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74F161A データシートの表示(PDF) - Philips Electronics
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コンポーネント説明
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74F161A
4-bit binary counter
Philips Electronics
74F161A Datasheet PDF : 14 Pages
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Philips Semiconductors
4-bit binary counters
Product specification
74F161A, 74F163A
STATE DIAGRAM
0
1
2
3
4
15
5
14
6
13
7
12
11
10
9
8
SF00664
APPLICATIONS
+V
CC
CLOCK
D0 D1 D2 D3
PE
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
SF00665
Figure 1. Maximum count modifying scheme
Terminal count = 6
H H = Enable count
or
L L = Disable count
PE
D0 D1 D2 D3
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
PE
D0 D1 D2 D3
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
PE
D0 D1 D2 D3
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
PE
D0 D1 D2 D3
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
PE
D0 D1 D2 D3
CEP
CET 74F163A TC
CP
SR
Q0 Q1 Q2 Q3
CP
Figure 2. Synchronous multistage counting scheme
SF00666
74F161A MODE SELECT – FUNCTION TABLE
INPUTS
MR
CP
CEP
CET
PE
Dn
L
X
X
X
X
X
H
↑
X
X
l
l
H
↑
X
X
l
h
H
↑
h
h
h
X
H
X
l
X
h
X
H
X
X
l
h
X
OUTPUTS
Qn
TC
L
L
L
L
H
(1)
count
(1)
q
n
(1)
q
n
L
OPERATING MODE
Reset (clear)
Parallel load
Count
Hold (do nothing)
1996 Jan 29
4
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