參數(shù)資料
型號： 935197080112
廠商： NXP SEMICONDUCTORS
元件分類： 計數(shù)器
英文描述： F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDIP16
封裝： 0.300 INCH, PLASTIC, SOT-38-4, DIP-16
文件頁數(shù)： 9/14頁
文件大小： 121K
代理商： 935197080112
Philips Semiconductors
Product specification
74F161A, 74F163A
4-bit binary counters
2000 Jun 30
4
STATE DIAGRAM
8
7
6
5
4
12
11
10
9
13
14
15
0
1
2
3
SF00664
APPLICATIONS
Q0 Q1 Q2 Q3
CLOCK
PE
CEP
CET
CP
D1
D2
SF00665
D3
D0
SR
TC
74F163A
+VCC
Figure 1. Maximum count modifying scheme
Terminal count = 6
Q0 Q1 Q2 Q3
PE
CEP
CET
CP
D1
D2
SF00666
D3
D0
SR
TC
74F163A
Q0 Q1 Q2 Q3
PE
CEP
CET
CP
D1
D2 D3
D0
SR
TC
74F163A
Q0 Q1 Q2 Q3
PE
CEP
CET
CP
D1
D2 D3
D0
SR
TC
74F163A
Q0 Q1 Q2 Q3
PE
CEP
CET
CP
D1
D2 D3
D0
SR
TC
74F163A
Q0 Q1 Q2 Q3
PE
CEP
CET
CP
D1
D2 D3
D0
SR
TC
74F163A
CP
H H = Enable count
or
L L = Disable count
Figure 2. Synchronous multistage counting scheme
74F161A MODE SELECT – FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
MR
CP
CEP
CET
PE
Dn
Qn
TC
OPERATING MODE
L
X
L
Reset (clear)
H
↑
X
l
L
Parallel load
H
↑
X
l
h
H
(1)
Parallel load
H
↑
h
X
count
(1)
Count
H
X
l
X
h
X
qn
(1)
Hold (do nothing)
H
X
l
h
X
qn
L
Hold (do nothing)
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