74HC563D,652 [NXP]

The 74HC/HCT563 are octal D-type transparent latches with 3-state inverting outputs. They feature separate D-type inputs for each latch and inverting 3-state outputs for bus-oriented applications. A latch enable (LE) input and an output enable (OE) input are common to all latches. When LE is HIGH, data at the D inputs enter the latches and the latches are transparent. When LE is LOW, the latches store the information that was present at the D-inputs. When OE is LOW, the contents of the 8 latches are available at the outputs. When OE is HIGH, the outputs go to the high impedance OFF-state. The '563' is functionally identical to the '573', but has inverted outputs.