Part Number : HD74HC564P
Function : Octal D-type Flip-Flops (with 3-state outputs)
Manufacturers : Hitachi -> Renesas Electronics
These devices are positive edge triggered flip-flops.
The difference between HD74HC564 and HD74HC574 is only that the former has inverting outputs and the latter has noninvertering outputs.
Datasheet PDF Download
Other data sheets within the file : HD74HC564,HD74HC564P,HD74HC574,HD74HC574P