74FCT534 Datasheet, PDF (2/8 Pages) National Semiconductor (TI) – Octal D Flip-Flop with TRI-STATE Outputs

Functional Description
The ’FCT534 consists of eight edge-triggered flip-flops with
individual D-type inputs and TRI-STATE complementary
outputs The buffered clock and buffered Output Enable are
common to all flip-flops The eight flip-flops will store the
state of their individual D inputs that meet the setup and
hold times requirements on the LOW-to-HIGH Clock (CP)
Logic Diagram
transition With the Output Enable (OE) LOW the contents
of the eight flip-flops are available at the outputs When the
OE is HIGH the outputs go to the high impedance state
Operation of the OE input does not affect the state of the
flip-flops
TL F 10665 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
Function Table
Inputs
CP
OE
D
L
L
H
L
L
L
L
L
X
X
H
X
Output
O
L
H
O₀
Z
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
L e LOW-to-HIGH Clock Transition
Z e High Impedance
O₀ e Value stored from previous clock cycle
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