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SM77H Series 1.8 V
CMOS Clock Oscillators
April 2007
www.pletronics.com
425-776-1880
2
PART NUMBER:
SM77
45
H
E
X
- 50.0M
-XX
Part Marking:
Packaging code or blank
T250 = 250 per Tape and Reel
T500 = 500 per Tape and Reel
T1K = 1000 per Tape and Reel
PLE SM77
FF.FFF M
C YMDXX
or
PLE SM77
FF.FFF M
C YYWWXX
or
7XYWWXX
FF.FFF M
C PLE XXX
Frequency in MHz
Supply Voltage V
CC
X
= 1.8V +
_ 10%
Optional Enhanced OTR
Blank
= Temp. range -10 to +70oC
E
= Temp. range -40 to +85oC
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
6
7
8
9
0
1
2
Year
2006
2007
2008
2009
2010
2011
2012
Code
A
B
C
D
E
F
G
H
J
K
L
M
Month
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Code
123456789
A
B
C
Day
123456789
10
11
12
Code
D
E
F
G
H
J
K
L
M
N
P
R
Day
13
14
15
16
17
18
19
20
21
22
23
24
Code
T
U
V
W
X
Y
Z
Day
25
26
27
28
29
30
31
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 in
the part number. We will still support part numbers with the ‘S’. For example: SM7745HX and SM7745HSX
describe the same specifications and can be used interchangeably by the customer.
-30
Denoted Output Load other than the standard 15 pF. Data sheets now reflect the specifications at all available
loads so this load designation is no longer needed. We will still support part numbers with this load designation.
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