DM74LS174 • DM74LS175 Hex/Quad D-Type Flip-Flops with Clear
August 1992
Revised April 2000
DM74LS174 • DM74LS175
Hex/Quad D-Type Flip-Flops with Clear
General Description
These positive-edge-triggered flip-flops utilize TTL circuitry
to implement D-type flip-flop logic. All have a direct clear
input, and the quad (175) versions feature complementary
outputs from each flip-flop.
Information at the D inputs meeting the setup time require-
ments is transferred to the Q outputs on the positive-going
edge of the clock pulse. Clock triggering occurs at a partic-
ular voltage level and is not directly related to the transition
time of the positive-going pulse. When the clock input is at
either the HIGH or LOW level, the D input signal has no
effect at the output.
Features
s
DM74LS174 contains six flip-flops with single-rail
outputs
s
DM74LS175 contains four flip-flops with double-rail
outputs
s
Buffered clock and direct clear inputs
s
Individual data input to each flip-flop
s
Applications include:
Buffer/storage registers
Shift registers
Pattern generators
s
Typical clock frequency 40 MHz
s
Typical power dissipation per flip-flop 14 mW
Ordering Code:
Order Number
DM74LS174M
DM74LS174SJ
DM74LS174N
DM74LS175M
DM74LS175SJ
DM74LS175N
Package Number
M16A
M16D
N16E
M16A
M16D
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
DM74LS174
DM74LS175
© 2000 Fairchild Semiconductor Corporation
DS006404
www.fairchildsemi.com
DM74LS174 • DM74LS175
Function Table
(Each Flip-Flop)
Inputs
Clear
L
H
H
H
Clock
X
↑
↑
L
D
X
H
L
X
Q
L
H
L
Q
0
Outputs
Q†
H
L
H
Q
0
H
=
HIGH Level (steady state)
L
=
LOW Level (steady state)
X
=
Don’t Care
↑ =
Transition from LOW-to-HIGH level
Q
0
=
The level of Q before the indicated steady-state input conditions were established.
†
=
DM74LS175 only
Logic Diagrams
DM74LS174
DM74LS175
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2
DM74LS174 • DM74LS175
Absolute Maximum Ratings
(Note 1)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
7V
7V
0°C to
+70°C
−65°C
to
+150°C
Note 1:
The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
DM74LS174 Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
f
CLK
f
CLK
t
W
t
SU
t
H
t
REL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Clock Frequency (Note 2)
Clock Frequency (Note 3)
Pulse Width
(Note 4)
Data Setup Time (Note 4)
Data Hold Time (Note 4)
Clear Release Time (Note 4)
Free Air Operating Temperature
Clock
Clear
0
0
20
20
20
0
25
0
70
Parameter
Min
4.75
2
0.8
−0.4
8
30
25
Nom
5
Max
5.25
Units
V
V
V
mA
mA
MHz
MHz
ns
ns
ns
ns
°C
Note 2:
C
L
=
15 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 3:
C
L
=
50 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 4:
T
A
=
25°C and V
CC
=
5V.
DM74LS174 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
V
OL
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level
Output Voltage
I
I
I
IH
I
IL
Conditions
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
V
IL
=
Max, V
IH
=
Min
I
OL
=
4 mA, V
CC
=
Min
Input Current @ Max Input Voltage V
CC
=
Max, V
I
=
7V
HIGH Level Input Current
LOW Level
Input Current
I
OS
I
CC
Short Circuit Output Current
Supply Current
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max
V
I
=
0.4V
V
CC
=
Max (Note 6)
V
CC
=
Max (Note 7)
Clock
Clear
Data
−20
16
2.7
3.4
0.35
0.25
0.5
0.4
0.1
20
−0.4
−0.4
−0.36
−100
26
mA
mA
mA
mA
µA
Min
Typ
(Note 5)
Max
−1.5
Units
V
V
V
Note 5:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 6:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 7:
With all outputs OPEN and 4.5V applied to all data and clear inputs, I
CC
is measured after a momentary ground, then 4.5V applied to the clock.
3
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DM74LS174 • DM74LS175
DM74LS174 Switching Characteristics
at V
CC
=
5V and T
A
=
25°C
From (Input)
Symbol
f
MAX
t
PLH
t
PHL
t
PHL
Parameter
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to Output
Clock to Output
Clear to Output
To (Output)
C
L
=
15 pF
Min
30
30
30
35
Max
R
L
=
2 kΩ
C
L
=
50 pF
Min
25
32
36
42
Max
MHz
ns
ns
ns
Units
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4
DM74LS174 • DM74LS175
DM74LS175 Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
f
CLK
f
CLK
t
W
t
SU
t
H
t
REL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Clock Frequency (Note 8)
Clock Frequency (Note 9)
Pulse Width
(Note 10)
Data Setup Time (Note 10)
Data Hold Time (Note 10)
Clear Release Time (Note 10)
Free Air Operating Temperature
Clock
Clear
0
0
20
20
20
0
25
0
70
Parameter
Min
4.75
2
0.8
−0.4
8
30
25
Nom
5
Max
5.25
Units
V
V
V
mA
mA
MHz
MHz
ns
ns
ns
ns
°C
Note 8:
C
L
=
15 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 9:
C
L
=
50 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 10:
T
A
=
25°C and V
CC
=
5V.
DM74LS175 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
V
OL
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level
Output Voltage
I
I
I
IH
I
IL
Conditions
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
V
IL
=
Max, V
IH
=
Min
I
OL
=
4 mA, V
CC
=
Min
Input Current @ Max Input Voltage V
CC
=
Max, V
I
=
7V
HIGH Level Input Current
LOW Level
Input Current
I
OS
I
CC
Short Circuit Output Current
Supply Current
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max
V
I
=
0.4V
V
CC
=
Max (Note 12)
V
CC
=
Max (Note 13)
Clock
Clear
Data
−20
11
2.7
3.4
0.35
0.25
0.5
0.4
0.1
20
−0.4
−0.4
−0.36
−100
18
mA
mA
mA
mA
µA
Min
Typ
(Note 11)
Max
−1.5
Units
V
V
V
Note 11:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 12:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 13:
With all outputs OPEN and 4.5V applied to all data and clear inputs, I
CC
is measured after a momentary ground, then 4.5V applied to the clock
input.
DM74LS175 Switching Characteristics
at V
CC
=
5V and T
A
=
25°C (See Section 1 for Test Waveforms and Output Load)
From (Input)
Symbol
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
Parameter
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to Q or Q
To (Output)
C
L
=
15 pF
Min
30
30
Max
R
L
=
2 kΩ
C
L
=
50 pF
Min
25
32
Max
MHz
ns
Units
Clock to Q or Q
30
36
ns
Clear to Q
Clear to Q
25
35
29
42
ns
ns
5
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