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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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. 517-1618
FabrikantnummerSA555P
0,311 €
Each (In a Pack of 10)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
RS-stocknr. 168-4873
FabrikantnummerTLC555CD
0,602 €
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 921-5652
FabrikantnummerCS82C54-10Z96
10,66 €
Each
Aantal stuks
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
RS-stocknr. 920-3431
FabrikantnummerSA555P
0,311 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
RS-stocknr. 662-4677
FabrikantnummerTLC551CP
1,902 €
Each (In a Pack of 5)
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 923-1477
FabrikantnummerCS82C54-10Z96
7,356 €
Each (On a Reel of 750)
Aantal stuks
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
RS-stocknr. 910-1733
FabrikantnummerMIC1555YM5-TR
FabrikantMicrochip
0,668 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Precision, Standard SOT-23 1 5 5MHz 2.7 V 18 V -40 °C +85 °C - 20mA -20mA -
RS-stocknr. 165-4290
FabrikantnummerMIC1555YM5-TR
FabrikantMicrochip
0,507 €
Each (On a Reel of 3000)
Aantal stuks
Surface Mount Precision, Standard SOT-23 1 5 5MHz 2.7 V 18 V -40 °C +85 °C - 20mA -20mA -
RS-stocknr. 922-2690
FabrikantnummerTLC555CDR
0,254 €
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 788-334
FabrikantnummerTLC555CD
0,73 €
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 921-5582
FabrikantnummerCS82C54-10Z
10,83 €
Each
Aantal stuks
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
RS-stocknr. 146-2399
FabrikantnummerICM7556IPDZ
1,276 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 921-5377
FabrikantnummerICM7556IPDZ
1,498 €
Each (In a Pack of 5)
Aantal stuks
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 921-5374
FabrikantnummerICM7555IPAZ
0,72 €
Each (In a Pack of 10)
Aantal stuks
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 528-416
FabrikantnummerNE556N
0,362 €
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS-stocknr. 528-410
FabrikantnummerTLC555IDR
0,573 €
Each (In a Pack of 25)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 145-0415
FabrikantnummerTLC551CP
1,619 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 170-8173
FabrikantnummerICM7555IPAZ
0,63 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS-stocknr. 662-4006
FabrikantnummerTLC555CDR
0,537 €
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS-stocknr. 189-7189
FabrikantnummerICM7555IPA+
FabrikantMaxim Integrated
2,448 €
Each (In a Tube of 50)
Aantal stuks
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
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