XT38P Datasheet, PDF (1/1 Pages) Vishay Siliconix – Miniature SMD Watch Crystal

XT38P
Vishay Dale
Miniature SMD Watch Crystal
The XT38P is a 2.5 mm height plastic molded 32.768 KHz
SMD crystal unit. This thermoplastic molded rugged part is
perfect for your SMD applications in limited circuit space
using the watch frequency.
FEATURES
• 2.5 mm height
• Industry standard footprint
• Long term stability
• Tape and reel, 3000 pcs
• 100 % Lead (Pb)-free and RoHS compliant
RoHS
COMPLIANT
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Frequency Range
Frequency Tolerance
Frequency Coefficient
Operating Temperature Range
Storing Temperature Range
Shunt Capacitance
Motional Capacitance
Load Capacitance
Insulation Resistance
Drive Level
Aging (first year)
Equivalent Series Resistance(ESR)
SYMBOL
F_O
∆F/F_O
K
T_OPR
T_STG
C_O
C₁
CL
IR
DL
Fa
Rs
CONDITION
at 25 °C
parabolic coefficient
at 25 °C ± 3 °C
UNIT
KHz
ppm
ppm/°C²
°C
°C
pF
fF
pF
MΩ
µW
ppm
KΩ
MIN
-20
-0.027
-40
-55
500
TYPICAL
32.768
-0.035
1.0
2.0
12.5
±3.0
MAX
+20
-0.043
+85
+125
1.0
50
DIMENSIONS in inches [millimeters]
XT38PA
0.343 [8.7] Max.
PARABOLIC TEMPERATURE CURVE
TEMPERATURE (°C)
- 20 - 10 0
10 20 30 40
50 60 70
0.020 ± 0.04
[0.5 ± 0.1]
0.098
[2.5]
Max.
0.45 ± 0.08
[1.15 ± 0.2]
0.217 ± 0.04
[5.5 ± 0.1]
0.45 ± 0.08
[1.15 ± 0.2]
#1
#4
#2
0.146
[3.7]
Max.
#3
ORDERING INFORMATION
XT38P
A
32.768 KHz
MODEL PAD LAYOUT FREQUENCY/KHz
e6
JEDEC Lead
(Pb)-Free
STANDARD
GLOBAL PART NUMBER
- 10
- 20
- 30
- 40
- 50
- 60
∆F/f(ppm)
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)
X
T
3
8
P
A
A
3
2
K
7
6
8
MODEL
PAD PACKAGE
LAYOUT CODE
FREQUENCY
www.vishay.com
8
For technical questions contact: [e-mail]
Document Number: 35022
Revision: 17-Jun-05