Datasheet

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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 V
CC
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 I
off
. The I
off
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