HD74HC564/HD74HC574 Octal D-type Flip-Flops (with 3-state outputs) Description 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.
Data at the D inputs, meeting the set-up and hold time requirements, are transferred to the Q or Q outputs on positive going transitions of the clock (CK) input.
when a high logic level is applied to the output cotrol (OC) input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.
Features • • • • • High Speed Operation: tpd (Clock to Outp...

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