74HC573 is a transparent latch with eight outputs and a three-state output gate, which is a high performance silicon gate CMOS device.
The 74HC573 contains eight D-type transparent latches, each with an independent D-type input, and three state outputs for bus-oriented applications. All latches share a latch enable (LE) terminal and an output enable (OE) terminal. It is concluded that 74hc573 chip belongs to 8-bit digital tube driver chip.