參數(shù)資料
型號(hào): I74F161AN
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: HF SMT 50 Relay
中文描述: F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDIP16
封裝: PLASTIC, DIP-16
文件頁(yè)數(shù): 5/14頁(yè)
文件大小: 111K
代理商: I74F161AN
Philips Semiconductors
Product specification
74F161A, 74F163A
4-bit binary counters
1996 Jan 29
5
74F163A MODE SELECT – FUNCTION TABLE
INPUTS
SR
CP
CEP
l
X
h
X
h
X
h
h
h
X
l
h
X
X
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
q
n
=
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)
OUTPUTS
Qn
L
L
H
count
q
n
q
n
OPERATING MODE
CET
X
X
X
h
X
l
PE
X
l
l
h
h
h
Dn
X
l
h
X
X
X
TC
L
L
(2)
(2)
(2)
L
Reset (clear)
Parallel load
Count
Hold (do nothing)
74F161A LOGIC DIAGRAM
R
D
CP
Q
Q
R
D
CP
Q
Q
R
D
CP
Q
Q
R
D
CP
Q
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
V
= Pin 16
GND = Pin 8
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