SN54ABT543A, SN74ABT543A
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS157F – JANUARY 1991 – REVISED MAY 1997
FUNCTION TABLE†
INPUTS
CEAB
H
X
L
L
L
LEAB
X
X
H
L
L
OEAB
X
H
L
L
L
A
X
X
X
L
H
OUTPUT
B
Z
Z
B0‡
L
H
† A-to-B data flow is shown; B-to-A flow control is the
same except that it uses CEBA, LEBA, and OEBA.
‡ Output level before the indicated steady-state
input conditions were established
logic symbol
§
OEBA
CEBA
LEBA
OEAB
11
CEAB
14
LEAB
A1
3
3
4
5
6
7
8
9
10
6D
2
23
1
13
1EN3
G1
1C5
2EN4
G2
2C6
1
1
5D
4
22
B1
A2
A3
A4
A5
A6
A7
A8
21
20
19
18
17
16
15
B2
B3
B4
B5
B6
B7
B8
§ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DB, DW, JT, NT, PW, and W packages.
2
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