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零件编号
产品描述 (功能)
HD74LVC139 查看數據表(PDF) - Renesas Electronics
零件编号
产品描述 (功能)
生产厂家
HD74LVC139
Dual 2-to-4-line Decoders / Demultiplexers
Renesas Electronics
HD74LVC139 Datasheet PDF : 6 Pages
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3
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5
6
HD74LVC139
Test Circuit
V
CC
Input
Pulse Generator
Z
out
= 50
Ω
V
CC
A
Y
0
to Y
3
Output
C
L
=
450
Ω
50 pF
50
Ω
Scope
B
G
Note: 1. C
L
includes probe and jig capacitance.
Waveforms
Notes:
Input
In phase output
10 %
t
r
90 %
V
ref
t
PLH
V
ref
t
PHL
t
f
90 %
V
ref
10 %
t
PHL
V
ref
t
PLH
V
IH
GND
V
OH
V
OL
Out of
phase output
V
ref
V
ref
V
OH
V
OL
Symbol
V
CC
= 2.7 V,
3.3±0.3 V
V
CC
= 5.0±0.5 V
V
IH
2.7 V
V
CC
V
ref
1.5 V
50%V
CC
1. t
r
= 2.5 ns, t
f
= 2.5 ns
2. Input waveform : PRR = 10 MHz, duty cycle 50%
Rev.3.00 Jul. 23, 2004 page 4 of 5
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