SM8T Series
Miniature SMD Crystal
January 2008
• Pletronics’ SM8T Series is a miniature low
profile surface mount crystal.
• Package is ideal for automated surface mount
assembly and reflow practices.
• Tape and Reel packaging
•
•
•
•
20 MHz to 80 MHZ
1.6 x 2.0 mm 4 pad
AT Cut Fundamental Crystal
Ideal for use in hand held consumer products
Pletronics Inc. certifies this device is in accordance with the
RoHS 6/9 (2002/95/EC) and WEEE (2002/96/EC) directives.
Pletronics Inc. guarantees the device does not contain the following:
Cadmium, Hexavalent Chromium, Lead, Mercury, PBB’s, PBDE’s
Weight of the Device: 0.02 grams
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
-40
-55
160
140
120
100
80
Max
80
150
150
120
100
80
60
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 23 MHZ
to 26 MHZ
to 36 MHz
> 36 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
Deviation (ppm)
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 (
o
C)
Product information is current as of publication date. The product conforms
to specifications per the terms of the Pletronics standard warranty. Production
processsing does not necessarily include testing of all parameters.
Copyright © 2008, Pletronics Inc.
SM8T Series
Miniature SMD Crystal
January 2008
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
H
= 75
o
C
P
= 105
o
C
B
= 45
o
C
o
o
J
= 80 C
R
= 110
o
C
C
= 50 C
K
= 85
o
C
S
= 115
o
C
D
= 55
o
C
L
= 90
o
C
T
= 120
o
C
E
= 60
o
C
M
= 95
o
C
U
= 125
o
C
F
= 65
o
C
Lowest Specified Operating Temperature
A
= +10
o
C
F
= -15
o
C
L
= -40
o
C
G
= -20
o
C
M
= -45
o
C
B
= +5
o
C
H
= -25
o
C
N
= -50
o
C
C
= 0
o
C
o
o
J
= -30 C
P
= -55
o
C
D
= -5 C
K
= -35
o
C
E
= -10
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.
Available Frequency Stability versus Temperature in ppm
Operating
Temperature Range
0 to +45 C
0 to +50 C
0 to +60 C
0 to +70 C
-10 to +50 C
-10 to +60 C
-10 to +75
o
C
-20 to +70 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
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
_
!
!
!
STD
!
!
!
!
J
+ 100
_
!
!
!
!
!
!
!
!
K
+ 150
_
!
!
!
!
!
!
!
!
www.pletronics.com
425-776-1880
2
SM8T Series
Miniature SMD Crystal
January 2008
Marking and Packing Information
The part will be marked
PFFM
YMDx
•
•
•
•
•
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 marking may be mixed on the tape
Traceability of part is lost once removed from reel
Codes for Date Code (Month Year)
Code
Year
Code
Month
6
2006
A
JAN
7
2007
B
FEB
8
2008
C
MAR
9
2009
D
APR
E
MAY
0
2010
F
JUN
1
2011
G
JUL
H
AUG
2
2012
J
SEP
K
OCT
L
NOV
M
DEC
Package Labeling
Label is 1" x 2.6" (25.4mm x 66.7mm)
Font is Courier New
Bar code is 39-Full ASCII
(Label will show SM8T)
Label is 1" x 2.6" (25.4mm x 66.7mm)
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
January 2008
Mechanical:
Inches
A
0.063 + 0.004
_
0.079 + 0.004
_
0.018 _ 0.004
+
0.018
0.004
0.020
0.022
0.028
0.004
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
4
4
1
B
C
D
1
E
1
3
3
2
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
Typical dimensions
Connection (top view):
1
4
Pad 2 and Pad 4 are common and connected
to the metal cover. They are not connected to
the crystal.
2
3
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 optimum performance, pad 2 and/or pad 4 connected to ground.
www.pletronics.com
425-776-1880
4
SM8T Series
Miniature SMD Crystal
January 2008
Reflow Cycle (typical for lead free processing)
Temperature (°C)
250
200
150
100
175°C±10°C
260°C Maximum
10 Seconds Maximum
215°C±10°C
120 to 160 Seconds
Approximately 50 Seconds
Allowed rate of temperature change
Maximum 4°C per second
The part may be reflowed 2 times 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
Microchip MCU
