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.

...
Read more Read less

Filters

Viewing 1 - 20 of 158 products
Results per page
Description Price 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 Stock No. 638-942
Mfr. Part No.TLC555CP
€2.21
Each
units
Through Hole Standard PDIP 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS Stock No. 124-4531
Mfr. Part No.LM555CN/NOPB
€0.876
Each (In a Pack of 10)
units
Through Hole Standard PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 200 (Sink)mA 200 (Source)mA -
RS Stock No. 806-2835
Mfr. Part No.LM555CN
€0.474
Each (In a Tube of 50)
units
Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS Stock No. 169-8718
Mfr. Part No.LM555CN
€0.194
Each (On a Reel of 3000)
units
Through Hole Reset PDIP 1 8 - 4.5 V 16 V 0 °C +70 °C - 50mA 200mA -
RS Stock No. 534-4002
Mfr. Part No.LMC555CN/NOPB
€2.21
Each
units
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns@ 5 V
RS Stock No. 121-8804
Mfr. Part No.LMC555CN/NOPB
€0.948
Each (In a Tube of 40)
units
Through Hole Standard PDIP 1 8 3MHz - - -40 °C +85 °C - 50mA -10mA 100 ns @ 5 V
RS Stock No. 517-1618
Mfr. Part No.SA555P
€0.38
Each (In a Pack of 10)
units
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
RS Stock No. 920-3431
Mfr. Part No.SA555P
€0.345
Each (In a Tube of 50)
units
Through Hole Standard PDIP 1 8 - 4.5 V 16 V -40 °C +85 °C 15mA 200mA -200mA -
RS Stock No. 170-8173
Mfr. Part No.ICM7555IPAZ
€0.60
Each (In a Tube of 50)
units
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS Stock No. 921-5374
Mfr. Part No.ICM7555IPAZ
€0.66
Each (In a Pack of 10)
units
Through Hole Standard PDIP 1 8 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS Stock No. 709-1999
Mfr. Part No.CD4541BEE4
€0.426
Each (In a Pack of 10)
units
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
RS Stock No. 732-1317
Mfr. Part No.SE555JG
€6.26
Each
units
Through Hole Standard CDIP 1 8 - 4.5 V 18 V -55 °C +125 °C 12mA 200mA -200mA -
RS Stock No. 923-6712
Mfr. Part No.CD4541BEE4
€0.388
Each (In a Tube of 25)
units
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
RS Stock No. 165-8649
Mfr. Part No.SA555S-13
€0.111
Each (On a Reel of 2500)
units
Surface Mount Precision, Reset SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C - 200mA -200mA -
RS Stock No. 732-7664
Mfr. Part No.ICM7555IPA+
€2.76
Each
units
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
RS Stock No. 885-5564
Mfr. Part No.SA555S-13
€0.313
Each (In a Pack of 50)
units
Surface Mount Precision, Reset SOIC 1 8 - 4.5 V 16 V -40 °C +85 °C - 200mA -200mA -
RS Stock No. 103-9932
Mfr. Part No.ICM7555IPA+
€2.562
Each (In a Tube of 50)
units
Through Hole Standard PDIP 1 8 - 2 V 18 V -20 °C +85 °C - 3.2mA 2mA -
RS Stock No. 823-4043
Mfr. Part No.NE555S-13
€0.248
Each (In a Pack of 50)
units
Surface Mount Precision SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
RS Stock No. 122-3283
Mfr. Part No.NE555S-13
€0.086
Each (On a Reel of 2500)
units
Surface Mount Programmable SOIC 1 8 - 4.5 V 16 V 0 °C +70 °C - 200mA -200mA -
RS Stock No. 662-4674
Mfr. Part No.TLC551CD
€1.81
Each (In a Pack of 5)
units
Surface Mount Standard SOIC 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
Related Products
Texas Instruments range of Counters and Shift Registers ...
Description:
Texas Instruments range of Counters and Shift Registers from the 74LS Family of Low Power Schottky Logic ICs The 74LS Family use bipolar junction technology coupled with Schottky diode clamps to achieve operating speeds equal to the original 74TTL family ...
Standard logic ICs using CMOS technology to achieve ...
Description:
Standard logic ICs using CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of CMOS integrated circuits The 74HC4000 logic family is functionally and pin-compatible with the standard LS logic family, and all devices have ...
Texas Instruments range of Complex Function products from ...
Description:
Texas Instruments range of Complex Function products from the 74HC High Speed CMOS Logic Family includes Binary Adders, Magnitude & Identity Comparators, Parity Checkers, 7-segment LCD Latch/Decoder/Drivers and PLL (Phase Locked Loop) ICs The 74HC Family use silicon gate CMOS ...
Texas Instruments Complex Function ICs from the 4000 ...
Description:
Texas Instruments Complex Function ICs from the 4000 Series CMOS Logic Family includes 7-segment LCD Latch/Decoder/Drivers, Magnitude Comparators and Phase Locked Loop (PLL) ICs CMOS Family devices Wide operating voltage range: 3 to 18V.