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參數(shù)資料
| 型號(hào)： | A140K |
| 英文描述： | IC |
| 中文描述： | 集成電路 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大小： | 86K |
| 代理商： | A140K |
HC49/4H & HC49/3H CRYSTALS
ISSUE 9; 18 OCTOBER 1999
Delivery Options
Common frequencies are available from stock. Please
see p4 for details
Holder Style
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 ‘–3L have a centre third wire which
grounds the case
General Specifications
Load Capacitance (C
L
): 10pF to 75pF or Series
Drive Level: 500 W max.
Static Capacitance (C
0
): 7pF max.
Ageing: ±3ppm typical per year
Standard Frequency Tolerances and Stabilities
±10ppm, ±20ppm, ±30ppm, ±50ppm, ±100ppm
Operating Temperature Ranges
0 to 50°C
–10 to 60°C
–20 to 70°C
–30 to 80°C
–40 to 90°C
–55 to 105°C
Storage Temperature Range
–55 to 125°C
Environmental Specification
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
acceleration, 30 minutes in each of
three mutually perpendicular planes
Marking
Frequency only
EuropeTel:+44(0)146074433
Fax:+44(0)146072578
20
Americas Tel:+19199410430
Fax:+19199410530
Q
C
!
"
"
Outline in mm (inches) - HC49/4H & HC49/4H-3L
#
$ %
#
'
'
'
'
#
(
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
#
$ %
#
'
'
'
'
#
(
Typical Frequency vs Temperature Curves
for various angles of BT-cut crystals
"
"
!
Outline in mm (inches) - HC49/3H & HC49/3H-3L
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