SA556_03 데이터 시트보기 (PDF) - STMicroelectronics
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SA556_03 Datasheet PDF : 8 Pages
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Figure 7 : High Output Voltage Drop versus
Output
Figure 8 : Delay Time versus Supply Voltage
NE556-SA556-SE556
TYPICAL APPLICATION
50% DUTY CYCLE OSCILLATOR
VCC
Output
RA
4
(10)
6 (8)
51kW
14
Rs
(13) 1
1/2
22kW
NE556
SE556
(12) 2
5 (9)
(11) 3
0.01nF
7
C
t1 = 0.693 RA.C
t2 = [(RARB)/(RA+RB)]CLn
f = t---1---t-+-1----t--2-- R B < 12-- RA ti
R2----R-B----B--–----–2----RR-----AA--
t2
Figure 9 : Propagation Delay versus Voltage
Level of Trigger Value
t1
PULSE WIDTH MODULATOR
VCC
Trigger
Output
4
(10)
6 (8)
14
(13) 1
1/2
NE556
SE556
(12) 2
5 (9)
(11) 3
7
MODULATION
INPUT
RA
C
5/8
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