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Functional Description

The LVQ573 contains eight D-type latches with 3-STATE

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

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

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

the latches store the information that was present on the

D-type 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

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