SM7T Series
Miniature SMD Crystal
November 2018
• Pletronics’ SM7T 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
•
•
•
•
26 MHz to 60 MHz
1.25 x 1.6 x 0.32 m m 4 pad
AT Cut Fundam ental Crystal
Ideal for use in hand held consum er products
Bluetooth, W LAN
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: 0.005 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
26
-
±5
-
Max
60
±20
±15
200
100
-
-
-
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:
-30
-55
80
60
50
100
4
+5
+2
+85
+125
Unit
MHz
ppm
ppm
Ohms
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 26 MHz
to 28 MHz
to 37 MHz
to 47 MHz
> 48 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 © 2018, Pletronics Inc.
SM7T Series
Miniature SMD Crystal
November 2018
Part Number:
SM7T
-8
-25.0M
-20
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 (Standard)
+
+
o
50
= _ 50 ppm at 25 C _ 3
o
C
+
+
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
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www.pletronics.com
425-776-1880
2
SM7T Series
Miniature SMD Crystal
November 2018
Marking and Packing Information
The part will be m arked
PFFM
YM Dx
Or
FFYM x
•
•
•
•
•
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 or 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
4
5
6
2014
2016
Year
2015
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
7
2017
D
APR
E
MAY
5
5
H
17
X
29
8
2018
F
JUN
6
6
J
18
Y
30
9
2019
G
JUL
7
7
K
19
Z
31
H
AUG
8
8
L
20
0
2020
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 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
www.pletronics.com
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
425-776-1880
3
SM7T Series
Miniature SMD Crystal
November 2018
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
Pad 1 or Pad 2 shall have the pad chamfered.
J
1
Not to Scale
K
1
1
mm
1.25 _ 0.05
+
1.6 + 0.05
_
0.35 max
0.45
0.05
0.25
0.55
0.4
0.05
0.12
0.049 _ 0.002
+
0.063 _ 0.002
+
0.014 max
0.018
0.002
0.010
0.022
0.016
0.002
0.005
Typical dimensions
Connection (top view):
Pad 2 is connected to the m etal cover
Pad 4 has no connection
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 connected to ground.
These very sm all crystals have high ESR, the oscillator start-up and operation should take this into
consideration.
• These sm all crystals should have their m axim um drive level lim ited to 100uW .
www.pletronics.com
425-776-1880
4
SM7T Series
Miniature SMD Crystal
November 2018
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
