74ACTQ18825CW Ver la hoja de datos (PDF) - Fairchild Semiconductor

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74ACTQ18825CW

18-Bit Buffer/Line Driver with 3-STATE Outputs

Fairchild Semiconductor 

Connection Diagram

Logic Diagram

Functional Description

The ACTQ18825 contains eighteen non-inverting buffers

with 3-STATE standard outputs. The device is byte con-

trolled with each byte functioning identically, but indepen-

dently of the other. The control pins may be shorted

together to obtain full 18-bit operation. The 3-STATE out-

puts are controlled by an Output Enable (OEn) input for

each byte. When OEn is LOW, the outputs are in 2-state

mode. When OEn is HIGH, the outputs are in the high

impedance mode, but this does not interfere with entering

new data into the inputs.

Truth Table

Inputs

Outputs

Byte 1 (0:8) Byte 2 (8:17) I0–I8 I9–I17 O0–O8 O9–O17

OE1 OE2 OE3 OE4

L

L

L

L

H

H

H

H

HX L

L

XL

Z

L

XH L

L

XH

Z

H

L

L

H

X

L

X

L

Z

L

L

X

H

H

X

H

Z

HH

H

H

X

X

Z

Z

LL

L

L

L

L

L

L

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = HIGH Impedance

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