Resistance Weld SMD Crystal
RoHS Compliant / Pb Free
Model: HC49SDLF
Rev. 5/2/2013
Page 1 of 2
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FEATURES
• Stock Standard (see page 2)
• Fundamental to 40 MHz
OPTIONS
• Tolerances to 10 PPM
• Stabilities to 5 PPM
• Tape and Reel (1,000 pcs. STD) • Temperatures to -55ºC ~ +125ºC
• 3.2mm Height Max (HC49SSDLF)
10.3 Max
4.5 Max
• PART NUMBERLearn More - Internet Required
3.8 Max
Frequency Range (MHz)
Part Number
Model Number
HC49SDLF
278LF-Frequency-xxxxx
3.200 ~ 80.000
• STANDARD SPECIFICATIONS1
PARAMETERS
Frequency Range
Frequency Tolerance @ 25ºC
Frequency Stability, ref @ 25ºC
Temperature Range
MAX (unless otherwise noted)
3.200 ~ 80.000 MHz
±50 PPM 1,3
13.9 Max
11.7 Max
±50 PPM 1
5.0 Max
-20ºC ~ +70ºC 2
-40ºC ~ +125ºC
7pF
Operating
Storage
Shunt Capacitance (Co)
(TOPR)
(TSTG)
0.75±0.35
Load Capacitance
(CL)
10 pF ~ Series
(Customer Specified)
100uW
Recommended
HC49SD Solder Pad Layout
Drive Level
15.0±0.1
Aging per year
±3 PPM
2.0±0.1
Maximum Soldering Temp / Time
Moisture Sensitivity Level (MSL)
Termination Finish:
260ºC / 10 Seconds
1
Sn/Ag/Cu
4.0±0.1
1
2
Other tolerances, stabilities available. Consult Fox Customer Service for specific requirements.
Operating temperature ranges to -55ºC ~+125ºC available.
3 Crystal has a±30ppm tolerance specification for all standard part numbers. These part numbers
are listed on page 2 of this datasheet.
All dimensions are in millimeters.
TERMINATION FINISH: Sn/3.0Ag/0.5Cu
Note: Dimensional drawing is for reference to critical specifications defined by size measure¬ments.
Certain non-critical visual attributes, such as side castellations, etc. may vary.
All specifications subject to change without notice.
Frequency Range
Operating Mode
Max ESR Ω
(MHz)
3.200 ~ 3.500
300
200
150
120
100
80
60
40
30
100
80
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
3rd OT
3.500+ ~ 4.000
4.000+ ~ 5.000
5.000+ ~ 6.000
6.000+ ~ 7.000
7.000+ ~ 9.000
9.000+ ~ 13.000
13.000+ ~ 20.000
20.000+ ~ 40.000
27.000 ~ 70.000
70.000+ ~ 80.000
3rd OT
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