Timer Circuits

Timer circuits are used to control sequences of events in electronic systems. They work by changing the circuit from one state to another in advance. 


Applications for timer circuits

You can use timer circuits for basic timing functions, like turning a light on for a certain amount of time or creating a flashing light. They can also be used to create musical notes of a particular frequency.


555 timers

The most widespread type of timer circuit is the 555 timer, which is made up of an eight-pin dual in-line package containing 25 transistors, two diodes and 16 resistors. They can be used as either astable or monostable timers: 

  • Monostable: Often called a one-shot timer, a monostable timer stays on for a certain length of time and then turns off. The timing process starts when the timer is switched on.
  • Astable: An astable timer is switched on to provide a constant on/off digital output. The timer can be used make an LED flash, and the rate of flashing is determined by a capacitor in the circuit.

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Omschrijving Prijs Mounting Type Timer Type Package Type Number of Internal Timers Pin Count Maximum Input Frequency Minimum Operating Supply Voltage Maximum Operating Supply Voltage Minimum Operating Temperature Maximum Operating Temperature Maximum Quiescent Current Maximum Low Level Output Current Maximum High Level Output Current Maximum Propagation Delay Time @ Maximum CL
RS-stocknr. 806-2835
FabrikantnummerLM555CN
FabrikantON Semiconductor
0,363 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-stocknr. 169-8718
FabrikantnummerLM555CN
FabrikantON Semiconductor
0,147 €
Each (On a Reel of 3000)
Aantal stuks
Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-stocknr. 806-2832
FabrikantnummerLM555CM
FabrikantON Semiconductor
0,353 €
Each (In a Tube of 90)
Aantal stuks
Surface Mount Reset SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-stocknr. 862-9218
FabrikantnummerFT8010UMX
FabrikantON Semiconductor
0,61 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Reset UMLP 1 10 - 1.8 V 5 V -40 °C +85 °C 20µA 50mA -50mA 310ns
RS-stocknr. 166-2846
FabrikantnummerFT3001MPX
FabrikantON Semiconductor
0,328 €
Each (On a Reel of 3000)
Aantal stuks
Surface Mount Reset MLP 4 8 - 1.8 V 5 V -40 °C +85 °C 1µA 500mA -500µA 7.2ns
RS-stocknr. 688-1543
FabrikantnummerMC14541BDR2G
FabrikantON Semiconductor
0,412 €
Each (In a Pack of 5)
Aantal stuks
Surface Mount Programmable SOIC 1 14 3MHz 3 V 18 V -55 °C +125 °C 0.02mA 19.3mA -16.3mA 18000 ns@ 5 V
RS-stocknr. 518-9518
FabrikantnummerMC14541BDG
FabrikantON Semiconductor
2,06 €
Each
Aantal stuks
Surface Mount Programmable SOIC 1 14 3MHz 3 V 18 V -55 °C +125 °C 0.02mA 19.3mA -16.3mA 18000 ns@ 5 V
RS-stocknr. 162-9390
FabrikantnummerMC1455DR2G
FabrikantON Semiconductor
0,148 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 178-4795
FabrikantnummerMC14541BDG
FabrikantON Semiconductor
0,294 €
Each (In a Tube of 55)
Aantal stuks
Surface Mount Programmable SOIC 1 14 3MHz 3 V 18 V -55 °C +125 °C 0.02mA 19.3mA -16.3mA 18000 ns @ 5 V
RS-stocknr. 145-4759
FabrikantnummerMC1455BDR2G
FabrikantON Semiconductor
0,172 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA - 200mA -
RS-stocknr. 518-9518A
FabrikantnummerMC14541BDG
FabrikantON Semiconductor
0,242 €
Each (In a Pack of 55)
Aantal stuks
Surface Mount Programmable SOIC 1 14 3MHz 3 V 18 V -55 °C +125 °C 0.02mA 19.3mA -16.3mA 18000 ns@ 5 V
RS-stocknr. 787-8702
FabrikantnummerMC1455DG
FabrikantON Semiconductor
0,366 €
Each (In a Pack of 14)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 178-4703
FabrikantnummerLM555CM
FabrikantON Semiconductor
0,253 €
Each (In a Tube of 100)
Aantal stuks
Surface Mount Reset SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-stocknr. 787-8706
FabrikantnummerMC1455DR2G
FabrikantON Semiconductor
0,209 €
Each (In a Pack of 20)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 772-9313
FabrikantnummerFT7522L6X
FabrikantON Semiconductor
0,373 €
Each (In a Pack of 25)
Aantal stuks
Surface Mount Reset MicroPak 1 6 - 1.8 V 5 V -40 °C +85 °C 1µA 50mA -50µA 9ns
RS-stocknr. 787-8709
FabrikantnummerMC1455BDR2G
FabrikantON Semiconductor
0,386 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA - 200mA -
RS-stocknr. 772-9310
FabrikantnummerFT3001MPX
FabrikantON Semiconductor
0,302 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Reset MLP 4 8 - 1.8 V 5 V -40 °C +85 °C 1µA 500mA -500µA 7.2ns
RS-stocknr. 166-3544
FabrikantnummerFT8010UMX
FabrikantON Semiconductor
0,336 €
Each (On a Reel of 5000)
Aantal stuks
Surface Mount Reset UMLP 1 10 - 1.8 V 5 V -40 °C +85 °C 20µA 50mA -50mA 310ns
RS-stocknr. 166-3192
FabrikantnummerFT7522L6X
FabrikantON Semiconductor
0,158 €
Each (On a Reel of 5000)
Aantal stuks
Surface Mount Reset MicroPak 1 6 - 1.8 V 5 V -40 °C +85 °C 1µA 50mA -50µA 9ns