54AC174 Datasheet PDF - National Semiconductor
| Part Number | 54AC174 | |
| Description | Hex D Flip-Flop | |
| Manufacturers | National Semiconductor | |
| Logo |  |
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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
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100277
www.national.com
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AC Electrical Characteristics
Symbol
Parameter
VCC
(V)
(Note 8)
fmax Maximum Clock
Frequency
tPLH Propagation Delay
CP to Qn
tPHL Propagation Delay
CP to Qn
tPHL Propagation Delay
MR to Qn
Note 8: Voltage Range 3.3 is 3.3V ±0.3V
Voltage Range 5.0 is 5.0V ±0.5V
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
AC Operating Requirements
Symbol
Parameter
ts Setup Time, HIGH or LOW
Dn to CP
th Hold Time, HIGH or LOW
Dn to CP
tw MR Pulse Width, LOW
tw CP Pulse Width
trec Recovery Time
MR to CP
Note 9: Voltage Range 3.3 is 3.3V ±0.3V
Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 9)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
AC Electrical Characteristics
Symbol
Parameter
fmax Maximum Clock
Frequency
tPLH Propagation Delay
CP to Qn
tPHL Propagation Delay
CP to Qn
tPHL Propagation Delay
MR to Qn
Note 10: Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 10)
5.0
5.0
5.0
5.0
54AC
TA = −55˚C to +125˚C
CL = 50 pF
Min Max
65
90
1.0 14.0
1.5 10.5
1.0 13.0
1.5 10.0
1.0 13.5
1.5 11.0
54AC
TA = −55˚C
to +125˚C
CL = 50 pF
Guaranteed Minimum
7.5
5.5
3.0
3.0
7.0
5.0
7.0
5.0
3.0
2.0
54ACT
TA = −55˚C to +125˚C
CL = 50 pF
Min Max
95
1.5 12.5
1.5 13.0
1.5 12.0
5
Units
MHz
ns
ns
ns
Fig.
No.
Units
ns
ns
ns
ns
ns
Fig.
No.
Units
MHz
ns
ns
ns
Fig.
No.
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| Information | Total 8 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 54AC174.PDF Datasheet ] | |
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