SM55T Series 5.0 V
CMOS Clock Oscillators
June 2007
Part Number:
SM55 45
T
E
Y* -75.0M -XX
Packaging code or blank
Part Marking:
T250 = 250 per Tape and Reel
T500 = 500 per Tape and Reel
T1K = 1000 per Tape and Reel
PFF.FFF M
C YMDxx
or
Frequency in MHz
PFF.FFF M
C YYWWxx
or
PLE SM55
FF.FFF M
CYMDxx
or
P5xYWWx
C FF.FF Mxxx
or
Supply Voltage VCC
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 +70oC
E = Temp. range -40 to +85oC
Series Model
5xYWWxx
FF.FFF M
CPLE xxx
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
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
5
6
6
7
8
8
9
9
A
10
N
B
11
P
C
12
R
4
5
H
7
K
Day
Code
Day
D
E
G
16
W
28
J
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
Legacy Part Numbers:
‘S’ Denoted Symmetry of 45%/55% at 50% of VCC. 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. ]
