HD74HC564 Datasheet, PDF (1/11 Pages) Hitachi Semiconductor – Octal D-type Flip-Flops (with 3-state outputs)

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: t_pd (Clock to Output) = 13 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
Function Table
Outputs
Output Control Clock
Data
HD74HC564
HD74HD574
L
H
L
H
L
L
H
L
L
L
H
X
X
Q₀
Q₀
X
Z
Z
Q₀ : level of Q before the indicated Steady-sate input conditions were established.
Q₀ : complement of Q₀ or level of Q before the indicated Steady-state input Conditions were established.