HC49/4H & HC49/3H CRYSTALS
Outline in mm (inches) - HC49/4H & HC49/4H-3L
ISSUE 9; 18 OCTOBER 1999
Delivery Options
n
4
(
.
0
.
m
5
a
x
4
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.
0
.
m
5
a
x
Common frequencies are available from stock. Please
0
1
7
m
a
0
1
7
m
a
x
)
see p4 for details
1
(
2
.
7
m
i
n
Holder Style
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1
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2
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7
m
i
n
. 4
Æ
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5
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5
m
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n
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Æ
0
.
4
5
0
.
5
m
i
n
)
0
(
Æ
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.
1
2
)
HC49/4H & HC49/3H crystals are resistance welded,
(
Æ
0
.
0
1
2
)
=
=
hermetically sealed in an inert atmosphere with glass
to metal seals securing the lead wires.
4
)
.
8
8
(
0
.
1
9
2
)
4
.
8
8
(
0
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9
2
1
2
3
n
Holders suffixed ‘–3L have a centre third wire which
4
.
6
5
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1
8
4
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6
5
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1
8
3
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grounds the case
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5
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1
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5
General Specifications
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(
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4
)
0
.
4
3
5
)
Load Capacitance (CL): 10pF to 75pF or Series
P
1
2
3
i
.
.
.
n
c
o
n
n
e
c
i
C
C
r
r
y
y
s
s
t
t
a
a
l
l
n
Drive Level: 500mW max.
C
a
s
e
&
g
n
Static Capacitance (C0): 7pF max.
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
n
Ageing: ±3ppm typical per year
Standard Frequency Tolerances and Stabilities
n
±10ppm, ±±0ppm, ±30ppm, ±50ppm, ±100ppm
+
2
5
Operating Temperature Ranges
n
0 to 50°C
–10 to 60°C
–±0 to 70°C
–30 to 80°C
–40 to 90°C
–55 to 105°C
0
Storage Temperature Range
n
–55 to 1±5°C
Environmental Specification
Shock: 981m/s± for 6ms, three shocks in each direc-
n
tion along three mutually perpendicular planes
n
2
5
Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s± acceleration, 30 minutes in each of
three mutually perpendicular planes
+
2
5
5
0
2
0
+
7
0
+
1
0
0
T
e
m
p
e
r
a
t
u
r
e
(
°
C
)
Typical Frequency vs Temperature Curves
for various angles of BT-cut crystals
Marking
n
Frequency only
+
1
0
0
Outline in mm (inches) - HC49/3H & HC49/3H-3L
3
(
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0
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m
a
x
3
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m
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0
1
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1
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3
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2
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1
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Æ
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Æ
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7
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Æ
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5
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=
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1
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1
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m
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m
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x
P
1
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3
i
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.
n
c
o
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e
c
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i
r
o
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s
0
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4
3
m
a
x
)
0
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4
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m
a
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)
C
C
r
r
y
y
s
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a
a
l
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C
a
s
e
&
g
o
u
n
d
2
5
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0
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2
5
+
7
+
0
1
0
0
T
e
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p
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r
a
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(
°
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Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 7±578
±0
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