Monostable Multivibrators

Monostable multivibrators, also known as one-shot multivibrators, are a type of electronic circuit that can be used as a timer. They have one stable and one unstable state. The unstable state is caused by a trigger pulse. This state is transient, so the circuit always returns to stability after a fixed time has elapsed. 


Generally, monostable multivibrator circuits are composed of two transistors, coupled with one resistor-capacitor network and one resistor network. These networks are what determines the length of time before the circuit returns to its stable state, after being triggered. 


What are monostable multivibrators used for?

Monostable multivibrators are used to produce a specific timed delay within a circuit. Therefore, they can broadly be used as timers or as pulse detectors in electronic equipment. 


Types of monostable multivibrators

There are two types of monostable multivibrators:

  • Retriggerable monostable multivibrators will remain in the unstable state with repeated application of the trigger pulse.
  • Non-retriggerable monostable multivibrators are unaffected by further trigger pulses, and will remain in the unstable state only for the predetermined period of time. 

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Description Price Logic Family Logic Function Number of Elements per Chip Maximum High Level Output Current Maximum Low Level Output Current Minimum Pulse Width Maximum Propagation Delay Time @ Maximum CL Maximum Quiescent Current Mounting Type Package Type Pin Count Dimensions Height Length
RS Stock No. 640-131
Mfr. Part No.SN74LS221N
€1.13
Each
units
LS Monostable Multivibrator 2 -0.4mA 8mA 40 ns 80 ns @ 5 V 4.7mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 145-0828
Mfr. Part No.SN74LS221N
€0.96
Each (In a Tube of 25)
units
LS Monostable Multivibrator 2 -0.4mA 8mA 40 ns 80 ns @ 5 V 4.7mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 527-647
Mfr. Part No.CD74HC4538E
€0.529
Each (In a Tube of 25)
units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 14 ns 250 ns @ 2 V 0.008mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 368-5654
Mfr. Part No.SN74121N
€3.297
Each (In a Tube of 25)
units
74 Monostable Multivibrator 1 -0.4mA 16mA 50 ns 80 ns @ 5 V 13mA Through Hole PDIP 14 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 688-1549
Mfr. Part No.MC14538BDR2G
€0.452
Each (In a Pack of 5)
units
4000 Monostable Multivibrator 2 - - 80 ns 600 ns @ 5 V 0.7mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 305-591
Mfr. Part No.SN74121N
€3.49
Each
units
74 Monostable Multivibrator 1 -0.4mA 16mA 50 ns 80 ns @ 5 V 13mA Through Hole PDIP 14 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 170-3421
Mfr. Part No.MC14538BDR2G
€0.151
Each (On a Reel of 2500)
units
4000 Monostable Multivibrator 2 - - 80 ns 600 ns @ 5 V 0.7mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 806-3295
Mfr. Part No.MC14528BDR2G
€0.165
Each (On a Tape of 20)
units
MC Monostable Multivibrator 2 -0.36mA 2.4mA 10 μs 1000 ns @ 50 pF - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 518-9445A
Mfr. Part No.MC14528BDG
€0.495
Each (In a Pack of 48)
units
4000 Monostable Multivibrator 2 - - 55 ns 650 ns @ 5 V 0.02mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 170-3571
Mfr. Part No.MC14528BDR2G
€0.169
Each (On a Reel of 2500)
units
MC Monostable Multivibrator 2 -0.36mA 2.4mA 10 μs 1000 ns @ 50 pF - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 760-3390
Mfr. Part No.LTC6993IS6-1#TRMPBF
€4.84
Each
units
LVCMOS, LVTTL Monostable Multivibrator 1 -16mA 16mA 1 μs 28ns 0.2mA Surface Mount TSOT-23 6 2.9 x 1.75 x 1mm 1mm 2.9mm
RS Stock No. 178-4724
Mfr. Part No.MC14528BDG
€0.453
Each (In a Tube of 48)
units
4000 Monostable Multivibrator 2 - - 55 ns 650 ns @ 5 V 0.02mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 518-9445
Mfr. Part No.MC14528BDG
€2.20
Each
units
4000 Monostable Multivibrator 2 - - 55 ns 650 ns @ 5 V 0.02mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 919-8985
Mfr. Part No.LTC6993IS6-1TRMPBF
€2.256
Each (On a Reel of 500)
units
LVCMOS, LVTTL Monostable Multivibrator 2 -16mA 16mA 1 μs 28ns 0.2mA Surface Mount TSOT-23 6 2.9 x 1.75 x 1mm 1mm 2.9mm
RS Stock No. 662-7169
Mfr. Part No.CD74HC4538PWR
€0.316
Each (In a Pack of 10)
units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 14 ns 250 ns @ 2 V 0.008mA Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm
RS Stock No. 164-6069
Mfr. Part No.LTC6993CS6-2#TRMPBF
€3.305
Each (In a Pack of 2)
units
LTC Monostable Multivibrator 1 -16mA +16mA 1 μs 28 ns @ 5 pF - Surface Mount TSOT-23 6 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm
RS Stock No. 186-9200
Mfr. Part No.MC14521BDG
€0.616
Each (In a Pack of 25)
units
- Frequency Divider - - - 120 ns 2600 ns @ 50 pF 150µA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 162-6973
Mfr. Part No.CD74HCT221M96
€0.221
Each (On a Reel of 2500)
units
HCT Monostable Multivibrator 2 -4mA 4mA 14 ns 42 ns @ 4.5 V 0.008mA Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm
RS Stock No. 663-0385
Mfr. Part No.CD74HC4538E
€0.868
Each (In a Pack of 5)
units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 14 ns 250 ns @ 2 V 0.008mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 170-5405
Mfr. Part No.74LVC1G123DP,125
BrandNexperia
€0.453
Each (In a Pack of 25)
units
74LVC Monostable Multivibrator 1 -32mA 32mA 2.5 ns 20.3 ns @ 50 pF 20µA Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm
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