SM8T Series
Miniature SMD Crystal
August 2016
• Pletronics’ SM8T Series is a m iniature low
profile surface m ount crystal.
• Package is ideal for autom ated surface m ount
assem bly and reflow practices.
• Tape and Reel packaging
•
•
•
•
20 MHz to 80 MHZ
1.6 x 2.0 m m 4 pad
AT Cut Fundam ental Crystal
Ideal for use in hand held consum er products
Pletronics Inc. certifies this device is in accordance with the
RoHS 6/9 (2011/65/EC) and WEEE (2002/96/EC) directives.
Pletronics Inc. guarantees the device does not contain the following:
Cadm ium , Hexavalent Chrom ium , Lead, Mercury, PBB’s, PBDE’s
W eight of the Device: 0.02 gram s
Moisture Sensitivity Level: 1 As defined in J-STD-020C
Second Level Interconnect code: e4
Electrical Specification
:
Item
Frequency Range
Calibration Frequency Tolerance
Frequency Stability
Equivalent Series Resistance
(ESR)
Min
20
50
50
-
-
-
-
Drive Level
Shunt Capacitance
Aging at 25
o
C + 3
o
C
_
(C0)
-
-
-5
-2
Operating Temperature Range
Storage Temperature Range
AT Cut Crystal Frequency
versus Temperature
Typical Performance:
-40
-55
Max
80
150
150
100
80
60
50
100
5
+5
+2
+125
+125
Unit
MHZ
ppm
ppm
Ohms
Ohms
Ohms
Ohms
µW
pF
ppm /Yr
ppm /Yr
o
Condition
at +25
o
C + 3
o
C, see part number for options
_
see part number for available options
to 24 MHZ
to 26 MHZ
to 40 MHz
to 80 MHz
use 10 µW for testing
Pad to Pad capacitance
for the first year at +25
o
C + 3
o
C
_
after the first year at +25
o
C + 3
o
C
_
see part number for available specified
tolerance range options
C
C
o
P roduct inform ation is current as of publication date. T he product conform s
to specifications per the term s of the P letronics standard warranty. Production
processsing does not necessarily include testing of all param eters.
Copyright © 2008, Pletronics Inc.
SM8T Series
Miniature SMD Crystal
August 2016
Part Number:
SM8T
-8
-25.0M
-50
H
1
G G
-XX
See chart below for available options
Internal code or blank
Highest Specified Operating Temperature
A
= 40
o
C
G
= 70
o
C
N
= 100
o
C
o
o
B
= 45 C
H
= 75 C
P
= 105
o
C
C
= 50
o
C
J
= 80
o
C
R
= 110
o
C
D
= 55
o
C
K
= 85
o
C
S
= 115
o
C
E
= 60
o
C
L
= 90
o
C
T
= 120
o
C
o
o
F
= 65 C
M
= 95 C
U
= 125
o
C
Lowest Specified Operating Temperature
A
= +10
o
C
F
= -15
o
C
L
= -40
o
C
B
= +5
o
C
G
= -20
o
C
M
= -45
o
C
C
= 0
o
C
H
= -25
o
C
N
= -50
o
C
o
o
D
= -5 C
J
= -30 C
P
= -55
o
C
E
= -10
o
C
K
= -35
o
C
Fundamental mode AT cut crystal
Frequency Stability
See chart below
Calibration Frequency Tolerance
(Typ. Values shown)
20
= + 20 ppm at 25
o
C + 3
o
C
_
_
o
50
= + 50 ppm at 25 C + 3
o
C (Standard)
_
_
Frequency in MHZ
Cload in pF
Parallel Resonance from
06
to
32
pF, 8 pF is standard
-or-
SR
= Series Resonance
Model Number
Current production ranges are shown below.
A vailable Frequency Stability versus Tem perature in ppm
O perating
T em perature Range
0 to +45
o
C
0 to +50 C
0 to +60 C
0 to +70 C
-10 to +50 C
-10 to +60 C
-10 to +75 C
-20 to +70
o
C
-20 to +75 C
-30 to +75 C
-30 to +80 C
-30 to +85 C
-35 to +80 C
-40 to +85 C
o
o
o
o
o
o
o
o
o
o
o
o
A
CODE
CB
CC
CE
CG
EC
EE
EH
GG
GH
JH
JJ
JK
KJ
LK
+ 3.0
_
B
+ 5.0
_
C
+ 8.0
_
D
+ 10
_
E
+ 15
_
F
+ 20
_
G
+ 30
_
H
+ 50
_
J
+ 100
_
K
+ 150
_
!
!
!
S TD
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
www.pletronics.com
425-776-1880
2
SM8T Series
Miniature SMD Crystal
August 2016
Marking and Packing Information
The part will be m arked
PFFM
YM Dx
•
•
•
•
•
Marking consists of the frequency “FF” which will be truncated to the first two digits due to package size.
Date code consists of Year, Month and Day (see codes below)
The x is an internal PLE production code
Orientation of m arking m ay be m ixed on the tape
Traceability of part is lost once rem oved from reel
Codes for Date Code YM D
Code
2
3
4
2012
2013
2014
Year
Code
Month
Code
Day
Code
Day
Code
Day
1
1
D
13
T
25
A
JAN
2
2
E
14
U
26
B
FEB
3
3
F
15
V
27
C
MAR
4
4
G
16
W
28
5
2015
D
APR
E
MAY
5
5
H
17
X
29
6
2016
F
JUN
6
6
J
18
Y
30
7
2017
G
JUL
7
7
K
19
Z
31
H
AUG
8
8
L
20
8
2018
J
SEP
9
9
M
21
K
OCT
A
10
N
22
L
NOV
B
11
P
23
M
DEC
C
12
R
24
Package Labeling
Label is 1" x 2.6" (25.4m m x 66.7m m )
Font is Courier New
Bar code is 39-Full ASCII
(Label will show SM8T)
Label is 1" x 2.6" (25.4m m x 66.7m m )
Font is Arial
Reliability: Environmental Compliance
Parameter
Mechanical Shock
Vibration
Solderability
Thermal Shock
Condition
MIL-STD-883 Method 2002, Condition B
MIL-STD-883 Method 2007, Condition A
MIL-STD-883 Method 2003
MIL-STD-883 Method 1011, Condition A
www.pletronics.com
425-776-1880
3
SM8T Series
Miniature SMD Crystal
August 2016
Mechanical:
Inches
A
B
C
D
1
E
1
F
1
G
1
H
1
Contacts :
Gold 11.8 µinches 0.3 µm minimum over
Nickel 50 to 350 µinches 1.27 to 8.89 µm
J
1
Not to Scale
1
mm
1.6 + 0.1
_
2.0 + 0.1
_
0.45 + 0.1
_
0.45
0.1
0.5
0.55
0.7
0.1
0.063 + 0.004
_
0.079 + 0.004
_
0.018 + 0.004
_
0.018
0.004
0.020
0.022
0.028
0.004
Typical dimensions
Connection (top view):
Pad 2 and Pad 4 are com m on and connected
to the m etal cover. They are not connected to
the crystal.
Layout and application information
• Trace lengths to the crystal should be kept as short as possible.
• The crystal connections are sensitive to noise.
• The package should be grounded for optim um perform ance, pad 2 and/or pad 4 connected to ground.
www.pletronics.com
425-776-1880
4
SM8T Series
Miniature SMD Crystal
August 2016
Reflow Cycle (typical for lead free processing)
The part m ay be reflowed 2 tim es without degradation.
Tape and Reel: available for quantities of 250 to 3000 per reel
(<1000 will be cut tape)
Constant Dimensions Table 1
Tape
Size
8mm
12mm
16mm
24mm
1.5
+0.1
-0.0
D1
Min
1.0
1.5
1.5
1.5
1.75
_0.1
+
4.0
0.6
_
+0.1
2.0
_0.1
+
0.25
0.1
S1
Min
T
Max
T1
Max
D0
E1
P0
P2
2.0
_
+0.05
Variable Dimensions Table 2
Tape
Size
8 mm
B1
Max
3.5
E2 Min
F
P1
T2
Max
1.0
W
Max
8.9
Ao, Bo &
Ko
Note 1
Not to scale
6.4
1.7 _0.1
+
4.0 _0.1
+
Note 1: Embossed cavity to conform to EIA-481-B
Dimensions in mm
REEL DIMENSIONS
A
inches
mm
B
inches
mm
C
D
mm
mm
8.4
+2.0
-0.0
7.0
177.8
2.50
63.5
10.0
254.0
4.00
101.6
13.0 +0.5 / -0.2
8.4
+2.0
-0.0
8.4
+2.0
-0.0
8.0
13.0
330.2
3.75
95.3
Tape
Width
Reel dimensions may vary from the above
www.pletronics.com
425-776-1880
5
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