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DM74LS75 Quad Latch
August 1986
Revised March 2000
DM74LS75
Quad Latch
General Description
These latches are ideally suited for use as temporary stor-
age for binary information between processing units and
input/output or indicator units. Information present at a data
(D) input is transferred to the Q output when the enable is
HIGH, and the Q output will follow the data input as long as
the enable remains HIGH. When the enable goes LOW, the
information (that was present at the data input at the time
the transition occurred) is retained at the Q output until the
enable is permitted to go HIGH.
These latches feature complementary Q and Q outputs
from a 4-bit latch, and are available in 16-pin packages.
Ordering Code:
Order Number
DM74LS75M
DM74LS75N
Package Number
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
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.
Logic Diagram
(Each Latch)
Connection Diagram
Function Table
Inputs
D
L
H
X
(Each Latch)
Outputs
Q
L
H
Q
0
Q
H
L
Q
0
Enable
H
H
L
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
Q
0
=
The Level of Q Before the HIGH-to-LOW Transition of ENABLE
© 2000 Fairchild Semiconductor Corporation
DS006374
www.fairchildsemi.com
DM74LS75
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.
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
t
W
t
SU
t
H
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Enable Pulse Width (Note 5)
Setup Time (Note 5)
Hold Time (Note 5)
Free Air Operating Temperature
20
20
0
0
70
Parameter
Min
4.75
2
0.8
−0.4
8
Nom
5
Max
5.25
Units
V
V
V
mA
mA
ns
ns
ns
°C
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
I
OS
I
CC
Input Current @ Max
Input Voltage
HIGH Level Input
Current
LOW Level Input
Current
Short Circuit Output Current
Supply Current
V
CC
=
Max (Note 2)
V
CC
=
Max (Note 3)
V
CC
=
Max, V
I
=
0.4V
V
CC
=
Max, V
I
=
2.7V
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
V
CC
=
Max, V
I
=
7V
D
Enable
D
Enable
D
Enable
−20
6.3
2.7
3.5
0.35
0.25
0.5
0.4
0.1
0.4
20
80
−0.4
−1.6
−100
12
mA
µA
mA
mA
mA
Min
Typ
(Note 2)
Max
−1.5
Units
V
V
V
Note 2:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 3:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4:
I
CC
is measured with all outputs open and all inputs grounded.
Note 5:
T
A
=
25°C and V
CC
=
5V.
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2
DM74LS75
Switching Characteristics
at V
CC
=
5V and T
A
=
25°C
From (Input)
Symbol
Parameter
To (Output)
C
L
=
15 pF
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
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
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
D to Q
D to Q
Max
27
17
R
L
=
2 kΩ
C
L
=
50 pF
Min
Max
30
25
ns
ns
Units
D to Q
20
25
ns
D to Q
Enable to Q
Enable to Q
15
27
25
20
30
30
ns
ns
ns
Enable to Q
30
30
ns
Enable to Q
15
20
ns
3
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DM74LS75
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M16A
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4
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