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HD74LVC244A データシートの表示(PDF) - Hitachi -> Renesas Electronics
部品番号
コンポーネント説明
メーカー
HD74LVC244A
Octal Buffers / Line Drivers with 3-state Outputs
Hitachi -> Renesas Electronics
HD74LVC244A Datasheet PDF : 9 Pages
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HD74LVC244A
Test Circuit
V
CC
V
CC
Input
Pulse generator
Z
out
= 50
Ω
1G, 2G
1Y1 to 2Y4
1A1 to 2A4
Output
C
L
=
50 pF
500
Ω
S1
450
Ω
50
Ω
Scope
OPEN
*1
See under table
GND
Note:
1. C
L
includes probe and jig capacitance.
Symbol
t
PLH
/ t
PHL
t
ZH
/ t
HZ
t
ZL
/ t
LZ
S1
Vcc=2.7V,
3.3
±
0.3V
Vcc=5.0
±
0.5V
OPEN OPEN
GND
GND
6V
2
×
Vcc
Waveforms – 1
Input A
Output Y
10 %
t
r
90 %
V
ref
t
PLH
V
ref
t
f
90 %
V
ref
10 %
t
PHL
V
ref
Notes:
1. t
r
= 2.5 ns, t
f
= 2.5 ns
2. Input waveform : PRR = 10 MHz, duty cycle 50%
V
IH
GND
V
OH
V
OL
6
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