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National Semiconductor Electronic Components Datasheet

54ACT174 Datasheet

Hex D Flip-Flop

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July 1998
54AC174 54ACT174
Hex D Flip-Flop with Master Reset
General Description
The ’AC/’ACT174 is a high-speed hex D flip-flop. The device
is used primarily as a 6-bit edge-triggered storage register.
The information on the D inputs is transferred to storage dur-
ing the LOW-to-HIGH clock transition. The device has a
Master Reset to simultaneously clear all flip-flops.
n Outputs source/sink 24 mA
n ’ACT174 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’AC174: 5962-87626
— ’ACT174: 5962-87757
Features
n ICC reduced by 50%
Logic Symbols
Pin Names
D0– D5
CP
MR
Q0– Q5
Description
Data Inputs
Clock Pulse Input
Master Reset Input
Outputs
IEEE/IEC
DS100277-1
DS100277-2
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100277
www.national.com


National Semiconductor Electronic Components Datasheet

54ACT174 Datasheet

Hex D Flip-Flop

No Preview Available !

Connection Diagrams
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
DS100277-3
Functional Description
The ’AC/’ACT174 consists of six edge-triggered D flip-flops
with individual D inputs and Q outputs. The Clock (CP) and
Master Reset (MR) are common to all flip-flops. Each D in-
put’s state is transferred to the corresponding flip-flop’s out-
put following the LOW-to-HIGH Clock (CP) transition. A LOW
input to the Master Reset (MR) will force all outputs LOW in-
dependent of Clock or Data inputs. The ’AC/’ACT174 is use-
ful for applications where the true output only is required and
the Clock and Master Reset are common to all storage
elements.
Logic Diagram
Truth Table
Inputs
MR CP
LX
HN
HN
HL
H = HIGH Voltage Level
L = LOW Voltage Level
N = LOW-to-HIGH Transition
X = Immaterial
DS100277-4
Output
DQ
XL
HH
LL
XQ
DS100277-5
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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2


Part Number 54ACT174
Description Hex D Flip-Flop
Maker National Semiconductor
Total Page 8 Pages
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