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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Beskrivning Pris 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-artikelnummer 190-4887
Tillv. art.nrICM7556ISD+
VarumärkeMaxim Integrated
30,464 kr
Each (In a Tube of 50)
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Surface Mount Astable, RC Monostable SOIC 1 14 - 2 V 18 V -20 °C +85 °C - - - -
RS-artikelnummer 190-4883
Tillv. art.nrDS1100LZ-50+
VarumärkeMaxim Integrated
40,512 kr
Each (In a Tube of 100)
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Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-artikelnummer 190-4888
Tillv. art.nrMAX7375AXR805+T
VarumärkeMaxim Integrated
7,652 kr
Each (On a Reel of 2500)
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Surface Mount - SC-70 - 3 9.99MHz 2.7 V 5.5 V -40 °C +125 °C - - - -
RS-artikelnummer 921-5541
Tillv. art.nrIS82C54Z
177,33 kr
Each
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Surface Mount Programmable PLCC 1 28 8MHz 4.5 V 5.5 V -40 °C +85 °C - 2.5mA -2.5mA 150 ns @ 5 V
RS-artikelnummer 806-2835
Tillv. art.nrLM555CN
VarumärkeON Semiconductor
5,002 kr
Each (In a Tube of 50)
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Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-artikelnummer 162-9390
Tillv. art.nrMC1455DR2G
VarumärkeON Semiconductor
1,259 kr
Each (On a Reel of 2500)
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Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-artikelnummer 197-7574
Tillv. art.nrTLC555CP
VarumärkeTexas Instruments
6,957 kr
Each (In a Pack of 25)
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Surface Mount - PDIP 1 8 2MHz - - - - - - - -
RS-artikelnummer 190-4884
Tillv. art.nrICM7240IPE+
VarumärkeMaxim Integrated
59,128 kr
Each (In a Tube of 25)
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Through Hole Fixed, Programmable PDIP 1 16 - 2 V 16 V -20 °C +85 °C - - - -
RS-artikelnummer 858-0891
Tillv. art.nrLTC6993CS6-4#TRMPBF
VarumärkeAnalog Devices
32,054 kr
Each (In a Pack of 5)
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Surface Mount Monostable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 28 ns@ 5 pF
RS-artikelnummer 122-3283
Tillv. art.nrNE555S-13
VarumärkeDiodesZetex
0,892 kr
Each (On a Reel of 2500)
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Surface Mount Programmable SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
RS-artikelnummer 189-7189
Tillv. art.nrICM7555IPA+
VarumärkeMaxim Integrated
24,752 kr
Each (In a Tube of 50)
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Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
RS-artikelnummer 190-4885
Tillv. art.nrICM7242IPA+
VarumärkeMaxim Integrated
35,541 kr
Each (In a Tube of 50)
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Through Hole Fixed, Programmable PDIP 1 8 - 2 V 16 V 0 °C +85 °C - - - -
RS-artikelnummer 709-2110
Tillv. art.nrSE555P
VarumärkeTexas Instruments
5,17 kr
Each (In a Pack of 5)
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Through Hole Standard PDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS-artikelnummer 197-7395
Tillv. art.nrNE556DR
VarumärkeTexas Instruments
3,238 kr
Each (In a Pack of 25)
Enheter
- - SOIC 1 14 - - - - - - - - -
RS-artikelnummer 190-5952
Tillv. art.nrICM7556ISD+
VarumärkeMaxim Integrated
35,86 kr
Each (In a Pack of 5)
Enheter
Surface Mount Astable, RC Monostable SOIC 1 14 - 2 V 18 V -20 °C +85 °C - - - -
RS-artikelnummer 178-7003
Tillv. art.nrHEF4541BT,512
VarumärkeNexperia
4,542 kr
Each (In a Tube of 57)
Enheter
Surface Mount Programmable SOIC 1 14 36MHz 3 V 15 V -40 °C +85 °C - 4.2mA -4.2mA 1150 ns @ 5 V
RS-artikelnummer 190-5939
Tillv. art.nrICM7555ESA+
VarumärkeMaxim Integrated
19,677 kr
Each (In a Pack of 10)
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Surface Mount Astable, RC Monostable SOIC 1 8 - 2 V 18 V -40 °C +85 °C - - - -
RS-artikelnummer 923-6712
Tillv. art.nrCD4541BE
VarumärkeTexas Instruments
3,747 kr
Each (In a Tube of 25)
Enheter
Through Hole Programmable PDIP 1 14 0.1MHz 3 V 18 V -55 °C +125 °C 0.1mA 12.6mA -12.6mA 18000 ns @ 5 V
RS-artikelnummer 145-7365
Tillv. art.nrTLC556MD
VarumärkeTexas Instruments
15,02 kr
Each (In a Tube of 50)
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Surface Mount Standard SOIC 2 14 2MHz 5 V 18 V -55 °C +125 °C - 100mA -10mA -
RS-artikelnummer 787-8709
Tillv. art.nrMC1455BDR2G
VarumärkeON Semiconductor
3,64 kr
Each (In a Pack of 10)
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Surface Mount Standard SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA - 200mA -
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