74AC574_05 FAIRCHILD [Fairchild Semiconductor], 74AC574_05 Datasheet - Page 2

• Manufacturer Part Number: 74AC574_05
• Description: Octal D-Type Flip-Flop with 3-STATE Outputs
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

www.fairchildsemi.com
Logic Symbols
Connection Diagram
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
IEEE/IEC
2
Pin Descriptions
Function Table
H
L
X

Z
NC
Functional Description
The AC/ACT574 consists of eight edge-triggered flip-flops
with individual D-type inputs and 3-STATE true outputs.
The buffered clock and buffered Output Enable are com-
mon to all flip-flops. The eight flip-flops will store the state
of their individual D-type inputs that meet the setup and
hold time requirements on the LOW-to-HIGH Clock (CP)
transition. With the Output Enable (OE) LOW, the contents
of the eight flip-flops are available at the outputs. When OE
is HIGH, the outputs go to the high impedance state. Oper-
ation of the OE input does not affect the state of the flip-
flops.
D
CP
OE
O
OE
0
0
LOW Voltage Level
High Impedance
H
H
H
H
HIGH Voltage Level
Immaterial
L
L
L
L
Pin Names
–D
–O
LOW-to-HIGH Transition
No Change
Inputs
7
7




CP D
H
H
H
H
H
H
H
H
L
L
L
L
Internal
Data Inputs
Clock Pulse Input
3-STATE Output Enable Input
3-STATE Outputs
NC
NC
NC
NC
Q
H
H
L
L
Outputs
NC
O
NC
H
Z
Z
Z
Z
L
N
Description
Hold
Hold
Load
Load
Data Available
Data Available
No Change in Data
No Change in Data
Function