74AC11646_09 Datasheet, PDF (3/9 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

74AC11646
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3ĆSTATE OUTPUTS
SCAS079A − JULY 1987 − REVISED APRIL 1993
FUNCTION TABLE
INPUTS
DATA I/O
OE
DIR CLKAB CLKBA SAB SBA A1 THRU A8 B1 THRU B8
OPERATION OR FUNCTION
X
X
↑
X
X
X
X
X
X
Input
Unspecified†
↑
X
X
Unspecified†
Input
Store A, B unspecified†
Store B, A unspecified†
H
X
↑
H
X
L
↑
X
X
Input
Input
L
X
X
Input disabled Input disabled
Store A and B data
Isolation, hold storage
L
L
X
L
L
X
X
X
L
L
X
H
Output
Output
Input
Input
Real-time B data to A bus
Stored B data to A bus
L
H
X
X
L
X
Input
Output
Real-time A data to B bus
L
H
L
X
H
X
Input
Output
Stored A data to B bus
† _{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 will be stored on every low-to-high transition of the clock inputs.
logic symbol^‡
1
OE
14
DIR
16
CLKBA
15
SBA
28
CLKAB
27
SAB
2
A1
3
A2
4
A3
5
A4
10
A5
11
A6
12
A7
13
A8
G3
3 EN1 [BA]
3 EN2 [AB]
C4
G5
C6
G7
≥1 5 ^4D
1
51
6D 7 ≥1
2
17
20
B1
25
B2
24
B3
23
B4
20
B5
19
B6
18
B7
17
B8
‡ _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.}
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