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 168-4872
Référence fabricantTLC556CD
1,186 €
Each (In a Tube of 50)
Unité
Surface Mount Standard SOIC 2 14 2MHz 2 V 18 V 0 °C +70 °C - 100mA -10mA -
N° de stock RS 197-7394
Référence fabricantNE556DR
0,139 €
Each (On a Reel of 2500)
Unité
- - SOIC 1 14 - - - - - - - - -
N° de stock RS 921-5541
Référence fabricantIS82C54Z
19,27 €
Each
Unité
Surface Mount Programmable PLCC 1 28 8MHz 4.5 V 5.5 V -40 °C +85 °C - 2.5mA -2.5mA 150 ns @ 5 V
N° de stock RS 185-1005
Référence fabricantBD9555FVM-CGTR
MarqueROHM
1,176 €
Each (In a Pack of 10)
Unité
Surface Mount Control MSOP 1 8 - 4.5 V 42 V -40 °C +125 °C - 50mA -10mA -
N° de stock RS 145-0016
Référence fabricantCD4536BEE4
0,23 €
Each (In a Tube of 25)
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 196-2111
Référence fabricantTS555IDTTR
0,412 €
Each (On a Reel of 2500)
Unité
Surface Mount Monostable SO 2 8 2.7MHz 2 V 16 V -40 °C +125 °C - 1mA -0.3mA -
N° de stock RS 165-8349
Référence fabricantNA555S-13
MarqueDiodesZetex
0,126 €
Each (On a Reel of 2500)
Unité
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V -40 °C +105 °C - 200mA -200mA -
N° de stock RS 829-1516
Référence fabricantSTWD100YNPWY3F
0,824 €
Each (In a Pack of 10)
Unité
Surface Mount Watchdog SOT-23 1 5 - 2.7 V 5.5 V -40 °C +125 °C - - - -
N° de stock RS 921-5507
Référence fabricantICM7555IBAZ
0,683 €
Each (In a Pack of 25)
Unité
Surface Mount Standard SOIC 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
N° de stock RS 190-4885
Référence fabricantICM7242IPA+
3,796 €
Each (In a Tube of 50)
Unité
Through Hole Fixed, Programmable PDIP 1 8 - 2 V 16 V 0 °C +85 °C - - - -
N° de stock RS 189-8615
Référence fabricantDS1682S+
4,635 €
Each (In a Pack of 2)
Unité
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
N° de stock RS 121-8520
Référence fabricantTLC555IP
0,719 €
Each (In a Tube of 50)
Unité
- - - - - - - - - - - - - -
N° de stock RS 162-6928
Référence fabricantCD4536BPWR
0,137 €
Each (On a Reel of 2000)
Unité
Surface Mount Programmable TSSOP 1 16 - 3 V 18 V -55 °C +125 °C 0.1mA 4.2mA -4.2mA 8000 ns @ 5 V
N° de stock RS 923-1470
Référence fabricantIS82C54-10Z
16,066 €
Each (In a Tube of 37)
Unité
Surface Mount Programmable PLCC 1 28 10MHz 4.5 V 5.5 V -40 °C +85 °C - 2.5mA -2.5mA 100 ns @ 5 V
N° de stock RS 197-7496
Référence fabricantSE555JG
10,68 €
Each
Unité
- - CDIP 1 8 - - - - - - - - -
N° de stock RS 698-7127
Référence fabricantDS1682S+
4,63 €
Each
Unité
Surface Mount Programmable SOIC - 8 0.1MHz 2.5 V 5.5 V -40 °C +85 °C - - - -
N° de stock RS 190-4888
Référence fabricantMAX7375AXR805+T
0,749 €
Each (On a Reel of 2500)
Unité
Surface Mount - SC-70 - 3 9.99MHz 2.7 V 5.5 V -40 °C +125 °C - - - -
N° de stock RS 662-4699
Référence fabricantTLC556MD
1,99 €
Each (In a Pack of 5)
Unité
Surface Mount Standard SOIC 2 14 2MHz 5 V 18 V -55 °C +125 °C - 100mA -10mA -
N° de stock RS 191-4848
Référence fabricantICM7556IPD+
5,386 €
Each (In a Pack of 5)
Unité
Through Hole Monolithic PDIP 2 14 - 2 V 16.5 V -20 °C +85 °C - 3.2mA 2mA -
N° de stock RS 196-8887
Référence fabricantICM7555CBAZ-T
0,243 €
Each (On a Reel of 2500)
Unité
- Standard SOIC 1 8 1MHz - - - - - - - -