參數(shù)資料
型號(hào): TC74VHC163FK
廠商: Toshiba Corporation
元件分類(lèi): 通用總線功能
英文描述: Synchronous Presettable 4-Bit Counter
中文描述: 同步可預(yù)置4位計(jì)數(shù)器
文件頁(yè)數(shù): 2/15頁(yè)
文件大?。?/td> 334K
代理商: TC74VHC163FK
TC74VHC161,163F/FN/FT/FK
2007-10-01
2
Pin Assignment
IEC Logic Symbol
Truth Table (Note)
TC74VHC161
TC74VHC163
Inputs
Inputs
Outputs
CLR
LD
ENP
ENT
CK
CLR
LD
ENP
ENT
CK
QA
QB
QC
QD
Function
L
X
X
X
X
L
X
X
X
L
L
L
L
Reset to “0”
H
L
X
X
H
L
X
X
A
B
C
D
Preset Data
H
H
X
L
H
H
X
L
No Change
No Count
H
H
L
X
H
H
L
X
No Change
No Count
H
H
H
H
H
H
H
H
Count Up
Count
H
X
X
X
X
X
X
X
No Change
No Count
Note:
X: Don’t care
A, B, C, D: Logic level of data inputs
Carry: CARRY
=
ENT
QA
QB
QC
QD
V
CC
16
CARRY OUTPUT
QA
QB
15
14
13
12
11
10
CLR
1
2
3
4
5
6
7
B
C
D
ENP
GND
QC
8
LOAD
9
QD
ENT
(top view)
CK
A
(9)
(1)
(10)
(7)
(2)
ENP
CK
1, 5D
[1]
[2]
[4]
[8]
(3)
(4)
(5)
(6)
B
C
D
A
(15)
(14)
(13)
(12)
(11)
QB
QC
QD
QA
CT = 0
M1
M2
G3
G4
LOAD
CLR
CARRY OUTPUT
ENT
TC74VHC161
CTRDIV 16
C5/2, 3, 4+
3CT = 15
(9)
(1)
(10)
(7)
(2)
ENP
CK
1, 5D
[1]
[2]
[4]
[8]
(3)
(4)
(5)
(6)
B
C
D
A
(15)
(14)
(13)
(12)
(11)
QB
QC
QD
QA
5CT = 0
M1
M2
G3
G4
LOAD
CLR
CARRY OUTPUT
ENT
TC74VHC163
CTRDIV 16
C5/2, 3, 4+
3CT = 15
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參數(shù)描述
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