Datasheet

SN54ABT543A, SN74ABT543A
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS157F – JANUARY 1991 – REVISED MAY 1997
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
†
INPUTS
OUTPUT
CEAB LEAB OEAB A
B
H X X X Z
X XHX Z
L HLXB
0
‡
L LLL L
L L L H 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
§
4
2C6
14
3
A1
4
A2
B1
22
5D
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
B2
21
B3
20
B5
18
B4
19
B6
17
B8
15
B7
16
LEAB
3
G2
11
CEAB
2EN4
13
OEAB
1C5
1
LEBA
G1
23
CEBA
1EN3
2
OEBA
6D
§
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.
1
1