參數(shù)資料
型號(hào)： 935197080112
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 計(jì)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(yè)數(shù)： 10/14頁(yè)
文件大?。?/td> 121K
代理商： 935197080112
Philips Semiconductors
Product specification
74F161A, 74F163A
4-bit binary counters
2000 Jun 30
5
74F163A MODE SELECT – FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
SR
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
(2)
Parallel load
h
↑
h
X
count
(2)
Count
h
X
l
X
h
X
qn
(2)
Hold (do nothing)
h
X
l
h
X
qn
L
Hold (do nothing)
H
=
High voltage level
h
=
High voltage level one setup prior to the Low-to-High clock transition
L
=
Low voltage level
l
=
Low voltage level one setup prior to the Low-to-High clock transition
qn
=
Lower case letters indicate the state of the referenced output prior to the Low-to-High clock transition
X
=
Don’t care
↑
=
Low-to-High clock transition
(1)
=
The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F161A)
(2)
=
The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F163A)
74F161A LOGIC DIAGRAM
R
D
CP
Q
R
D
CP
Q
R
D
CP
Q
R
D
CP
Q
14
Q0
13
Q1
12
Q2
11
Q3
15
TC
6
D3
5
D2
4
D1
3
D0
7
CEP
10
CET
9
PE
1
MR
2
CP
SF00662
VCC = Pin 16
GND = Pin 8
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