUENCY
/KHz
e6
JEDEC Lead (Pb)-
Free
STANDARD
0.410 [10.41] Max.
0.370 [9.40]
0.140 [3.56]
Max.
0.160
[4.06]
Max.
0.100
[2.54]
0.100
[2.54]
#1
#2
#4
#3
0.090
[2.29]
0.020 [0.51]
0.020 [0.51]
0.100
[2.54]
0.100
[2.54]
#1
#2
#4
#3
XT32PB
XT32PA
- 20
- 10
0
10
20
30
40
50
60
70
- 10
- 20
- 30
- 40
- 50
- 60
F/f(ppm)
TEMPERATURE (
C)
- 20
- 10
0
10
20
30
40
50
60
70
- 10
- 20
- 30
- 40
- 50
- 60
F/f(ppm)
TEMPERATURE (
C)
GLOBAL PART NUMBER
MODEL
PAD
PACKAGE
FREQUENCY
LAYOUT
CODE
X
T
3
2
P
A
2
K
7
6
8
A
3
The XT32P is a cylinder type watch crystal molded in a
thermoplastic housing capable of withstanding soldering
re-flow processing. The XT32P is perfect for your SMD
applications using the 32.768 KHz frequency. We offer two
different footprints of the part to satisfy various pattern layout
requirements.
RoHS
COMPLIANT
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