Functional Description

The

’ABT373

contains

eight

D-type

latches

with

TRI-STATE output buffers When the Latch Enable (LE) in-

condition the latches are transparent ie 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 tran-

sition of LE The TRI-STATE buffers are controlled by the

Output Enable (OE) input When OE is LOW the buffers are

in the bi-state mode When OE is HIGH the buffers are in

the high impedance mode but this does not interfere with

entering new data into the latches

Truth Table

Inputs

Output

LE

OE

HL

H

H

HL

L

L

LL

X

XH

X

Z

Logic Diagram

TLF11547 – 3

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

2