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 921-5507
Tillv. art.nrICM7555IBAZ
5,886 kr
Each (In a Pack of 25)
Enheter
Surface Mount Standard SOIC 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-artikelnummer 170-8188
Tillv. art.nrICM7555IBAZ
VarumärkeIntersil
5,258 kr
Each (In a Tube of 98)
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Surface Mount Standard SOIC 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-artikelnummer 534-4002
Tillv. art.nrLMC555CN/NOPB
VarumärkeTexas Instruments
12,41 kr
Each
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Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
RS-artikelnummer 121-8804
Tillv. art.nrLMC555CN/NOPB
VarumärkeTexas Instruments
9,696 kr
Each (In a Tube of 40)
Enheter
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns @ 5 V
RS-artikelnummer 732-1317
Tillv. art.nrSE555JG
VarumärkeTexas Instruments
62,97 kr
Each
Enheter
Through Hole Standard CDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS-artikelnummer 796-8316
Tillv. art.nrTLC555MJG
VarumärkeTexas Instruments
39,05 kr
Each (In a Pack of 2)
Enheter
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS-artikelnummer 920-0177
Tillv. art.nrLTC6994IS6-1#TRMPBF
VarumärkeAnalog Devices
24,41 kr
Each (On a Reel of 500)
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Surface Mount Programmable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 24 ns @ 5 pF
RS-artikelnummer 528-416
Tillv. art.nrNE556N
VarumärkeTexas Instruments
4,012 kr
Each (In a Tube of 25)
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Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-artikelnummer 858-0894
Tillv. art.nrLTC6994IS6-1#TRMPBF
VarumärkeAnalog Devices
42,746 kr
Each (In a Pack of 5)
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Surface Mount Programmable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 24 ns@ 5 pF
RS-artikelnummer 620-0357
Tillv. art.nrTLC555ID
VarumärkeTexas Instruments
7,114 kr
Each (In a Pack of 10)
Enheter
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 346-7024
Tillv. art.nrTLC555IP
VarumärkeTexas Instruments
11,48 kr
Each
Enheter
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 921-5374
Tillv. art.nrICM7555IPAZ
5,273 kr
Each (In a Pack of 10)
Enheter
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-artikelnummer 528-410
Tillv. art.nrTLC555IDR
VarumärkeTexas Instruments
6,018 kr
Each (In a Pack of 25)
Enheter
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 121-8948
Tillv. art.nrTLC555ID
VarumärkeTexas Instruments
6,465 kr
Each (In a Tube of 75)
Enheter
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 178-5489
Tillv. art.nrTLC555MJG
VarumärkeTexas Instruments
56,611 kr
Each (In a Tube of 10)
Enheter
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS-artikelnummer 170-8173
Tillv. art.nrICM7555IPAZ
4,56 kr
Each (In a Tube of 50)
Enheter
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-artikelnummer 923-5573
Tillv. art.nrDS1682S+
VarumärkeMaxim Integrated
36,226 kr
Each (In a Tube of 100)
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Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-artikelnummer 823-4043
Tillv. art.nrNE555S-13
VarumärkeDiodesZetex
2,432 kr
Each (In a Pack of 50)
Enheter
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
RS-artikelnummer 162-6928
Tillv. art.nrCD4536BPWR
VarumärkeTexas Instruments
1,791 kr
Each (On a Reel of 2000)
Enheter
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 920-3431
Tillv. art.nrSA555P
VarumärkeTexas Instruments
3,431 kr
Each (In a Tube of 50)
Enheter
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
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