HC49/4H SMX CRYSTALS
Outline in mm (inches)
ISSUE 9; 18 OCTOBER 1999
Delivery Options
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Common frequencies are available from stock. Please
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4
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2
3
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4
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0
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see p143 for details
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Holder Style
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HC49/4H SMX crystals are resistance welded, her-
metically 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
4
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.
3
m
6
a
x
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1
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S
o
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a d
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Lower profiles available, please contact our sales office
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General Specifications
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Load Capacitance (CL): 10pF to 75pF or Series
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Drive Level: 0.5mW max
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Static Capacitance (C0): 9pF max
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
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Ageing: 3ppm typical per year
+
2
5
Standard Frequencies
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3.579545MHz, 3.68640MHz, 4.0MHz,
4.91520MHz, 5.0MHz, 6.0MHz, 7.37280MHz,
8.0MHz, 8.1920MHz, 9.83040MHz, 10.0MHz,
11.05920MHz, 12.0MHz, 14.318180MHz,
14.74560MHz, 15.360MHz, 16.0MHz,
18.4320MHz, 19.66080MHz, 20.0MHz
0
Standard Frequency Tolerances and Stabilities
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50ppm, 100ppm
Operating Temperature Ranges
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0 to 50°C
–10 to 60°C
–20 to 70°C
–30 to 80°C
2
5
+
2
5
5
0
2
0
+
7
0
+
1
0
0
T
e
m
p
e
r
a
t
u
r
e
(
°
C
)
Storage Temperature Range
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–40 to 85°C
Typical Solder Condition - Infrared Reflow
°
C
Environmental Specification
1
0
s
e
c
Shock: 981m/s2 for 6ms, three shocks in each direc-
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tion along three mutually perpendicular planes
2
4
5
°
C
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Vibration: 10 to 60Hz 0.75mm displacement, 60 to
2
1
0
0
0
0
1
~
5
°
C
/
s
e
c
500Hz 98.1m/s2 acceleration, 30 minutes in each of
three mutually perpendicular planes
Marking
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1
~
5
°
C
/
s
e
c
Frequency only
1
~
9
°
C
/
s
e
c
Minimum Order Information Required
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Frequency + Holder + Frequency Tolerance @ 25°C
+ Frequency Stability + Operating Temperature
Range + Circuit Condition + Overtone Order
0
6
0
s
e
c
2
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c
T
i
m
e
Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578
162
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