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. 169-8718
FabrikantnummerLM555CN
FabrikantON Semiconductor
€ 0,194
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. 806-2835
FabrikantnummerLM555CN
FabrikantON Semiconductor
€ 0,474
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. 534-3992
FabrikantnummerLMC555CM/NOPB
€ 2,21
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
RS-stocknr. 121-8803
FabrikantnummerLMC555CM/NOPB
€ 0,915
Each (In a Tube of 95)
Aantal stuks
Surface Mount Standard SOIC 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns @ 5 V
RS-stocknr. 923-1477
FabrikantnummerCS82C54-10Z96
€ 6,048
Each (On a Reel of 750)
Aantal stuks
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
RS-stocknr. 921-5582
FabrikantnummerCS82C54-10Z
€ 10,26
Each
Aantal stuks
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
RS-stocknr. 921-5652
FabrikantnummerCS82C54-10Z96
€ 10,45
Each
Aantal stuks
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
RS-stocknr. 170-8196
FabrikantnummerCS82C54-10Z
FabrikantIntersil
€ 9,044
Each (In a Tube of 37)
Aantal stuks
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
RS-stocknr. 528-416
FabrikantnummerNE556N
€ 0,388
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 866-0192
FabrikantnummerLM555CN/NOPB
€ 0,798
Each (In a Tube of 40)
Aantal stuks
Through Hole Adjustable and Monostable PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - - - 100ns
RS-stocknr. 124-4531
FabrikantnummerLM555CN/NOPB
€ 0,876
Each (In a Pack of 10)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 200 (Sink)mA 200 (Source)mA -
RS-stocknr. 698-7127
FabrikantnummerDS1682S+
FabrikantMaxim
€ 4,94
Each
Aantal stuks
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-stocknr. 178-4703
FabrikantnummerLM555CM
FabrikantON Semiconductor
€ 0,248
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. 121-8804
FabrikantnummerLMC555CN/NOPB
€ 0,948
Each (In a Tube of 40)
Aantal stuks
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns @ 5 V
RS-stocknr. 923-5573
FabrikantnummerDS1682S+
FabrikantMaxim
€ 3,504
Each (In a Tube of 100)
Aantal stuks
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-stocknr. 534-4002
FabrikantnummerLMC555CN/NOPB
€ 2,21
Each
Aantal stuks
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
RS-stocknr. 806-2832
FabrikantnummerLM555CM
FabrikantON Semiconductor
€ 0,367
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. 921-5677
FabrikantnummerIS82C54-10Z
€ 21,37
Each
Aantal stuks
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V -40 °C +85 °C - 2.5mA -2.5mA 100 ns @ 5 V
RS-stocknr. 170-8173
FabrikantnummerICM7555IPAZ
€ 0,604
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 168-4873
FabrikantnummerTLC555CD
€ 0,636
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
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