SM55 Series
Miniature SMD Crystal
January 2009
160
140
120
100
80
AT Cut Crystal Frequency
versus Temperature
Typical Performance:
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-60
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Part Marking:
1xFFFFFPymdz or L1xFFFFzywwz
Legend:
1
= Model code for SM55
x
= Capacitance load code from below
= Frequency coded
= Pletronics
FFFFF
P or L
ymd or yww = Date of Manufacture (year, month and day) or year, week week
All other marking is internal factory codes
Some frequency marking examples: 3.579545M = 03579, 14.31818M = 14181, 24.0M = 24000
Specifications such as frequency tolerance and operating temperature range, etc. are not identified
from the marking. External packaging labels and packing list will correctly identify the ordered
Pletronics part number.
Code
A
B
C
D
8
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
U
V
W
X
Y
pF 10 12 13
15 18 20 22 24 26 28 30 32 34 36 27 series 33 50 19 16 17 14
Codes for Date Code YMD
Code
6
7
8
9
0
1
2
2006
2007
2008
2009
2010
2011
2012
Year
Code
Month
A
B
C
D
E
F
G
H
J
K
L
M
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Code
1
1
2
2
3
3
F
4
4
5
6
7
8
8
9
9
A
10
N
B
11
P
C
12
R
Day
Code
Day
5
H
6
J
7
D
E
G
16
W
28
K
L
M
21
13
T
14
U
15
V
17
X
18
Y
19
Z
20
22
23
24
Code
Day
25
26
27
29
30
31
www.pletronics.com
425-776-1880
2
PLETRONICS [ PLETRONICS, INC. ]
