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. 190-5917
FabrikantnummerICM7240IPE+
FabrikantMaxim Integrated
8,08 €
Each (In a Pack of 2)
Aantal stuks
Through Hole Fixed, Programmable PDIP 1 16 - 2 V 16 V -20 °C +85 °C - - - -
RS-stocknr. 190-4879
FabrikantnummerDS1023S-200+
FabrikantMaxim Integrated
11,71 €
Each (In a Tube of 46)
Aantal stuks
Surface Mount Programmable SOIC 1 16 10MHz 4.75 V 5.25 V 0 °C +70 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-5908
FabrikantnummerDS1100LZ-20+
FabrikantMaxim Integrated
6,325 €
Each (In a Pack of 2)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-4884
FabrikantnummerICM7240IPE+
FabrikantMaxim Integrated
6,338 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Fixed, Programmable PDIP 1 16 - 2 V 16 V -20 °C +85 °C - - - -
RS-stocknr. 190-5914
FabrikantnummerDS1100LZ-50+
FabrikantMaxim Integrated
6,34 €
Each (In a Pack of 2)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-5911
FabrikantnummerDS1100LZ-200+
FabrikantMaxim Integrated
6,34 €
Each (In a Pack of 2)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-5904
FabrikantnummerDS1023S-200+
FabrikantMaxim Integrated
14,33 €
Each
Aantal stuks
Surface Mount Programmable SOIC 1 16 10MHz 4.75 V 5.25 V 0 °C +70 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-4882
FabrikantnummerDS1100LZ-200+
FabrikantMaxim Integrated
4,307 €
Each (In a Tube of 100)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 540-4520
FabrikantnummerICM7555ISA+
FabrikantMaxim Integrated
2,40 €
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 0.5MHz 2 V 18 V -20 °C +85 °C - 3.2mA -2mA -
RS-stocknr. 698-7127
FabrikantnummerDS1682S+
FabrikantMaxim Integrated
4,63 €
Each
Aantal stuks
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-stocknr. 189-8665
FabrikantnummerICM7555IPA+
FabrikantMaxim Integrated
3,432 €
Each (In a Pack of 5)
Aantal stuks
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
RS-stocknr. 190-5920
FabrikantnummerMAX7375AXR805+T
FabrikantMaxim Integrated
1,368 €
Each (In a Pack of 5)
Aantal stuks
Surface Mount - SC-70 - 3 9.99MHz 2.7 V 5.5 V -40 °C +125 °C - - - -
RS-stocknr. 190-5952
FabrikantnummerICM7556ISD+
FabrikantMaxim Integrated
4,224 €
Each (In a Pack of 5)
Aantal stuks
Surface Mount Astable, RC Monostable SOIC 1 14 - 2 V 18 V -20 °C +85 °C - - - -
RS-stocknr. 190-4881
FabrikantnummerDS1100LZ-20+
FabrikantMaxim Integrated
4,285 €
Each (In a Tube of 100)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 190-4888
FabrikantnummerMAX7375AXR805+T
FabrikantMaxim Integrated
0,749 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount - SC-70 - 3 9.99MHz 2.7 V 5.5 V -40 °C +125 °C - - - -
RS-stocknr. 191-4848
FabrikantnummerICM7556IPD+
FabrikantMaxim Integrated
5,386 €
Each (In a Pack of 5)
Aantal stuks
Through Hole Monolithic PDIP 2 14 - 2 V 16.5 V -20 °C +85 °C - 3.2mA 2mA -
RS-stocknr. 189-8615
FabrikantnummerDS1682S+
FabrikantMaxim Integrated
4,635 €
Each (In a Pack of 2)
Aantal stuks
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
RS-stocknr. 190-5939
FabrikantnummerICM7555ESA+
FabrikantMaxim Integrated
2,295 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Astable, RC Monostable SOIC 1 8 - 2 V 18 V -40 °C +85 °C - - - -
RS-stocknr. 190-4883
FabrikantnummerDS1100LZ-50+
FabrikantMaxim Integrated
4,307 €
Each (In a Tube of 100)
Aantal stuks
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
RS-stocknr. 191-4247
FabrikantnummerICM7556IPD+
FabrikantMaxim Integrated
4,152 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Monolithic PDIP 2 14 - 2 V 16.5 V -20 °C +85 °C - 3.2mA 2mA -