Datasheet

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21
L
3
DIR
L
1
CLKAB
X
23
CLKBA
X
2
SAB
X
22
SBA
L
21
L
3
DIR
H
1
CLKAB
X
23
CLKBA
X
2
SAB
L
22
SBA
X
21
X
3
DIR
X
1
CLKAB
23
CLKBA
X
2
SAB
X
22
SBA
X
21
L
3
DIR
L
1
CLKAB
X
23
CLKBA
H or L
2
SAB
X
22
SBA
H
X
H
X
X
X X
X
X
X
L H H or L X H X
BUS B
BUS A
BUS B
BUS A
BUS B
BUS A
BUS B
BUS A
OE OE
OEOE
REAL-TIME TRANSFER
BUS B TO BUS A
REAL-TIME TRANSFER
BUS A TO BUS B
STORAGE FROM
A, B, OR A AND B
TRANSFER STORED DATA
TO A AND/OR B
SN54LVC646A, SN74LVC646A
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS302J JANUARY 1993 REVISED AUGUST 2005
Figure 1. Bus-Management Functions
3