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. 806-3295
Mfr. Part No.MC14528BDR2G
HK$2.946
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
New
RS Stock No. 186-9200
Mfr. Part No.MC14521BDG
HK$5.736
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. 178-7557
Mfr. Part No.74VHC123AMX
HK$3.409
Each (On a Reel of 2500)
units
74VHC Monostable Multivibrator 2 -25mA 25mA 90 μs 29.5ns 0.04mA Surface Mount SOIC 16 9.9 x 3.9 x 1.45mm 1.45mm 9.9mm
New
RS Stock No. 186-8822
Mfr. Part No.MC100EL32DG
HK$44.003
Each (In a Tube of 98)
units
ECL Divider 2 - - - - - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm
RS Stock No. 518-9445
Mfr. Part No.MC14528BDG
HK$13.66
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. 688-1549
Mfr. Part No.MC14538BDR2G
HK$5.148
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
New
RS Stock No. 186-8798
Mfr. Part No.74VHC123AM
HK$4.375
Each (In a Tube of 48)
units
VHC Monostable Multivibrator 8 -8mA 8mA 5 ns 29.5 ns @ 50 pF 40µA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 806-3302
Mfr. Part No.MC14538BDTR2G
HK$4.042
Each (On a Tape of 20)
units
MC Monostable Multivibrator 2 -0.36mA 2.4mA 10 μs 600 ns@ 50 pF - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm
New
RS Stock No. 186-9164
Mfr. Part No.MC100EL32DG
HK$53.71
Each (In a Pack of 2)
units
ECL Divider 2 - - - - - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm
New
RS Stock No. 186-8851
Mfr. Part No.MC14521BDG
HK$5.62
Each (In a Tube of 48)
units
- Frequency Divider - - - 120 ns 2600 ns @ 50 pF 150µA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
New
RS Stock No. 184-4260
Mfr. Part No.MC14538BDWG
HK$4.635
Each (In a Tube of 47)
units
4000 Monostable Multivibrator 2 -4.2 (Minimum)mA 4.2 (Minimum)mA 5 ns 600 ns @ 50 pF 600µA Surface Mount SOIC 16 10.45 x 7.6 x 2.4mm 2.4mm 10.45mm
RS Stock No. 178-4724
Mfr. Part No.MC14528BDG
HK$3.635
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. 170-3571
Mfr. Part No.MC14528BDR2G
HK$2.022
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
New
RS Stock No. 186-9259
Mfr. Part No.74VHC123AM
HK$4.379
Each (In a Pack of 25)
units
VHC Monostable Multivibrator 8 -8mA 8mA 5 ns 29.5 ns @ 50 pF 40µA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 761-4381
Mfr. Part No.74VHC123AMX
HK$2.802
Each (In a Pack of 10)
units
74VHC Monostable Multivibrator 2 -25mA 25mA 90 μs 29.5ns 0.04mA Surface Mount SOIC 16 9.9 x 3.9 x 1.45mm 1.45mm 9.9mm
RS Stock No. 125-0045
Mfr. Part No.MC74HC4538ADG
HK$3.845
Each (In a Tube of 48)
units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 10 ns 295 ns @ 50 pF 0.35mA Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm
RS Stock No. 170-3421
Mfr. Part No.MC14538BDR2G
HK$2.022
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. 145-3681
Mfr. Part No.MC14538BDTR2G
HK$1.818
Each (On a Reel of 2500)
units
MC Monostable Multivibrator 2 -0.36mA 2.4mA 10 μs 600 ns @ 50 pF - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm