Monostable Multivibrators

Monostable multivibrators, also known as one-shot multivibrators, are a type of IC (integrated 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. This type of IC can also be considered as a 1/2 astable type multivibrator.

What are monostable multivibrators used for?

This type of IC is 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 a monostable multivibrator, they are;

  • Retriggerable monostable multivibrators will remain in the unstable state with repeated application of the trigger pulse.
  • Non-re-triggerable 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. 368-5654
Mfr. Part No.SN74121N
kr 38,037
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. 305-591
Mfr. Part No.SN74121N
kr 44,90
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. 145-1086
Mfr. Part No.CD74HC123E
kr 4,827
Each (In a Tube of 25)
Units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 17 ns 320 ns @ 2 V 0.008mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 709-2071
Mfr. Part No.CD74HC123E
kr 5,848
Each (In a Pack of 5)
Units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 17 ns 320 ns @ 2 V 0.008mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 527-467
Mfr. Part No.CD14538BE
kr 5,396
Each (In a Tube of 25)
Units
4000 Monostable Multivibrator 2 - - 30 ns 600 ns @ 5 V 0.1mA Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm
RS Stock No. 640-131
Mfr. Part No.SN74LS221N
kr 14,35
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. 170-3571
Mfr. Part No.MC14528BDR2G
Brandonsemi
kr 3,008
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
kr 40,55
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. 178-6975
Mfr. Part No.74HC423D,652
BrandNexperia
kr 5,884
Each (In a Tube of 50)
Units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 17 ns 255 ns @ 2 V 0.008mA Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm
New
RS Stock No. 218-4617
Mfr. Part No.SN74LVC1G123DCUT
kr 8,686
Each (In a Pack of 10)
Units
- Monostable Multivibrator 4 ?32mA 32mA - - - - VSSOP 8 - - -
RS Stock No. 171-3330
Mfr. Part No.74VHC221AFT
BrandToshiba
kr 0,932
Each (On a Reel of 2500)
Units
74VHC Monostable Multivibrator 27 -8mA 8mA 5 ns 24.5ns 80µA Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm
RS Stock No. 922-2833
Mfr. Part No.SN74LS123DR
kr 2,672
Each (On a Reel of 2500)
Units
LS Monostable Multivibrator 2 -0.4mA 8mA 40 ns 56 ns @ 5 V 12mA Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm
RS Stock No. 153-2888
Mfr. Part No.74HC123PW-Q100,118
BrandNexperia
kr 1,034
Each (In a Pack of 25)
Units
74HC Monostable Multivibrator 2 -5.2mA 5.2mA 26 ns 385 ns @ 50 pF - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm
RS Stock No. 760-3397
Mfr. Part No.LTC6993CS6-1#TRMPBF
kr 35,44
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. 806-3295
Mfr. Part No.MC14528BDR2G
Brandonsemi
kr 5,719
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. 483-6588
Mfr. Part No.74HC423D,652
BrandNexperia
kr 6,632
Each (In a Pack of 5)
Units
HC Monostable Multivibrator 2 -5.2mA 5.2mA 17 ns 255 ns@ 2 V 0.008mA Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm
RS Stock No. 151-3348
Mfr. Part No.74HC123PW,118
BrandNexperia
kr 1,624
Each (On a Reel of 2500)
Units
HC Monostable Multivibrator 2 -4mA 4mA 26 ns 385 ns @ 15 pF - Surface Mount TSSOP16 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm
RS Stock No. 662-7358
Mfr. Part No.CD74HCT423M96
kr 1,804
Each (In a Pack of 5)
Units
HCT Monostable Multivibrator 2 -4mA 4mA 20 ns 68 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
kr 8,524
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. 662-9635
Mfr. Part No.CD4047BM
kr 5,718
Each (In a Pack of 5)
Units
4000 Monostable Multivibrator 1 - - 50 ns 1000 ns @ 5 V 0.02mA Surface Mount SOIC 14 8.65 x 3.91 x 1.58mm 1.58mm 8.65mm