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74ABT657

Octal transceiver with parity generator/checker; 3-state

NXP Semiconductors. 

NXP Semiconductors

74ABT657

Octal transceiver with parity generator/checker; 3-state

6. Functional description

6.1 Function selection

Table 3. Function selection[1]

Number of

Inputs

inputs HIGH OE

T/R

0, 2, 4, 6 and 8 L

H

(even)

L

H

L

L

L

L

L

L

L

L

1, 3, 5 and 7 L

H

(odd)

L

H

L

L

L

L

L

L

L

L

Don’t care

H

X

ODD/EVEN

H

L

H

H

L

L

H

L

H

H

L

L

X

[1] H = HIGH voltage level;

L = LOW voltage level;

X = don’t care;

Z = high-impedance OFF-state.

Data I/O

PARITY

H

L

H

L

H

L

L

H

H

L

H

L

Z

Output

ERROR

Z

Z

H

L

L

H

Z

Z

L

H

H

L

Z

Mode

transmit

transmit

receive

receive

receive

receive

transmit

transmit

receive

receive

receive

receive

3-state

74ABT657_3

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 03 — 15 March 2010

© NXP B.V. 2010. All rights reserved.

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