Designing and manufacturing innovative frequency control devices since 1927
Miniature, Surface Mount Watch Crystals
SM37
M
SM38
M
SM39
Monitor Products’ SM37, SM38 and SM39 are miniature crystals in highly reliable packages specifically designed for
surface mount applications. Hermetically-sealed construction ensures long-term stability and aging characteristics.
ELECTRICAL SPECIFICATIONS
Nominal Frequency
Calibration Tolerance
Temperature Stability
Series Resistance
Load Capacitance
Motional Capacitance
Shunt Capacitance
Drive Level
Quality Factor
Operating Temperature
Aging (1st year)
32.768 KHz
!
20 ppm @ 251C
Parabolic Coefficient -0.04 max ppm/(✁
1C)
2
max
50.0 K✡ max
12.5 pF typical, 6pF to infinity available
.003 fF typical
1.35 pF typical
1
✙
W max
50,000 min
-40 to 851C
!
3 ppm max, 251C
!
31C
FEATURES
M
Ideal for use with high-
density circuit boards
M
Surface mount
M
Plastic package
M
Reflow solderable
M
Tape and reel
APPLICATIONS
M
M
M
M
M
M
Systems clock
Communication equipment
Computer applications
Disk drives
Cameras
Measuring instruments
SM37
Units : mm
Packaging: Tape & Reel (2000 pcs/reel) or Bulk (< 2000 pcs)
SM38
Units : mm
Packaging: Tape & Reel (2000 pcs/reel) or Bulk (< 2000 pcs)
SM39
Monitor Products has a proven
track record as a pioneer
manufacturer in the frequency
control market. If our extensive
selection of standard and
engineered crystals and
oscillators does not meet your
spec, we will work with you
towards a customized solution.
Packaging: Tape & Reel (3000 pcs/reel) or Bulk (< 3000 pcs)
Monitor Products Company Inc reserves the right to make changes to its products and product specifications without notice. No liability is assumed as a result of their use or application.
02-19-03
502 VIA DEL MONTE, OCEANSIDE, CA 92054
TEL:
760.433.4510
FAX:
760.434.0255
SM37
M
SM38
M
SM39
ENVIRONMENTAL PERFORMANCE SPECIFICATIONS
Operating Temperature Range
Storage Temperature Range
Vibration
Shock
Humidity
Hermetic Seal
Reflow Solderability
Solderability
Insulation Resistance
Packaging
-401C~851C
-551C~1251C
MIL-STD-202 Method 35G,
85% RH, 851C, 48 Hours
Leak Rate 2 x 10
-8
ATM-cm
3
/sec max (inner package only)
2601C, 10 secs max
MIL-STD-202 Method 208E
500 M✡ min @ 100 VDC
Tape & Reel (SM37 & SM38= 2000pcs/reel; SM39 = 3000pcs/reel) or Bulk
50 to 2000 Hz
MIL-STD-202 Method 213B Test Cond E, 1000G, 1/2 Sine Wave
Units : mm
A
SM37
SM38
SM39
1.5
1.5
B
8.0
8.0
C
D
E
F
G
H
QTY
4.0 16.0 1.75 7.5
4.0 16.0 1.75 7.5
3.9 11.0 2000 / reel
2.7
8.7 3000 / reel
TAPE DIMENSIONS
REEL DIMENSIONS
PART
NUMBERING
KEY
SERIES
CORRELATION
MODE
FREQUENCY
TOLERANCE
TEMPERATURE
RANGE
PACKAGING
A = Bulk
SM37/SM38: <2000 pcs
SM39:<3000 pcs
FREQUENCY
(KHz)
SM37
SM38
SM39
L = 12.5pf*
P = 6.0pf
X = Cust Spec
1 = Fundamental*
B=
C=
D=
H=
100ppm*
50ppm
30ppm
20ppm
SM37/SM38: 2000 pcs/reel
SM39: 3000 pcs/reel
E = Tape & Reel*
Sample Part Numbers:
SM37L1C5A @
32.768 KHz
SM38L1B5A @
32.768 KHz
SM39L1C7E @
32.768 KHz
* Standard
3 = -201C ~ 701C
5 = -401C ~ 851C
7 = -101C ~ 601C*
=
=
=
SM37
SM38
SM39
L
L
L
1
1
1
C
B
C
7
5
7
A
A
E
32.768
32.768
32.768
Call factory for additional options. Use full descriptive part number when ordering. Parts will be marked with series and frequency only.
Monitor Products Company Inc reserves the right to make changes to its products and product specifications without notice. No liability is assumed as a result of their use or application.
02-19-03
502 VIA DEL MONTE, OCEANSIDE, CA 92054
TEL:
760.433.4510
FAX:
760.434.0255
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