DM74LS109A Dual Positive-Edge-Triggered J-K Flip-Flop with Preset, Clear, and Complementary Outputs
June 1986
Revised March 2000
DM74LS109A
Dual Positive-Edge-Triggered J-K Flip-Flop with
Preset, Clear, and Complementary Outputs
General Description
This device contains two independent positive-edge-trig-
gered J-K flip-flops with complementary outputs. The J and
K data is accepted by the flip-flop on the rising edge of the
clock pulse. The triggering occurs at a voltage level and is
not directly related to the transition time of the rising edge
of the clock. The data on the J and K inputs may be
changed while the clock is HIGH or LOW as long as setup
and hold times are not violated. A low logic level on the
preset or clear inputs will set or reset the outputs regard-
less of the logic levels of the other inputs.
Ordering Code:
Order Number
DM74LS109AM
DM74LS109AN
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.
Connection Diagram
Function Table
Inputs
PR
L
H
L
H
H
H
H
H
CLR
H
L
L
H
H
H
H
H
CLK
X
X
X
↑
↑
↑
↑
L
J
X
X
X
L
H
L
H
X
K
X
X
X
L
L
H
H
X
Q
0
H
Q
0
Q
H
L
L
Toggle
Q
0
L
Q
0
Outputs
Q
L
H
H
H (Note 1) H (Note 1)
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Either LOW or HIGH Logic Level
↑ =
Rising Edge of Pulse
Q
0
=
The output logic level of Q before the indicated input conditions were
established.
Toggle
=
Each output changes to the complement of its previous level on
each active transition of the clock pulse.
Note 1:
This configuration is nonstable; that is, it will not persist when pre-
set and/or clear inputs return to their inactive (HIGH) state.
© 2000 Fairchild Semiconductor Corporation
DS006368
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DM74LS109A
Absolute Maximum Ratings
(Note 2)
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 2:
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
f
CLK
f
CLK
t
W
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Clock Frequency (Note 3)
Clock Frequency (Note 4)
Pulse Width
(Note 3)
t
W
Pulse Width
(Note 4)
t
SU
t
SU
t
H
T
A
Setup Time
(Note 3)(Note 5)
Setup Time
(Note 5)(Note 4)
Hold Time (Note 6)
Free Air Operating Temperature
Clock HIGH
Preset LOW
Clear LOW
Clock HIGH
Preset LOW
Clear LOW
Data HIGH
Data LOW
Data HIGH
Data LOW
0
0
18
15
15
25
20
20
30↑
20↑
35↑
25↑
0↑
0
70
ns
ns
ns
°C
ns
ns
Parameter
Min
4.75
2
0.8
−0.4
8
25
20
Nom
5
Max
5.25
Units
V
V
V
mA
mA
MHz
MHz
Note 3:
C
L
=
15 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 4:
C
L
=
50 pF, R
L
=
2 kΩ, T
A
=
25°C and V
CC
=
5V.
Note 5:
The symbol (↑) indicates the rising edge of the clock pulse is used for reference.
Note 6:
T
A
=
25°C and V
CC
=
5V.
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2
DM74LS109A
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
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
I
I
Input Current @ Max
Input Voltage
V
CC
=
Max
V
I
=
7V
J, K
Clock
Preset
Clear
I
IH
HIGH Level
Input Current
V
CC
=
Max
V
I
=
2.7V
J,K
Clock
Preset
Clear
I
IL
LOW Level
Input Current
V
CC
=
Max
V
I
=
0.4V
J, K
Clock
Preset
Clear
I
OS
I
CC
Short Circuit Output Current
Supply Current
V
CC
=
Max (Note 8)
V
CC
=
Max (Note 9)
−20
4
2.7
3.4
0.35
0.25
0.5
0.4
0.1
0.1
0.2
0.2
20
20
40
40
−0.4
−0.4
−0.8
−0.8
−100
8
mA
mA
mA
µA
mA
Min
Typ
(Note 7)
Max
−1.5
Units
V
V
V
Note 7:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 8:
Not more than one output should be shorted at a time, and the duration should not exceed one second. For devices, with feedback from the outputs,
where shorting the outputs to ground may cause the outputs to change logic state an equivalent test may be performed where V
O
=
2.125V with the minimum
and maximum limits reduced by one half from their stated values. This is very useful when using automatic test equipment.
Note 9:
I
CC
is measured with all outputs OPEN, with CLOCK grounded after setting the Q and Q outputs HIGH in turn.
Switching Characteristics
at V
CC
=
5V and T
A
=
25°C
From (Input)
Symbol
Parameter
To (Output)
C
L
=
15 pF
Min
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
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
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to
Q or Q
Clock to
Q or Q
Clear
to Q
Clear
to Q
Preset
to Q
Preset
to Q
25
25
30
25
30
25
30
Max
20
35
35
35
35
35
35
R
L
=
2 kΩ
C
L
=
50 pF
Min
Max
MHz
ns
ns
ns
ns
ns
ns
Units
3
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DM74LS109A
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
DM74LS109A Dual Positive-Edge-Triggered J-K Flip-Flop with Preset, Clear, and Complementary Outputs
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
5
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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