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 534-4002
Tillv. art.nrLMC555CN/NOPB
VarumärkeTexas Instruments
12,41 kr
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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)
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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
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Through Hole Standard CDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS-artikelnummer 526-953
Tillv. art.nrSA555D
VarumärkeTexas Instruments
3,092 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 -200mA -
RS-artikelnummer 121-8449
Tillv. art.nrTLC555CP
VarumärkeTexas Instruments
6,183 kr
Each (In a Tube of 50)
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Through Hole Standard PDIP 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 638-942
Tillv. art.nrTLC555CP
VarumärkeTexas Instruments
11,89 kr
Each
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Through Hole Standard PDIP 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 124-4531
Tillv. art.nrLM555CN/NOPB
VarumärkeTexas Instruments
9,058 kr
Each (In a Pack of 10)
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Through Hole Standard PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 200 (Sink)mA 200 (Source)mA -
RS-artikelnummer 346-7024
Tillv. art.nrTLC555IP
VarumärkeTexas Instruments
11,48 kr
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Through Hole Standard PDIP 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)
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Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS-artikelnummer 528-410
Tillv. art.nrTLC555IDR
VarumärkeTexas Instruments
6,018 kr
Each (In a Pack of 25)
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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)
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Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 866-0192
Tillv. art.nrLM555CN/NOPB
VarumärkeTexas Instruments
8,249 kr
Each (In a Tube of 40)
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Through Hole Adjustable and Monostable PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - - - 100ns
RS-artikelnummer 620-0357
Tillv. art.nrTLC555ID
VarumärkeTexas Instruments
7,114 kr
Each (In a Pack of 10)
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Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-artikelnummer 796-8316
Tillv. art.nrTLC555MJG
VarumärkeTexas Instruments
65,555 kr
Each (In a Pack of 2)
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Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
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 162-8608
Tillv. art.nrLMC555IM/NOPB
VarumärkeTexas Instruments
11,663 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 662-4003
Tillv. art.nrTLC556CDR
VarumärkeTexas Instruments
11,726 kr
Each (In a Pack of 5)
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Surface Mount Standard SOIC 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-artikelnummer 824-6982
Tillv. art.nrLMC555CTP/NOPB
VarumärkeTexas Instruments
4,694 kr
Each (In a Pack of 5)
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Surface Mount Reset DSBGA 1 8 3MHz 1.5 V 15 V -40 °C +85 °C - -10mA 50mA 100ns
RS-artikelnummer 145-5862
Tillv. art.nrTLC552CD
VarumärkeTexas Instruments
11,802 kr
Each (In a Tube of 50)
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Surface Mount Monolithic SOIC 2 14 2MHz 1 V 18 V 0 °C +70 °C - 100mA -10mA -
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 -