參數(shù)資料
型號(hào): M74HC182
廠商: 意法半導(dǎo)體
英文描述: Function Look Ahead Carry Generator(超前進(jìn)位發(fā)生器)
中文描述: 功能向前看卡里發(fā)生器(超前進(jìn)位發(fā)生器)
文件頁(yè)數(shù): 2/12頁(yè)
文件大?。?/td> 260K
代理商: M74HC182
FUNCTION TABLES
FOR G OUTPUT
INPUTS
G0
X
X
X
L
OUTPUT
G
L
L
L
L
H
G3
L
X
X
X
G2
X
L
X
X
G1
X
X
L
X
ALL OTHER COMBINATIONS
P3
X
L
L
L
P2
X
X
L
L
P1
X
X
X
L
FOR P OUTPUT
INPUTS
OUTPUT
P
L
H
P3
L
P2
L
P1
L
P0
L
ALL OTHER COMBINATIONS
FOR Cn+x OUTPUT
INPUTS
P0
X
L
OUTPUT
Cn+x
H
H
L
G0
L
X
Cn
X
H
ALL OTHER COMBINATIONS
FOR Cn+y OUTPUT
INPUTS
P1
X
L
L
OUTPUT
Cn+y
H
H
H
L
G1
L
X
X
G0
X
L
X
P0
X
X
L
Cn
X
X
H
ALL OTHER COMBINATIONS
FOR Cn+z OUTPUT
INPUTS
P2
X
L
L
L
OUTPUT
Cn+z
H
H
H
H
L
G2
L
X
X
X
G1
X
L
X
X
G0
X
X
L
X
ALL OTHER COMBINATIONS
P1
X
X
L
L
P0
X
X
X
L
Cn
X
X
X
H
Cn+x = G0 + P0Cn
Cn+y = G1 + P1G0 + P1P0Cn
Cn+z = G2 + P2G1 + P2P1G0 + P2P1P0Cn
G
= G3+ G3 + P3G2 + P3P2G1 + P3P2P1G0
P
= P3P2P1P0
or
Cn+x = Y0 +(X0 +Cn)
Cn+y = Y1 +[X1+ Y0(X0 + Cn)]
Cn+z = Y2 +{X2 +Y1[X1+ Y0(X0 +Cn)]}
G
= Y3 +(X3 + Y2)(X3+ X2 + Y1)(X3 + X2 + X1 + Y0)
P
= X3 +X2 + X1+ X0
M54/M74HC182
2/12
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