Pl tronics, Inc.
.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
SM55, SM45, SM40 Crystal
HC-49/US Low Profile Crystal Mounted on a Surface Mount Platform
Available in 3 heights, SM55: 5.5mm, SM45: 4.5mm, SM40: 4.0mm
Solder Pad Compatible with our SM39S and SMD Crystals from Epson, Meiden & Citizen
Available in Standard 4 pad or Optional 2 pad Pinout Style
Standard Specifications
± 30 PPM is standard, tighter tolerances available
Calibration Frequency Tolerance at 25
°
C
Operating Temperature Range (OTR)
0 to +70°C is standard, but can be extended to -40 to +85°C
Frequency Stability (FS) over OTR
± 50 PPM is standard, tighter tolerances available
Drive Level
50
μW
is standard, customer may specify
Aging at 25°C
± 5 PPM per year is standard, customer may specify ± 1 PPM
Shunt Capacitance
7 pF maximum
Pullability
May be specified by customer in terms of frequency shift required over a certain range of load capacitance
(e.g. +100 PPM from CL=12 to CL=18 pF) or as motional capacitance ( fF )
Part Numbering Guide
Portions of the part number that appear after the frequency may not
be marked on part (C of C provided)
SM45 B E - xx - 70.0M - XXX
(Internal Code or blank)
Oscillation
Mode
3.200 MHz
–
70.000 MHz
ESR Values
Frequency Range
(MHz)
Maximum
ESR (Ohms)
Model (Height/Pinout)
SM55: 2 pad, SMP55: 4 pad (5.5mm)
SM45: 2 pad, SMP45: 4 pad (4.5mm)
SM40: 2 pad, SMP40: 4 pad (4.0mm)
Cal Tol / Freq Stability
Blank = 30/50
B = 30/30
Frequency in MHz
Load Capacitance
Parallel Resonance in pF (
>
9
pF)
SR = Series Resonance
Fundamental
AT Cut
3.200
5.000
8.000
12.000
–
–
–
–
4.999
7.999
11.999
30.000
300
120
70
50
100
3rd Overtone
AT Cut
25.000 – 70.000
Temperature Range
Consult factory for lower ESR
Blank: 0 to +70
°
C
Consult factory for available frequencies and specs.
E: - 40 to +85
°
C
Not all options available for all frequencies. A special part number may be assigned.
Mechanical: inches (mm)
Packaging
24mm tape
12mm pitch
not to scale
Solder Pads
Standard Pinout (SM)
.094 (2.4)
.063 (1.6)
.197 (5.0)
MAX
Due to part size and factory abilities, part marking may vary from lot to lot and may contain our part number or an internal code.
PART STYLE MAY BE EITHER OF THE FOLLOWING:
.492 (12.5) MAX
4
Marking
1
2
3
.516 (13.1) MAX
.195 (4.95) MAX
.256 (6.5)
.087 (2.2)
.142 (3.6)
SM55: .217 (5.5) MAX
SM45: .177 (4.5) MAX
SM40: .157 (4.0) MAX
.354 (9.0
± 0.1)
4
Optional 2 Pad Pinout (SMP)
.370 (9.4)
.063 (1.6)
CASE GND
.094 (2.4)
.055 (1.4)
.079 (2.0)
.138 (3.5)
1
CASE GND
.256 (6.5)
.087 (2.2)
.142 (3.6)
.079 (2.0)
Aug 2005
Pl tronics, Inc.
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
37
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
