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SN74ABT646ADWRE4 Datasheet(数据表) 3 Page - Texas Instruments

部件型号  SN74ABT646ADWRE4
说明  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
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SN54ABT646A, SN74ABT646A
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3STATE OUTPUTS
SCBS069H − JULY 1991 − REVISED MAY 2004
3
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 DB, DGV, DW, JT, NS, NT, PW, and W packages.
Figure 1. Bus-Management Functions




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