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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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 121-8948
Référence fabricantTLC555ID
0,59 €
Each (In a Tube of 75)
Unité
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
N° de stock RS 170-8196
Référence fabricantCS82C54-10Z
MarqueIntersil
9,548 €
Each (In a Tube of 37)
Unité
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
N° de stock RS 528-410
Référence fabricantTLC555IDR
0,573 €
Each (In a Pack of 25)
Unité
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
N° de stock RS 921-5377
Référence fabricantICM7556IPDZ
1,498 €
Each (In a Pack of 5)
Unité
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
N° de stock RS 920-3431
Référence fabricantSA555P
0,311 €
Each (In a Tube of 50)
Unité
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
N° de stock RS 517-1618
Référence fabricantSA555P
0,311 €
Each (In a Pack of 10)
Unité
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
N° de stock RS 145-0415
Référence fabricantTLC551CP
1,619 €
Each (In a Tube of 50)
Unité
Through Hole Standard PDIP 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 923-1477
Référence fabricantCS82C54-10Z96
7,356 €
Each (On a Reel of 750)
Unité
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
N° de stock RS 170-8173
Référence fabricantICM7555IPAZ
0,63 €
Each (In a Tube of 50)
Unité
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
N° de stock RS 528-416
Référence fabricantNE556N
0,362 €
Each (In a Tube of 25)
Unité
Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
N° de stock RS 662-4006
Référence fabricantTLC555CDR
0,537 €
Each (In a Pack of 10)
Unité
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 921-5652
Référence fabricantCS82C54-10Z96
10,66 €
Each
Unité
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V 0 °C +70 °C - 2.5mA -2.5mA 100 ns @ 5 V
N° de stock RS 922-2690
Référence fabricantTLC555CDR
0,254 €
Each (On a Reel of 2500)
Unité
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 788-334
Référence fabricantTLC555CD
0,73 €
Each
Unité
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 910-1733
Référence fabricantMIC1555YM5-TR
MarqueMicrochip
0,665 €
Each (In a Pack of 10)
Unité
Surface Mount Precision, Standard SOT-23 1 5 5MHz 2.7 V 18 V -40 °C +85 °C - 20mA -20mA -
N° de stock RS 165-4290
Référence fabricantMIC1555YM5-TR
MarqueMicrochip
0,505 €
Each (On a Reel of 3000)
Unité
Surface Mount Precision, Standard SOT-23 1 5 5MHz 2.7 V 18 V -40 °C +85 °C - 20mA -20mA -
N° de stock RS 168-4873
Référence fabricantTLC555CD
0,602 €
Each (In a Tube of 75)
Unité
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 162-7024
Référence fabricantSA556N
0,377 €
Each (In a Tube of 25)
Unité
Through Hole Standard PDIP 2 14 - 4.5 V 16 V -40 °C +85 °C 30mA 200mA -200mA -
N° de stock RS 620-0357
Référence fabricantTLC555ID
0,591 €
Each (In a Pack of 10)
Unité
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
N° de stock RS 346-7024
Référence fabricantTLC555IP
0,79 €
Each
Unité
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -