Timer Circuits

Timer circuits are used to control one or more sequences of events within an electronic system. Timer circuits work by changing the circuit from its current state to another in advance following a set parameter.

Where would I use a timer circuit?

You can use timer circuits for a wide range of basic timing functions, like turning a light on for a certain amount of time or on and off repeatedly within a set time to create a flashing light or lighting sequence. Timer circuits 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. 221-5535
FabrikantnummerNE555P
€ 0,26
Each (In a Pack of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-stocknr. 866-0199
FabrikantnummerNE555P
€ 0,253
Each (In a Tube of 50)
Aantal stuks
Through Hole Adjustable and Monostable PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA 300 ns @ 15 pF
RS-stocknr. 121-8461
FabrikantnummerNE555D
€ 0,31
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-stocknr. 785-818
FabrikantnummerNE555D
€ 0,43
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-stocknr. 528-416
FabrikantnummerNE556N
€ 0,438
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. 662-4006
FabrikantnummerTLC555CDR
€ 0,619
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. 922-2158
FabrikantnummerLMC555CMM/NOPB
€ 0,846
Each (On a Reel of 1000)
Aantal stuks
Surface Mount Programmable MSOP 1 8 3MHz - 15 V -40 °C +85 °C 0.4mA -10mA 50mA -
RS-stocknr. 788-334
FabrikantnummerTLC555CD
€ 0,77
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
€ 0,662
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. 761-6104
FabrikantnummerLMC555CMM/NOPB
€ 1,072
Each (In a Pack of 5)
Aantal stuks
Surface Mount Programmable MSOP 1 8 3MHz - 15 V -40 °C +85 °C 0.4mA -10mA 50mA -
RS-stocknr. 922-2690
FabrikantnummerTLC555CDR
€ 0,288
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. 662-3999
FabrikantnummerNE555PWR
€ 0,277
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
€ 0,071
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. 620-0357
FabrikantnummerTLC555ID
€ 0,663
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
€ 0,663
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. 121-8520
FabrikantnummerTLC555IP
€ 0,719
Each (In a Tube of 50)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 346-7024
FabrikantnummerTLC555IP
€ 0,87
Each
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 528-410
FabrikantnummerTLC555IDR
€ 0,63
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. 662-4009
FabrikantnummerTLC555QDR
€ 0,687
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 5 V 15 V -40 °C +125 °C - 100mA -10mA -
RS-stocknr. 460-516
FabrikantnummerLM555CM/NOPB
€ 1,054
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -