TECHNICAL DATA
IN74123
Dual Monostable Multivibrator
with Clear
The IN74123 multivibrator feature d-c triggering from gated low-
level-active (A) and high-level-active (B) inputs, and also provide
overriding direct clear inputs. Complementary outputs are provided. The
retrigger capability simplifies the output pulse is terminated, the output
pulse may be extended. The overriding clear capability permits any output
pulse to be terminated at a predetermined time independently of the
timing components R and C. Figure 1 illustrates triggering the one-shot
with the high-level-active (B) inputs.
ORDERING INFORMATION
IN74123N Plastic
LOGIC DIAGRAM
T
A
= -10° to 70° C for package
PIN ASSIGNMENT
Pin 16 = V
CC
Pin 8 = GND
FUNCTION TABLE
Inputs
Clear
L
X
X
H
H
L
X = don’t care
A
X
H
X
L
H
H
B
X
X
L
Outputs
Q
L
L
L
Q
H
H
H
Timing Component
Connections when
C
EXT
≤
1000 pF
Timing Component Connections when
C
EXT >
1000 pF and Clear is used
1
IN74123
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
Tstg
*
Parameter
Supply Voltage
Input Voltage
Storage Temperature Range
Value
6.0
-0.5 to 6.0
-65 to +150
Unit
V
V
°C
Maximum Ratings are those values beyond which damage to the device may accur.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IH
V
IL
I
OL
I
OH
R
EXT
C
EXT
R
EXT
/C
EXT
T
A
t
W
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
Low Level Output Current
High Level Output Current
External Timing Resistance
External Capacitance
Wiring Capacitance at R
EXT
/C
EXT
Terminale
Operating Temperature
Pulse Width
A or B inputs high
A or B inputs low
Clear low
-10
40
40
40
5.0
Parameter
Min
4.75
2.0
0.8
16
-0.8
50
50
+70
50
50
50
No Restriction
pF
°C
ns
Max
5.25
Unit
V
V
V
mA
mA
kΩ
DC ELECTRICAL CHARACTERISTICS
(T
A
=+25°C)
Symbol
V
IK
V
OH
V
OL
I
IH
I
I
I
IL
I
OS
Parameter
Input Clamp Voltage
High-Level Output
Voltage
Low-Level Output
Voltage
High Level Input
Current
Input Current at
Maximum Input Voltage
Low Level Input
Current
Short Circuit Current
One Output Shorted at a
Time
Supply Current
Test Conditions
V
CC
=min, I
IN
=-12 mA
V
CC
=min, I
OH
=-0.8 mA
V
IL
=0.8 V, V
IH
=2.0 V
V
CC
=min, I
OL
=16 mA
V
IL
=0.8 V, V
IH
=2.0 V
V
CC
=max,
V
IN
=2.4V
A, B inputs
Clear input
2.4
3.5
0.3
0.4
40
80
1.0
-1.6
-3.2
-10
-40
mA
mA
mA
Guaranteed Limit
Min
Typ
Max
-1.5
V
V
V
µA
Unit
V
CC
=max, V
IN
=5.5 V
V
CC
=max,
V
IN
=0.4V
A, B inputs
Clear input
V
CC
=max, V
O
=0 V
I
CC
V
CC
=max
47
66
mA
2
IN74123
AC ELECTRICAL CHARACTERISTICS
(V
CC
=5.0 V, T
A
=+25°C, Input t
r
=t
f
=6.0 ns)
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
WQmin
t
WQ
Parameter
Propagation Delay, A to Q
Propagation Delay, A to Q
Propagation Delay, B to Q
Propagation Delay, B to Q
Propagation Delay, Clear to Q
Propagation Delay, Clear to Q
Pulse Width, A or B to Q
Pulse Width, A or B to Q
C
EXT
=1000 pF,
R
EXT
=10 kΩ,
R
L
=390
Ω,C
L
=15 pF
2.76
C
EXT
=0, R
EXT
=5.1 kΩ,
C
L
=15 pF,R
L
=390
Ω
Test Conditions
Guaranteed Limit
Min
Typ
32
30
19
27
30
18
45
3.2
Max
33
40
28
36
40
27
65
3.37
ns
ns
ns
ns
ns
ns
ns
µs
Unit
NOTE: Retrigger pulse must not start before 0.22 C
EXT
(in picofarads) nonoseconds after previous trigger pulse.
Figure 1. Typical Input/Output Pulses
3
IN74123
Figure 2. Switching Waveforms
Figure 3. Switching Waveforms
NOTES A. C
L
includes probe and jig capacitance.
B. All diodes are 1N916 or 1N3064/
Figure 4. Test Circuit
4
IN74123
N SUFFIX PLASTIC
(MS - 001BB)
A
16
9
B
1
8
F
L
C
-T-
SEATING
PLANE
N
G
D
0.25 (0.010) M T
K
M
H
J
Dimensions, mm
Symbol
A
B
C
1. .
D
F
G
H
J
K
L
M
N
0°
2.92
7.62
0.20
0.38
0.36
1.14
2.54
7.62
10°
3.81
8.26
0.36
NOTES:
Dimensions “A”, “B” do not include mold flash or
protrusions. Maximum mold flash or protrusions 0.25 mm
(0.010) per side
MIN
18.67
6.10
MAX
19.69
7.11
5.33
0.56
1.78
5
FPGA/CPLD
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