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54LS174 Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce 54LS174
Description  These positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

54LS174 Fiches technique(HTML) 3 Page - Texas Instruments

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Absolute Maximum Ratings (Note)
If MilitaryAerospace specified devices are required
please contact the National Semiconductor Sales
OfficeDistributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b
55 Cto a125 C
DM74LS
0 Cto a70 C
Storage Temperature Range
b
65 Cto a150 C
Note
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
Parameter
DM54LS174
DM74LS174
Units
Min
Nom
Max
Min
Nom
Max
VCC
Supply Voltage
45
5
55
475
5
525
V
VIH
High Level Input Voltage
2
2
V
VIL
Low Level Input Voltage
07
08
V
IOH
High Level Output Current
b
04
b
04
mA
IOL
Low Level Output Current
4
8
mA
fCLK
Clock Frequency (Note 1)
0
30
0
30
MHz
fCLK
Clock Frequency (Note 2)
0
25
0
25
MHz
tW
Pulse Width
Clock
20
20
ns
(Note 6)
Clear
20
20
tSU
Data Setup Time (Note 6)
20
20
ns
tH
Data Hold Time (Note 6)
0
0
ns
tREL
Clear Release Time (Note 6)
25
25
ns
TA
Free Air Operating Temperature
b
55
125
0
70
C
’LS174 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 3)
VI
Input Clamp Voltage
VCC e Min II eb18 mA
b
15
V
VOH
High Level Output
VCC e Min IOH e Max
DM54
25
34
V
Voltage
VIL e Max VIH e Min
DM74
27
34
VOL
Low Level Output
VCC e Min IOL e Max
DM54
025
04
Voltage
VIL e Max VIH e Min
DM74
035
05
V
IOL e 4 mA VCC e Min
DM74
025
04
II
Input Current Max
VCC e Max VI e 7V
01
mA
Input Voltage
IIH
High Level Input Current
VCC e Max VI e 27V
20
m
A
IIL
Low Level Input
VCC e Max
Clock
b
04
Current
VI e 04V
Clear
b
04
mA
Data
b
036
IOS
Short Circuit
VCC e Max
DM54
b
20
b
100
mA
Output Current
(Note 4)
DM74
b
20
b
100
ICC
Supply Current
VCC e Max (Note 5)
16
26
mA
Note 1
CL e 15 pF RL e 2kX TA e 25 C and VCC e 5V
Note 2
CL e 50 pF RL e 2kX TA e 25 C and VCC e 5V
Note 3
All typicals are at VCC e 5V TA e 25 C
Note 4
Not more than one output should be shorted at a time and the duration should not exceed one second
Note 5
With all outputs open and 45V applied to all data and clear inputs ICC is measured after a momentary ground then 45V applied to the clock
Note 6
TA e 25 C and VCC e 5V
2


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