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LM339 Datasheet(PDF) 5 Page - Estek Electronics Co. Ltd

Part # LM339
Description  consists of four independent voltage comparators
PDF  6 Pages
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Manufacturer  ESTEK [Estek Electronics Co. Ltd]
Direct Link  http://www.estek.com.cn/en/index.asp
Logo ESTEK - Estek Electronics Co. Ltd

LM339 Datasheet(HTML) 5 Page - Estek Electronics Co. Ltd

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5
BEIJING ESTEK ELECTRONICS CO.,LTD
Typical Applications Circuit
with Hystersis
with Hysteresis
Vref=
VCCR1
Rref+R1
R2
≈ R1/ / Rref
Amount of Hysteresis VH
VH=
R2
R2+R3
[(VO(max) - VO(min)]
Vref
VCCR1
Rref+R1
R1/ / Rref// R2
VH=
R1/ / Rref
R1// Rref+R2
[VO(max)-VO(min)]
Rref/ / /R1
+ VCC
Vin
Vref
+ VCC
+ VCC
Vin
Vref
Rref
Rref
±
+
±
+
VO
VO
10k R1
R2
R3
10k
1.0M
R3
R2
1.0M
10k
R1
10k
10k
≈
≈
Figure
Driving Logic
Logic
Device
VCC
(V)
RL
k
Ω
CMOS
TTL
1/4 MC14001
1/4 MC7400
+15
+5.0
100
10
RS=Source Resistance
R1
≈ RS
T1=T2= 0.69RC
f
=
7.2
C(
µF)
R2=R3= R4
R2//R3//R4
±
+
+
±
VCC
Vin
V ref
VCC. 4.0V
VCC
+
C
330k
R4
330k
R3
R1
100k
10k
R1
T1
T2
VCC
VO
RS
RL
R2
330k
Figure 1. Inverting Comparator
1
Figure . Noninverting Comparator
2
3.
Figure . Squarewave Oscillator
4
LM339



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