HC49/4H & HC49/3H CRYSTALS
ISSUE 9; 18 OCTOBER 1999
Delivery Options
n
Outline in mm (inches) - HC49/4H & HC49/4H-3L
4 .0 m a x
(0 .1 5 7 m a x )
脝
0 .4 5
(
脝
0 .0 1 2 )
= =
4 .8 8 (0 .1 9 2 )
1
4 .6 5 (0 .1 8 3 )
1 1 .0 5
(0 .4 3 5 )
1 1 .0 5
(0 .4 3 5 )
P in
1 . C
2 . C
3 . C
c o n n e c ito n s
ry s ta l
a s e & g ro u n d
ry s ta l
2
3
4 .6 5 (0 .1 8 3 )
1 2 .7 m in
(0 .5 m in )
Common frequencies are available from stock. Please
see p4 for details
脝
0 .4 5
(
脝
0 .0 1 2 )
4 .8 8 (0 .1 9 2 )
4 .0 m a x
(0 .1 5 7 m a x )
1 2 .7 m in
(0 .5 m in )
Holder Style
n
HC49/4H & HC49/3H crystals are resistance welded,
hermetically sealed in an inert atmosphere with glass
to metal seals securing the lead wires.
Holders suffixed 鈥樷€?L have a centre third wire which
grounds the case
n
QUARTZ
CRYSTALS
General Specifications
n
n
n
n
Load Capacitance (C
L
): 10pF to 75pF or Series
Drive Level: 500mW max.
Static Capacitance (C
0
): 7pF max.
Ageing: 鹵3ppm typical per year
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
+ 2 5
Standard Frequency Tolerances and Stabilities
n
鹵10ppm, 鹵20ppm, 鹵30ppm, 鹵50ppm, 鹵100ppm
Operating Temperature Ranges
n
D
f/f
0
(p p m )
0 to 50擄C
鈥?0 to 60擄C
鈥?0 to 70擄C
鈥?0 to 80擄C
鈥?0 to 90擄C
鈥?5 to 105擄C
Storage Temperature Range
n
0
鈥?5 to 125擄C
Shock: 981m/s
2
for 6ms, three shocks in each direc-
tion along three mutually perpendicular planes
Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s
2
acceleration, 30 minutes in each of
three mutually perpendicular planes
Environmental Specification
n
n
聳 2 5
聳 5 0
聳 2 0
+ 2 5
T e m p e ra tu re (擄 C )
+ 7 0
+ 1 0 0
Marking
n
Frequency only
Typical Frequency vs Temperature Curves
for various angles of BT-cut crystals
+ 1 0
0
Outline in mm (inches) - HC49/3H & HC49/3H-3L
3 .0 m a x
(0 .1 1 8 m a x )
脝
0 .4 3
(
脝
0 .0 1 7 )
4 .8 8 (0 .1 9 2 )
4 .6 5 (0 .1 8 3 )
1 1 .0 m a x
(0 .4 3 5 m a x )
1 1 .0 m a x
(0 .4 3 5 m a x )
1 3 .2 m in
(0 .5 2 m in )
脝
0 .4 3
(
脝
0 .0 1 7 )
= =
4 .8 8 (0 .1 9 2 )
1 2 3
1 3 .2 m in
(0 .5 2 m in )
聳 5 0
4 .6 5 (0 .1 8 3 )
P in
1 . C
2 . C
3 . C
c o n n e c tio n s
ry s ta l
a s e & g ro u n d
ry s ta l
20
D
f/f
0
(p p m )
3 .0 m a x
(0 .1 1 8 m a x )
聳 5 0
聳 2 0
+ 2 5
T e m p e ra tu re (擄 C )
+ 7 0
+ 1 0 0
Europe Tel: +44 (0)1460 74433
Fax: +44 (0)1460 72578
Americas Tel: +1 919 941 0430
Fax: +1 919 941 0530
1
2
