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SN74BCT956DW Scheda tecnica(PDF) 3 Page - Texas Instruments

Il numero della parte SN74BCT956DW
Spiegazioni elettronici  OCTAL BUS TRANSCEIVER AND LATCH WITH 3-STATE OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SN74BCT956DW Scheda tecnica(HTML) 3 Page - Texas Instruments

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SN74BCT956
OCTAL BUS TRANSCEIVER AND LATCH
WITH 3STATE OUTPUTS
SCBS088A − NOVEMBER 1991 − REVISED NOVEMBER 1993
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
FUNCTION TABLE
INPUTS
DATA I/O
OPERATION OR FUNCTION
OE
DIR
LEAB
LEBA
SAB
SBA
A1 THRU A8
B1 THRU B8
OPERATION OR FUNCTION
X
X
L
X
X
X
Input
Unspecified†
Store A, B unspecified†
X
X
X
L
X
X
Unspecified†
Input
Store B, A unspecified†
L
H
X
X
L
X
Input
Output
A transparent, real-time A data to B bus (thru)
L
H
H
X
H
X
Input
Output
A transparent, real-time A data to B bus (latch)
L
H
L
X
L
X
Input
Output
A data latched, real-time A data to B bus (thru)
L
H
L
X
H
X
Input
Output
A data latched, latched A data to B bus (latch)
L
L
X
X
X
L
Output
Input
B transparent, real-time B data to A bus (thru)
L
L
X
H
X
H
Output
Input
B transparent, real-time B data to A bus (latch)
L
L
X
L
X
L
Output
Input
B data latched, real-time B data to A bus (thru)
L
L
X
L
X
H
Output
Input
B data latched, latched B data to A bus (latch)
H
X
L
L
X
X
Input
Input
Isolation, A and B data latched
H
X
H
H
X
X
Input
Input
Isolation, no storage
† The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled;
i.e., data at the bus pins is latched whenever the appropriate latch-enable input is low.
logic symbol
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
11
B2
19
B3
18
B4
17
B5
16
B6
15
B7
14
B8
13
OE
G3
21
3 EN2 [AB]
G5
22
SBA
A1
4
B1
20
4D
3 EN1 [BA]
3
DIR
C4
23
LEBA
C6
1
LEAB
G7
2
SAB
5
7
7
5
1
1
6D
≥1
≥1
1
2
‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.


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