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
Nouveau
N° de stock RS 218-4553
Référence fabricantSA555D
0,399 €
Each (In a Tube of 75)
Unité
Surface Mount - SOIC 1 8 - - - - - - - - -
N° de stock RS 709-2532
Référence fabricantCD4536BEE4
0,28 €
Each (In a Pack of 10)
Unité
Through Hole Programmable PDIP 1 16 - 3 V 18 V -55 °C +125 °C 0.1mA 4.2mA -4.2mA 8000 ns@ 5 V
N° de stock RS 709-1999
Référence fabricantCD4541BE
0,463 €
Each (In a Pack of 10)
Unité
Through Hole Programmable PDIP 1 14 0.1MHz 3 V 18 V -55 °C +125 °C 0.1mA 12.6mA -12.6mA 18000 ns@ 5 V
Nouveau
N° de stock RS 217-7924
Référence fabricant8535AGI-31LF
6,761 €
Each (In a Tube of 74)
Unité
Surface Mount - TSSOP - 20 40MHz - - - - - - - -
N° de stock RS 188-9229
Référence fabricantTS556IDTTR
0,503 €
Each (On a Reel of 2500)
Unité
Surface Mount - SO 2 14 2.7MHz 2 V 16 V -40 °C +125 °C - 8mA -2mA 100 ns @ 10 pF
N° de stock RS 145-7365
Référence fabricantTLC556MD
1,50 €
Each (In a Tube of 50)
Unité
Surface Mount Standard SOIC 2 14 2MHz 5 V 18 V -55 °C +125 °C - 100mA -10mA -
N° de stock RS 189-7189
Référence fabricantICM7555IPA+
2,653 €
Each (In a Tube of 50)
Unité
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
N° de stock RS 190-5917
Référence fabricantICM7240IPE+
8,08 €
Each (In a Pack of 2)
Unité
Through Hole Fixed, Programmable PDIP 1 16 - 2 V 16 V -20 °C +85 °C - - - -
N° de stock RS 921-5951
Référence fabricantICM7242IPAZ
5,325 €
Each (In a Pack of 2)
Unité
Through Hole Standard PDIP 1 8 13MHz 2 V 16 V -25 °C +85 °C 0.125mA 50mA - -
N° de stock RS 190-5939
Référence fabricantICM7555ESA+
2,295 €
Each (In a Pack of 10)
Unité
Surface Mount Astable, RC Monostable SOIC 1 8 - 2 V 18 V -40 °C +85 °C - - - -
Nouveau
N° de stock RS 217-7925
Référence fabricant8535AGI-31LF
8,55 €
Each
Unité
Surface Mount - TSSOP - 20 40MHz - - - - - - - -
N° de stock RS 165-8649
Référence fabricantSA555S-13
MarqueDiodesZetex
0,122 €
Each (On a Reel of 2500)
Unité
Surface Mount Precision, Reset SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C - 200mA -200mA -
N° de stock RS 910-1705
Référence fabricantMIC1557YM5-TR
MarqueMicrochip
0,835 €
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 190-5904
Référence fabricantDS1023S-200+
14,33 €
Each
Unité
Surface Mount Programmable SOIC 1 16 10MHz 4.75 V 5.25 V 0 °C +70 °C - 8 (Minimum)mA -1mA -
N° de stock RS 170-8188
Référence fabricantICM7555IBAZ
MarqueIntersil
0,65 €
Each (In a Tube of 98)
Unité
Surface Mount Standard SOIC 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
N° de stock RS 825-5340
Référence fabricantTPL5000DGST
0,638 €
Each (In a Pack of 5)
Unité
Surface Mount Programmable VSSOP 1 10 - 1.8 V 5 V -40 °C +105 °C - - - -
N° de stock RS 662-4012
Référence fabricantTLC556IDR
1,33 €
Each (In a Pack of 5)
Unité
Surface Mount Standard SOIC 2 14 2MHz 3 V 18 V -40 °C +85 °C - 100mA -10mA -
N° de stock RS 145-1217
Référence fabricantTLC551CD
1,669 €
Each (In a Tube of 75)
Unité
Surface Mount Standard SOIC 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 197-7335
Référence fabricantLMC555CM/NOPB
1,143 €
Each (In a Pack of 10)
Unité
- - SOIC 1 8 3MHz - - - - - - - -
N° de stock RS 346-7024
Référence fabricantTLC555IP
0,87 €
Each
Unité
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -