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SN54HCT646 Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN54HCT646
Description  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54HCT646 Datasheet(HTML) 2 Page - Texas Instruments

   
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SN54HCT646, SN74HCT646
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCLS178B – MARCH 1984 – REVISED MAY 1997
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
21
L
3
DIR
L
1
CLKAB
X
23
CLKBA
X
2
SAB
X
22
SBA
L
REAL-TIME TRANSFER
BUS B TO BUS A
21
L
3
DIR
H
1
CLKAB
X
23
CLKBA
X
2
SAB
L
22
SBA
X
REAL-TIME TRANSFER
BUS A TO BUS B
21
X
3
DIR
X
1
CLKAB
23
CLKBA
X
2
SAB
X
22
SBA
X
STORAGE FROM
A, B, OR A AND B
21
L
3
DIR
L
1
CLKAB
X
23
CLKBA
H or L
2
SAB
X
22
SBA
H
TRANSFER STORED DATA
TO A AND/OR B
X
H
X
X
XX
X
X
X
L
H
H or L
X
H
X
OE
OE
OE
OE
Pin numbers shown are for the DW, JT, NT, and W packages.
Figure 1. Bus-Management Functions


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