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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Description Prix 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
N° de stock RS 190-5911
Référence fabricantDS1100LZ-200+
6,34 €
Each (In a Pack of 2)
Unité
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
N° de stock RS 122-3283
Référence fabricantNE555S-13
MarqueDiodesZetex
0,091 €
Each (On a Reel of 2500)
Unité
Surface Mount Programmable SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
N° de stock RS 196-8888
Référence fabricantICM7555CBAZ-T
0,561 €
Each (In a Pack of 25)
Unité
- Standard SOIC 1 8 1MHz - - - - - - - -
N° de stock RS 921-0745
Référence fabricantNA555S-13
MarqueDiodesZetex
0,35 €
Each (In a Pack of 30)
Unité
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V -40 °C +105 °C - 200mA -200mA -
N° de stock RS 197-7393
Référence fabricantNE555DR
0,235 €
Each (In a Pack of 50)
Unité
- - SOIC 1 8 - - - - - - - - -
N° de stock RS 662-4003
Référence fabricantTLC556CDR
1,208 €
Each (In a Pack of 5)
Unité
Surface Mount Standard SOIC 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 162-7093
Référence fabricantTLC555QDR
0,304 €
Each (On a Reel of 2500)
Unité
Surface Mount Standard SOIC 1 8 2MHz 5 V 15 V -40 °C +125 °C - 100mA -10mA -
N° de stock RS 162-7010
Référence fabricantNE555PWR
0,071 €
Each (On a Reel of 2000)
Unité
Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
N° de stock RS 197-7392
Référence fabricantNE555DR
0,072 €
Each (On a Reel of 2500)
Unité
- - SOIC 1 8 - - - - - - - - -
N° de stock RS 156-5697
Référence fabricantLTC6993CS6-4#TRMPBF
1,795 €
Each (On a Reel of 500)
Unité
Surface Mount Monostable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 28 ns @ 5 pF
N° de stock RS 178-5476
Référence fabricantSE556J
13,095 €
Each (In a Tube of 10)
Unité
Through Hole Standard CDIP 2 14 - 4.5 V 18 V -55 °C +125 °C 24mA 200mA -200mA -
N° de stock RS 823-4043
Référence fabricantNE555S-13
MarqueDiodesZetex
0,255 €
Each (In a Pack of 50)
Unité
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
N° de stock RS 190-4883
Référence fabricantDS1100LZ-50+
4,307 €
Each (In a Tube of 100)
Unité
Surface Mount Precision SOIC 1 8 1MHz 3 V 3.6 V -40 °C +85 °C - 8 (Minimum)mA -1mA -
N° de stock RS 145-0940
Référence fabricantCD4541BPW
0,119 €
Each (In a Tube of 90)
Unité
Surface Mount Programmable TSSOP 1 14 6MHz 3 V 18 V -55 °C +125 °C 100µA 12.6mA -12.6mA 18 μs @ 50 pF
N° de stock RS 858-0891
Référence fabricantLTC6993CS6-4#TRMPBF
3,012 €
Each (In a Pack of 5)
Unité
Surface Mount Monostable TSOT-23 1 6 - 2.25 V 5.5 V -40 °C +85 °C - 16mA -16mA 28 ns@ 5 pF
N° de stock RS 190-5926
Référence fabricantICM7242IPA+
4,922 €
Each (In a Pack of 5)
Unité
Through Hole Fixed, Programmable PDIP 1 8 - 2 V 16 V 0 °C +85 °C - - - -
N° de stock RS 197-7308
Référence fabricantLM555CN/NOPB
0,996 €
Each (In a Pack of 10)
Unité
- - PDIP 1 8 - - - - - - - - -
N° de stock RS 923-1571
Référence fabricantICM7242IPAZ
4,521 €
Each (In a Tube of 50)
Unité
Through Hole Standard PDIP 1 8 13MHz 2 V 16 V -25 °C +85 °C 0.125mA 50mA - -
N° de stock RS 787-8702
Référence fabricantMC1455DG
0,343 €
Each (In a Pack of 14)
Unité
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
Nouveau
N° de stock RS 218-4551
Référence fabricantSA555DR
0,101 €
Each (On a Reel of 2500)
Unité
Surface Mount - SOIC 1 8 - - - - - - - - -