74LCX573CW View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

74LCX573CW

Low Voltage Octal Latch with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

Functional Description

The LCX573 contains eight D-type latches with 3-STATE

output buffers. When the Latch Enable (LE) input is HIGH,

data on the Dn inputs enters the latches. In this condition

the latches are transparent, i.e., a latch output will change

state each time its D input changes. When LE is LOW the

latches store the information that was present on the D

inputs a setup time preceding the HIGH-to-LOW transition

of LE. The 3-STATE buffers are controlled by the Output

Enable (OE) input. When OE is LOW, the buffers are

enabled. When OE is HIGH the buffers are in the high

impedance mode but this does not interfere with entering

new data into the latches.

Logic Diagram

Truth Table

Inputs

Outputs

OE

LE

D

On

L

H

H

H

L

H

L

L

L

L

X

O0

H

X

X

Z

H = HIGH Voltage

L = LOW Voltage

Z = High Impedance

X = Immaterial

O0 = Previous O0 before HIGH-to-LOW transition of Latch Enable

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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