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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Omschrijving Prijs 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-stocknr. 866-0192
FabrikantnummerLM555CN/NOPB
0,798 €
Each (In a Tube of 40)
Aantal stuks
Through Hole Adjustable and Monostable PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - - - 100ns
RS-stocknr. 124-4531
FabrikantnummerLM555CN/NOPB
0,876 €
Each (In a Pack of 10)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 200 (Sink)mA 200 (Source)mA -
RS-stocknr. 121-9248
FabrikantnummerSE555P
0,313 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS-stocknr. 145-0833
FabrikantnummerNE556D
0,399 €
Each (In a Tube of 50)
Aantal stuks
Surface Mount Standard SOIC 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 112-5368
FabrikantnummerNE556D
2,21 €
Each
Aantal stuks
Surface Mount Standard SOIC 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 662-3993
FabrikantnummerNE556DR
0,334 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 178-5489
FabrikantnummerTLC555MJG
5,705 €
Each (In a Tube of 10)
Aantal stuks
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS-stocknr. 638-958
FabrikantnummerTLC556CN
2,21 €
Each
Aantal stuks
Through Hole Standard PDIP 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 796-8316
FabrikantnummerTLC555MJG
3,695 €
Each (In a Pack of 2)
Aantal stuks
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS-stocknr. 162-7011
FabrikantnummerNE556DR
0,13 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 145-0078
FabrikantnummerTLC556CN
1,11 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 534-4002
FabrikantnummerLMC555CN/NOPB
2,21 €
Each
Aantal stuks
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
RS-stocknr. 121-8804
FabrikantnummerLMC555CN/NOPB
0,948 €
Each (In a Tube of 40)
Aantal stuks
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns @ 5 V
RS-stocknr. 732-1317
FabrikantnummerSE555JG
6,09 €
Each
Aantal stuks
Through Hole Standard CDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS-stocknr. 528-410
FabrikantnummerTLC555IDR
0,582 €
Each (In a Pack of 25)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 517-1618
FabrikantnummerSA555P
0,38 €
Each (In a Pack of 10)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
RS-stocknr. 168-4873
FabrikantnummerTLC555CD
0,636 €
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 528-416
FabrikantnummerNE556N
0,388 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 638-942
FabrikantnummerTLC555CP
2,21 €
Each
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 922-2690
FabrikantnummerTLC555CDR
0,248 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -