74ACT11657

OCTAL TRANSCEIVER WITH PARITY GENERATOR/CHECKER

AND 3STATE OUTPUTS

SCAS232 − AUGUST 1992 − REVISED APRIL 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

2−2

FUNCTION TABLE

NUMBER OF A OR B

INPUTS THAT ARE HIGH

INPUTS

INPUT/OUTPUT

PARITY

OUTPUTS

NUMBER OF A OR B

INPUTS THAT ARE HIGH

OE

T/R

ODD/EVEN

INPUT/OUTPUT

PARITY

ERR

OUTPUT MODE

L

H

H

H

Z

Transmit

L

HL

L

Z

Transmit

0, 2, 4, 6, 8

L

LH

H

H

Receive

0, 2, 4, 6, 8

L

LH

L

L

Receive

L

LL

H

L

Receive

L

LL

L

H

Receive

L

H

H

L

Z

Transmit

L

HL

H

Z

Transmit

1, 3, 5, 7

L

LH

H

L

Receive

1, 3, 5, 7

L

LH

L

H

Receive

L

LL

H

H

Receive

L

LL

L

L

Receive

Don’t care

H

X

X

Z

Z

Z

OE

A1

2

A2

3

A3

4

A4

5

A5

10

A6

11

A7

12

A8

13

G3

28

3 EN1/3G5 [REC]

15

3 EN2 [XMIT]

N4

55

B1

27

B2

26

B3

25

B4

24

B5

20

B6

19

B7

18

B8

17

PARITY

1

5

14

T/R

ODD/EVEN

ERR

1

2

2k

4, 2

4, 1

1

1

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.