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 197-7573
Tillv. art.nrTLC555CP
VarumärkeTexas Instruments
5,797 kr
Each (In a Tube of 50)
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Surface Mount - PDIP 1 8 2MHz - - - - - - - -
RS-artikelnummer 145-5776
Tillv. art.nrTLC556ID
VarumärkeTexas Instruments
11,482 kr
Each (In a Tube of 50)
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Surface Mount Standard SOIC 2 14 2MHz 3 V 18 V -40 °C 85 °C - 100mA -10mA -
RS-artikelnummer 662-4687
Tillv. art.nrTLC556ID
VarumärkeTexas Instruments
12,636 kr
Each (In a Pack of 5)
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Surface Mount Standard SOIC 2 14 2MHz 3 V 18 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 197-7393
Tillv. art.nrNE555DR
VarumärkeTexas Instruments
2,244 kr
Each (In a Pack of 50)
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- - SOIC 1 8 - - - - - - - - -
RS-artikelnummer 178-5476
Tillv. art.nrSE556J
VarumärkeTexas Instruments
128,64 kr
Each (In a Tube of 10)
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Through Hole Standard CDIP 2 14 - 4.5 V 18 V -55 °C +125 °C 24mA 200mA -200mA -
RS-artikelnummer 156-5697
Tillv. art.nrLTC6993CS6-4#TRMPBF
VarumärkeAnalog Devices
33,983 kr
Each (On a Reel of 500)
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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 921-5677
Tillv. art.nrIS82C54-10Z
250,12 kr
Each
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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-artikelnummer 921-0745
Tillv. art.nrNA555S-13
VarumärkeDiodesZetex
3,295 kr
Each (In a Pack of 30)
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Surface Mount Precision SOIC 1 8 - 4.5 V 16 V -40 °C +105 °C - 200mA -200mA -
RS-artikelnummer 910-1705
Tillv. art.nrMIC1557YM5-TR
VarumärkeMicrochip
6,876 kr
Each (In a Pack of 10)
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Surface Mount Precision, Standard SOT-23 1 5 5MHz 2.7 V 18 V -40 °C +85 °C - 20mA -20mA -
RS-artikelnummer 197-7334
Tillv. art.nrLMC555CM/NOPB
VarumärkeTexas Instruments
9,905 kr
Each (In a Tube of 95)
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- - SOIC 1 8 3MHz - - - - - - - -
RS-artikelnummer 825-3564
Tillv. art.nrTLC552CD
VarumärkeTexas Instruments
12,20 kr
Each (In a Pack of 5)
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Surface Mount Monolithic SOIC 2 14 2MHz 1 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 188-9296
Tillv. art.nrTS556IDTTR
VarumärkeSTMicroelectronics
9,82 kr
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Surface Mount - SO 2 14 2.7MHz 2 V 16 V -40 °C +125 °C - 8mA -2mA 100 ns @ 10 pF
RS-artikelnummer 197-7495
Tillv. art.nrSE555JG
VarumärkeTexas Instruments
88,283 kr
Each (In a Tube of 50)
Enheter
- - CDIP 1 8 - - - - - - - - -
RS-artikelnummer 923-1405
Tillv. art.nrIS82C54Z
157,928 kr
Each (In a Tube of 37)
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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 145-0016
Tillv. art.nrCD4536BEE4
VarumärkeTexas Instruments
1,994 kr
Each (In a Tube of 25)
Enheter
Through Hole Programmable PDIP 1 16 - 3 V 18 V -55 °C +125 °C 0.1mA 4.2mA -4.2mA 8000 ns @ 5 V
RS-artikelnummer 191-4848
Tillv. art.nrICM7556IPD+
VarumärkeMaxim Integrated
45,91 kr
Each (In a Pack of 5)
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Through Hole Monolithic PDIP 2 14 - 2 V 16.5 V -20 °C +85 °C - 3.2mA 2mA -
RS-artikelnummer 169-8718
Tillv. art.nrLM555CN
VarumärkeON Semiconductor
2,003 kr
Each (On a Reel of 3000)
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Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS-artikelnummer 662-3996
Tillv. art.nrCD4536BPWR
VarumärkeTexas Instruments
3,205 kr
Each (In a Pack of 10)
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Surface Mount Programmable TSSOP 1 16 - 3 V 18 V -55 °C +125 °C 0.1mA 4.2mA -4.2mA 8000 ns@ 5 V
RS-artikelnummer 196-2111
Tillv. art.nrTS555IDTTR
VarumärkeSTMicroelectronics
4,111 kr
Each (On a Reel of 2500)
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Surface Mount Monostable SO 2 8 2.7MHz 2 V 16 V -40 °C +125 °C - 1mA -0.3mA -
RS-artikelnummer 698-7127
Tillv. art.nrDS1682S+
VarumärkeMaxim Integrated
52,53 kr
Each
Enheter
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
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