SM55T Series 5.0 V
CMOS Clock Oscillators
June 2007
Part Number:
SM55
45
T
E
Y*
-75.0M
-XX
Packaging code or blank
T250 = 250 per Tape and Reel
T500 = 500 per Tape and Reel
T1K = 1000 per Tape and Reel
Frequency in MHz
Supply Voltage V
CC
Y
= 5.0V _ 10%
+
(*Y is only included in part number if
Enhanced OTR is not chosen)
Examples: SM5545TE, SM5544TY
Optional Enhanced OTR
Blank
= Temp. range -10 to +70
o
C
E
= Temp. range -40 to +85
o
C
Series Model
Frequency Stability
45
= _ 50 ppm,
44
= _ 25 ppm
+
+
20
= _ 20 ppm
+
Series Model
Marking Legend:
PLE = Pletronics
FF.FFF
M = Frequency in MHz
YYWW or YWW or
YMD
= Date of Manufacture (year and week, or year-month-day)
All other marking is internal factory codes
Specifications such as frequency stability, supply voltage 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.
Codes for Date Code YMD
Code
Year
Code
Month
Code
Day
Code
Day
Code
1
1
D
13
6
2006
A
JAN
2
2
E
14
7
2007
B
FEB
3
3
F
15
8
2008
C
MAR
4
4
G
16
9
2009
D
APR
E
MAY
5
5
H
17
0
2010
F
JUN
6
6
J
18
1
2011
G
JUL
7
7
K
19
H
AUG
8
8
L
20
2
2012
J
SEP
9
9
M
21
K
OCT
A
10
N
22
L
NOV
B
11
P
23
M
DEC
C
12
R
24
Part Marking:
PFF.FFF M
C
YMDxx
or
PFF.FFF M
C
YYWWxx
or
PLE SM55
FF.FFF
M
CYMDxx
or
P5xYWWx
C
FF.FF Mxxx
or
5xYWWxx
FF.FFF
M
CPLE
xxx
T
U
V
W
X
Y
Z
25
26
27
28
29
30
31
Day
Legacy Part Numbers:
‘S’
Denoted Symmetry of 45%/55% at 50% of V
CC
. This is now the standard Duty Cycle and is no longer needed
inthe part number. We will still support part numbers with the ‘S’. For example: SM5545TY and SM5545TS
describe the same specifications and can be used interchangeably by the customer.
-30 or -50
Denoted Output Load other than the standard 15 pF. Data sheets now reflect specifications at all
available loads so this load designation is no longer needed. We’ll still support part numbers with this load
designation.
www.pletronics.com
425-776-1880
2
PLETRONICS [ PLETRONICS, INC. ]
