74ABT574CMTCX Datasheet, PDF (2/10 Pages) Fairchild Semiconductor – Octal D-Type Flip-Flop with 3-STATE Outputs

Functional Description
The ABT574 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 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) transition.
Function Table
With the Output Enable (OE) LOW, the contents of the
eight flip-flops are available at the outputs. When OE is
HIGH, the outputs are in a high impedance state. Opera-
tion of the OE input does not affect the state of the flip-
flops.
OE
H
H
H
H
L
L
L
L
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial
Z High Impedance
LOW-to-HIGH Transition
NC No Change
Logic Diagram
Inputs
CP
H or L
H or L




H or L
H or L
Internal Outputs
Function
D
Q
O
L
NC
Z
Hold
H
NC
Z
Hold
L
L
Z
Load
H
H
Z
Load
L
L
L
Data Available
H
H
H
Data Available
L
NC
NC No Change in Data
H
NC
NC No Change in Data
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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