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零件编号
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HD74HC688FP 查看數據表(PDF) - Renesas Electronics
零件编号
产品描述 (功能)
生产厂家
HD74HC688FP
Octal Bus Transceivers(with inverted 3-state outputs)
Renesas Electronics
HD74HC688FP Datasheet PDF : 8 Pages
1
2
3
4
5
6
7
8
HD74HC688
Test Circuit
V
CC
Input
Pulse Generator
Z
out
= 50
Ω
V
CC
G
P
1
Output
P
7
P=Q
Q
0
Q
7
C
L
=
50 pF
Note : 1. C
L
includes probe and jig capacitance.
Waveforms
•
Waveform – 1
P or Q
P=Q
•
Waveform – 2
G
P=Q
t
r
90%
50%
10%
t
w
t
PLH
90%
50%
t
TLH
t
f
90%
50%
10%
t
PHL
90%
50%
10%
t
THL
t
f
90%
50%
10%
t
PHL
90%
50%
10%
t
THL
t
r
10%
90%
50%
t
PLH
50%
10%
90%
t
TLH
V
CC
0V
V
OH
V
OL
V
CC
0V
V
OH
V
OL
Note : 1. Input waveform : PRR
≤
1 MHz, duty cycle 50%, t
r
≤
6 ns, t
f
≤
6 ns
Rev.2.00, Mar 30, 2006 page 5 of 7
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