Unit Loading/Fan Out
Input IIH/IIL
U.L.
Pin Names
Description
Output IOH/IOL
HIGH/LOW
1.0/2.0
OE
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs or
20 µA/−1.2 mA
20 µA/−1.2 mA
70 µA/−0.65 mA
T/R
1.0/2.0
A0–A7
3.5/1.083
3-STATE Outputs
150/40(38.3) −3 mA/24 mA (20 mA)
3.5/1.083 70 µA/−0.65 mA
B0–B7
Side B Inputs or
3-STATE Outputs
600/106.6(80) −12 mA/64 mA (48 mA)
Truth Table
Inputs
T/R
Output
OE
L
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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