HD74HCT564 Datasheet, PDF (1/11 Pages) Hitachi Semiconductor – Octal D-type Flip-Flops (with 3-state outputs)

HD74HCT564/HD74HCT574
Octal D-type Flip-Flops (with 3-state outputs)
Description
These devices are positive edge triggered flip-flops. The difference between HD74HCT564 and
HD74HCT574 is only that the former has inverting outputs and the latter has non-inverting 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
control (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
• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
• High Speed Operation: t_pd (D to Q, Q) = 15 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: V_CC = 4.5 to 5.5 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
Function Table
Output Control
L
L
L
H
Clock
L
X
Data
H
L
X
X
Outputs
HD74HCT564
L
H
Q₀
Z
HD74HCT574
H
L
Q₀
Z