HC51 & HC47 CRYSTALS
Outline in mm (inches) - HC51 & HC51-3L
ISSUE 8; 19 JUNE 1997
Delivery Options
n
Common frequencies are available from stock. Please
see p6 for details
19.43 max
(0.765 max)
n
3 day Express Manufacturing Service, subject to piece
part stock availability
Æ
0.76
Æ
0.76
(
Æ
0.03)
Æ
(
0.03)
Holder Style
n
HC51 crystals are resistance welded, hermetically
12.7 min
(0.5 min)
sealed in an inert atmosphere with glass to metal seals
securing the lead wires; HC48 is plug–in version
12.34 (0.486)
19.05 (0.75)
12.34 (0.486)
Pin connections
1. Crystal
2. Case & ground
3. Crystal
n
HC47 crystals are cold welded; HC36 is plug–in ver-
sion
1
2
3
8.86
(0.349)
8.86
(0.349)
n
Holders suffixed ‘–3L have a centre third wire which
grounds the case; this is not applicable to the HC36
and HC48
19.05 (0.75)
General Specifications
n
Load Capacitance (CL): 10pF to 75pF or Series
Outline in mm (inches) - HC48 & HC36
n
Drive Level: 1mW max.
n
1
(
9
.
4
3
m
a
x
Static Capacitance (C0): 9pF max.
0
.
7
6
5
m
a
x
)
n
Ageing: 3ppm typical per year
Æ
1
.
2
7
Standard Frequency Tolerances and Stabilities
n
(
Æ
0
.
0
5
)
6
(
.
0
.
5
m
8
i
n
0
2
3
m
i
n
)
10ppm, 15ppm, 20ppm, 30ppm, 50ppm,
100ppm
1
2
.
3
4
(
0
.
4
8
6
)
Operating Temperature Ranges
n
0 to 50°C
–10 to 60°C
–20 to 70°C
–30 to 80°C
–40 to 90°C
–55 to 105°C
–55 to 125°C
8
(
.
8
.
6
0
3
4
9
)
1
9
.
0
5
(
0
.
7
5
)
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
Storage Temperature Range
n
–55 to 125°C
+
2
5
Environmental Specification
Shock: 981m/s2 for 6ms, three shocks in each direc-
n
tion along three mutually perpendicular p lanes
n
Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s2 acceleration, 30 minutes in each of
three mutually perpendicular planes
0
Marking
n
Includes Frequency
Minimum Order Information Required
n
Frequency + Holder + Frequency Tolerance @ 25°C
+ Frequency Stability + Operating Temperature
Range + Circuit Condition + Overtone Order
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
)
Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578
26
Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530
ETC [ ETC ]
