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DESCRIPTION/ORDERING INFORMATION (CONTINUED)

A1

B1

OEBA2

OEAB2

To Eight Other Channels

OEAB1

OEBA1

1

11

13

14

2

23

SN74LVC863A

9-BIT BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS310J – MARCH 1993 – REVISED MARCH 2005

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.

FUNCTION TABLE

INPUTS

OPERATION

OEAB1

OEAB2

OEBA1

OEBA2

L

L

L

L

Latch A and B

L

L

H

X

A to B

L

L

X

H

H

X

L

L

B to A

X

H

L

L

H

X

H

X

H

X

X

H

Isolation

X

H

X

H

X

H

H

X

LOGIC DIAGRAM (POSITIVE LOGIC)

2