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. 534-3992
FabrikantnummerLMC555CM/NOPB
€ 2,21
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
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. 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. 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. 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. 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. 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 -
RS-stocknr. 788-334
FabrikantnummerTLC555CD
€ 2,21
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
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. 662-4006
FabrikantnummerTLC555CDR
€ 0,519
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 346-7024
FabrikantnummerTLC555IP
€ 2,21
Each
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 162-7024
FabrikantnummerSA556N
€ 0,406
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 - 4.5 V 16 V -40 °C +85 °C 30mA 200mA -200mA -
RS-stocknr. 662-3999
FabrikantnummerNE555PWR
€ 0,259
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-stocknr. 162-7010
FabrikantnummerNE555PWR
€ 0,097
Each (On a Reel of 2000)
Aantal stuks
Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 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. 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. 620-0357
FabrikantnummerTLC555ID
€ 0,688
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 121-8948
FabrikantnummerTLC555ID
€ 0,625
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
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. 662-4696
FabrikantnummerTLC556IN
€ 1,402
Each (In a Pack of 5)
Aantal stuks
Through Hole Standard PDIP 2 14 2MHz 3 V 18 V -40 °C +85 °C - 100mA -10mA -