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 145-1051
Tillv. art.nrCD4541BM
VarumärkeTexas Instruments
3,29 kr
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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-artikelnummer 162-7010
Tillv. art.nrNE555PWR
VarumärkeTexas Instruments
0,719 kr
Each (On a Reel of 2000)
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Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-artikelnummer 921-5595
Tillv. art.nrCS82C54Z
102,68 kr
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Surface Mount Programmable PLCC 1 28 8MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 150 ns @ 5 V
RS-artikelnummer 178-7003
Tillv. art.nrHEF4541BT,512
VarumärkeNexperia
4,542 kr
Each (In a Tube of 57)
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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 185-1005
Tillv. art.nrBD9555FVM-CGTR
VarumärkeROHM
11,053 kr
Each (In a Pack of 10)
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Surface Mount Control MSOP 1 8 - 4.5 V 42 V -40 °C +125 °C - 50mA -10mA -
RS-artikelnummer 190-4883
Tillv. art.nrDS1100LZ-50+
VarumärkeMaxim Integrated
42,689 kr
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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 121-9741
Tillv. art.nrTPL5000DGST
VarumärkeTexas Instruments
6,645 kr
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Surface Mount Programmable VSSOP 1 10 - 1.8 V 5 V -40 °C +105 °C - - - -
RS-artikelnummer 145-0415
Tillv. art.nrTLC551CP
VarumärkeTexas Instruments
16,395 kr
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Through Hole Standard PDIP 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 923-1571
Tillv. art.nrICM7242IPAZ
45,248 kr
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Through Hole Standard PDIP 1 8 13MHz 2 V 16 V -25 °C +85 °C 0.125mA 50mA - -
RS-artikelnummer 197-7307
Tillv. art.nrLM555CN/NOPB
VarumärkeTexas Instruments
8,606 kr
Each (In a Tube of 40)
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- - PDIP 1 8 - - - - - - - - -
RS-artikelnummer 145-7365
Tillv. art.nrTLC556MD
VarumärkeTexas Instruments
15,02 kr
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Surface Mount Standard SOIC 2 14 2MHz 5 V 18 V -55 °C +125 °C - 100mA -10mA -
RS-artikelnummer 662-4003
Tillv. art.nrTLC556CDR
VarumärkeTexas Instruments
10,67 kr
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Surface Mount Standard SOIC 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 197-7395
Tillv. art.nrNE556DR
VarumärkeTexas Instruments
3,238 kr
Each (In a Pack of 25)
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- - SOIC 1 14 - - - - - - - - -
RS-artikelnummer 145-0016
Tillv. art.nrCD4536BEE4
VarumärkeTexas Instruments
1,994 kr
Each (In a Tube of 25)
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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 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 662-4674
Tillv. art.nrTLC551CD
VarumärkeTexas Instruments
18,488 kr
Each (In a Pack of 5)
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Surface Mount Standard SOIC 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 165-8349
Tillv. art.nrNA555S-13
VarumärkeDiodesZetex
1,182 kr
Each (On a Reel of 2500)
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Surface Mount Precision SOIC 1 8 - 4.5 V 16 V -40 °C +105 °C - 200mA -200mA -
RS-artikelnummer 162-8608
Tillv. art.nrLMC555IM/NOPB
VarumärkeTexas Instruments
11,001 kr
Each (In a Tube of 95)
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Surface Mount Reset SOIC 1 8 3MHz 1.5 V 15 V -40 °C +125 °C - -10mA 50mA 100ns
RS-artikelnummer 698-7127
Tillv. art.nrDS1682S+
VarumärkeMaxim Integrated
52,53 kr
Each
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Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-artikelnummer 165-8649
Tillv. art.nrSA555S-13
VarumärkeDiodesZetex
1,147 kr
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Surface Mount Precision, Reset SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C - 200mA -200mA -
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