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
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RS-stocknr. 197-7393
FabrikantnummerNE555DR
€ 0,217
Each (In a Pack of 50)
Aantal stuks
- - SOIC - 8 - - - - - - - - -
Nieuw
RS-stocknr. 190-5952
FabrikantnummerICM7556ISD+
FabrikantMaxim Integrated
€ 3,798
Each (In a Pack of 5)
Aantal stuks
Surface Mount - SOIC 1 14 - 2 V 18 V -20 °C +85 °C - - - -
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RS-stocknr. 189-7189
FabrikantnummerICM7555IPA+
FabrikantMaxim Integrated
€ 2,562
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
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RS-stocknr. 197-7307
FabrikantnummerLM555CN/NOPB
€ 0,826
Each (In a Tube of 40)
Aantal stuks
- - PDIP - 8 - - - - - - - - -
RS-stocknr. 829-1516
FabrikantnummerSTWD100YNPWY3F
€ 0,735
Each (In a Pack of 10)
Aantal stuks
Surface Mount Watchdog SOT-23 1 5 - 2.7 V 5.5 V -40 °C +125 °C - - - -
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RS-stocknr. 190-4883
FabrikantnummerDS1100LZ-50+
FabrikantMaxim Integrated
€ 3,956
Each (In a Tube of 100)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
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RS-stocknr. 190-5939
FabrikantnummerICM7555ESA+
FabrikantMaxim Integrated
€ 1,398
Each (In a Pack of 10)
Aantal stuks
Surface Mount - SOIC 1 8 - 2 V 18 V -40 °C +85 °C - - - -
RS-stocknr. 145-1051
FabrikantnummerCD4541BM
€ 0,35
Each (In a Tube of 50)
Aantal stuks
Surface Mount Programmable SOIC 1 14 0.1MHz 3 V 18 V -55 °C +125 °C 0.1mA 12.6mA -12.6mA 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
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RS-stocknr. 190-4879
FabrikantnummerDS1023S-200+
FabrikantMaxim Integrated
€ 11,382
Each (In a Tube of 46)
Aantal stuks
Surface Mount Programmable SOIC 1 16 10MHz 4.75 V 5.25 V 0 °C +70 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 921-5377
FabrikantnummerICM7556IPDZ
€ 1,41
Each (In a Pack of 5)
Aantal stuks
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 188-9229
FabrikantnummerTS556IDTTR
€ 0,447
Each (On a Reel of 2500)
Aantal stuks
Surface Mount - SO 2 14 2.7MHz 2 V 16 V -40 °C +125 °C - 8mA -2mA 100 ns @ 10 pF
RS-stocknr. 858-0891
FabrikantnummerLTC6993CS6-4#TRMPBF
FabrikantAnalog Devices
€ 3,494
Each (In a Pack of 5)
Aantal stuks
Surface Mount Monostable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 28 ns@ 5 pF
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RS-stocknr. 190-4884
FabrikantnummerICM7240IPE+
FabrikantMaxim Integrated
€ 4,686
Each (In a Tube of 25)
Aantal stuks
Through Hole - PDIP 1 16 - 2 V 16 V -20 °C +85 °C - - - -
RS-stocknr. 662-4668
FabrikantnummerCD4541BM
€ 0,392
Each (In a Pack of 10)
Aantal stuks
Surface Mount Programmable SOIC 1 14 0.1MHz 3 V 18 V -55 °C +125 °C 0.1mA 12.6mA -12.6mA 18000 ns@ 5 V
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RS-stocknr. 190-5904
FabrikantnummerDS1023S-200+
FabrikantMaxim Integrated
€ 14,73
Each
Aantal stuks
Surface Mount Programmable SOIC 1 16 10MHz 4.75 V 5.25 V 0 °C +70 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 825-3564
FabrikantnummerTLC552CD
€ 1,542
Each (In a Pack of 5)
Aantal stuks
Surface Mount Monolithic SOIC 2 14 2MHz 1 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 165-8649
FabrikantnummerSA555S-13
FabrikantDiodesZetex
€ 0,111
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Precision, Reset SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C - 200mA -200mA -
Nieuw
RS-stocknr. 197-7334
FabrikantnummerLMC555CM/NOPB
€ 0,942
Each (In a Tube of 95)
Aantal stuks
- - SOIC - 8 - - - - - - - - -
Nieuw
RS-stocknr. 197-7335
FabrikantnummerLMC555CM/NOPB
€ 0,951
Each (In a Pack of 10)
Aantal stuks
- - SOIC - 8 - - - - - - - - -
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