Datasheet

SN54ABT657A, SN74ABT657A
OCTAL TRANSCEIVERS WITH PARITY GENERATORS/CHECKERS
AND 3-STATE OUTPUTS
SCBS192E – JANUARY 1991 – REVISED JUNE 1997
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
B2
22
B3
21
B4
20
B5
17
B6
16
B1
23
OE
T/R
3 EN1/3G5 [REC]
1
A2
3
A3
4
A4
5
A5
6
A6
8
A7
9
A8
10
B7
15
B8
14
ODD/EVEN
3 EN2 [XMIT]
2 k
5
4, 2
4, 1
ERR
G3
24
N4
11
11
A1
2
12
13
14
15
16
17
18
PARITY
13
12
11
Z11 2
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, and NT packages.