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The ’LV573A devices are octal transparent D-type latches designed for 2-V to 5.5-V VCC operaTIon.
These devices feature 3-state outputs designed specifically for driving highly capaciTIve or relaTIvely low-impedance loads. They are parTIcularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at the D inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly.