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SN74LS221 View Datasheet(PDF) - ON Semiconductor

Part NameDescriptionManufacturer
SN74LS221 Dual Monostable Multivibrators with Schmitt−Trigger Inputs ON-Semiconductor
ON Semiconductor ON-Semiconductor
SN74LS221 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
SN74LS221
AC CHARACTERISTICS (VCC = 5.0 V, TA = 25°C)
Symbol
From
(Input)
To
(Output)
Limits
Min Typ Max Unit
A
Q
45 70
tPLH
ns
B
Q
35 55
A
Q
50 80
tPHL
ns
B
Q
40 65
tPHL
Clear
Q
35 55 ns
tPLH
Clear
Q
44 65 ns
70 120 150
tW(out)
A or B
Q or Q
20 47 70 ns
600 670 750
6.0 6.9 7.5 ms
AC SETUP REQUIREMENTS (VCC = 5.0 V, TA = 25°C)
Symbol
dv/dt
Parameter
Rate of Rise or Fall of Input Pulse
Input Pulse Width
tW
ts
Clear-Inactive-State Setup Time
Rext
External Timing Resistance
Cext
External Timing Capacitance
Output Duty Cycle
Schmitt, B
Logic Input, A
A or B, tW(in)
Clear, tW (clear)
RT = 2.0 k
RT = MAX Rext
Test Conditions
CL = 15 pF,
See Figure 1
Cext = 80 pF, Rext = 2.0
Cext = 80 pF, Rext = 2.0
Cext = 0, Rext = 2.0 k
Cext = 100 pF, Rext = 10 k
Cext = 1.0 µF, Rext = 10 k
Limits
Min
Typ
Max
1.0
1.0
40
40
15
1.4
100
0
1000
50
90
Unit
V/s
V/µs
ns
ns
k
µF
%
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