HC49/4H SMX Crystals
ISSUE 13 ; 28 SEPTEMBER 2004
Delivery Options
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Outline in mm
Please contact our sales office for current leadtimes
11.4±0.2
10.3 max
0.7
4.3 max
4.9 max
SURFACE MOUNT
QUARTZ CRYSTALS
Holder Style
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HC49/4H SMX crystals are resistance welded,
hermetically sealed in an inert atmosphere with glass to
metal seals securing the lead wires. The lead wires are
formed into a gull wing and mounted on a plastic
former
Lower profiles available, please contact our sales office
3.8 max
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0.6
13.4 max.
4.4
Solder pad layout
15.0
4.0
2.0
+70
General Specifications
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Load Capacitance (C
L
): 10pF to 75pF or Series
Drive Level: 0.5mW max
Static Capacitance (C
0
): 9pF max
Ageing: ±3ppm typical per year
Typical Frequency Vs Temperature Curves for various
angles of AT-cut crystals
+25
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Standard Frequency Tolerances and Stabilities
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±50ppm, ±100ppm
∆f/f
0
(ppm)
Operating Temperature Ranges
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0 to 50°C
–10 to 60°C
–20 to 70°C
–30 to 80°C
0
Storage Temperature Range
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–55 to 125°C
Environmental Specification
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Shock: 981m/s
2
for 6ms, three shocks in each direction
along three mutually perpendicular planes,
Vibration: 10 to 60Hz 0.75mm displacement, 60 to 500Hz
98.1m/s
2
acceleration, 30 minute in each of three
mutually perpendicular planes
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–25
–50
–20
+25
Temperature (°C)
+100
Solder Condition
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For typical soldering conditions, please see the relevant
page in Application Notes
Marking
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Frequency only
Minimum Order Information Required
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Frequency + Holder + Frequency Tolerance @ 25°C
+ Frequency Stability + Operating Temperature Range +
Circuit Condition + Overtone Order
162
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