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. 923-1470
FabrikantnummerIS82C54-10Z
€ 18,833
Each (In a Tube of 37)
Aantal stuks
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
RS-stocknr. 787-8706
FabrikantnummerMC1455DR2G
FabrikantON Semiconductor
€ 0,209
Each (In a Pack of 20)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 346-7024
FabrikantnummerTLC555IP
€ 2,33
Each
Aantal stuks
Through Hole Standard PDIP 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 103-9932
FabrikantnummerICM7555IPA+
FabrikantMaxim Integrated
€ 2,562
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 -
RS-stocknr. 146-1009
FabrikantnummerICM7555ISA+
FabrikantMaxim Integrated
€ 1,777
Each (In a Tube of 100)
Aantal stuks
Surface Mount Standard SOIC 1 8 0.5MHz 2 V 18 V -20 °C +85 °C - 3.2mA -2mA -
RS-stocknr. 121-8948
FabrikantnummerTLC555ID
€ 0,625
Each (In a Tube of 75)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 162-7010
FabrikantnummerNE555PWR
€ 0,097
Each (On a Reel of 2000)
Aantal stuks
Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
RS-stocknr. 823-4043
FabrikantnummerNE555S-13
FabrikantDiodesZetex
€ 0,248
Each (In a Pack of 50)
Aantal stuks
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
RS-stocknr. 162-9390
FabrikantnummerMC1455DR2G
FabrikantON Semiconductor
€ 0,148
Each (On a Reel of 2500)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 910-1705
FabrikantnummerMIC1557YM5-TR
FabrikantMicrochip
€ 0,709
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. 540-4520
FabrikantnummerICM7555ISA+
FabrikantMaxim Integrated
€ 2,37
Each
Aantal stuks
Surface Mount Standard SOIC 1 8 0.5MHz 2 V 18 V -20 °C +85 °C - 3.2mA -2mA -
RS-stocknr. 732-7664
FabrikantnummerICM7555IPA+
FabrikantMaxim Integrated
€ 2,76
Each
Aantal stuks
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
RS-stocknr. 787-8702
FabrikantnummerMC1455DG
FabrikantON Semiconductor
€ 0,366
Each (In a Pack of 14)
Aantal stuks
Surface Mount Standard SOIC 1 8 - 4.5 V 16 V 0 °C +75 °C 15mA - 200mA -
RS-stocknr. 528-410
FabrikantnummerTLC555IDR
€ 0,582
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. 485-8904
FabrikantnummerHEF4541BT,512
FabrikantNexperia
€ 0,568
Each (In a Pack of 10)
Aantal stuks
Surface Mount Programmable SOIC 1 14 36MHz 3 V 15 V -40 °C +85 °C - 4.2mA -4.2mA 1150 ns@ 5 V
RS-stocknr. 162-7024
FabrikantnummerSA556N
€ 0,406
Each (In a Tube of 25)
Aantal stuks
Through Hole Standard PDIP 2 14 - 4.5 V 16 V -40 °C +85 °C 30mA 200mA -200mA -
RS-stocknr. 178-7003
FabrikantnummerHEF4541BT,512
FabrikantNexperia
€ 0,512
Each (In a Tube of 57)
Aantal stuks
Surface Mount Programmable SOIC 1 14 36MHz 3 V 15 V -40 °C +85 °C - 4.2mA -4.2mA 1150 ns @ 5 V
RS-stocknr. 165-4288
FabrikantnummerMIC1557YM5-TR
FabrikantMicrochip
€ 0,538
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. 620-0357
FabrikantnummerTLC555ID
€ 0,688
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard SOIC 1 8 2MHz 3 V 15 V -40 °C +85 °C - 100mA -10mA -
RS-stocknr. 662-3999
FabrikantnummerNE555PWR
€ 0,253
Each (In a Pack of 10)
Aantal stuks
Surface Mount Standard TSSOP 1 8 - 4.5 V 16 V 0 °C +70 °C 15mA 200mA -200mA -
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