NE556_98 查看數據表（PDF） - STMicroelectronics
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NE556_98 Datasheet PDF : 9 Pages
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NE556/SA556/SE556
TYPICAL APPLICATION
50% DUTY CYCLE OSCILLATOR
VC C
PULSE WIDTH MODULATOR
VCC
RA
RA
4
14
51kΩ
4
14
(10)
6 (8)
Rs
(13) 1
Trigg e r
(1 0 )
6 (8)
(13) 1
1/2
NE556
S E556
(12) 2
2 2kΩ
1/2
NE5 5 6
S E556
(12) 2
Output
5 (9)
(11) 3
0 .0 1 n F
Ou tp u t
5 (9)
(11) 3
7
C
7
C
MODULATION
INPUT
t1= 0.693 RA.C
t2 = [(RARB) ⁄
f
=
1
t1+ t2
RB
(RA +
<
1
2
RB)]
RA ti
CLn
RB − 2RA
2RB − RA
t2
t1
6/9
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