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 21 - 40 of 162 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. 921-5374
Mfr. Part No.ICM7555IPAZ
$1.302
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. 146-2399
Mfr. Part No.ICM7556IPDZ
$2.11
Each (In a Tube of 25)
units
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS Stock No. 921-5377
Mfr. Part No.ICM7556IPDZ
$2.432
Each (In a Pack of 5)
units
Through Hole Standard PDIP 2 14 1MHz 2 V 18 V -25 °C +85 °C - 20mA -0.8mA -
RS Stock No. 170-8173
Mfr. Part No.ICM7555IPAZ
$1.096
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. 662-4696
Mfr. Part No.TLC556IN
$2.74
Each (In a Pack of 5)
units
Through Hole Standard PDIP 2 14 2MHz 3 V 18 V -40 °C +85 °C - 100mA -10mA -
RS Stock No. 922-2158
Mfr. Part No.LMC555CMM/NOPB
$1.27
Each (On a Reel of 1000)
units
Surface Mount Programmable MSOP 1 8 3MHz - 15 V -40 °C +85 °C 0.4mA -10mA 50mA -
RS Stock No. 761-6104
Mfr. Part No.LMC555CMM/NOPB
$2.58
Each (In a Pack of 5)
units
Surface Mount Programmable MSOP 1 8 3MHz - 15 V -40 °C +85 °C 0.4mA -10mA 50mA -
RS Stock No. 121-9209
Mfr. Part No.TLC556IN
$1.90
Each (In a Tube of 25)
units
Through Hole Standard PDIP 2 14 2MHz 3 V 18 V -40 °C +85 °C - 100mA -10mA -
RS Stock No. 823-4043
Mfr. Part No.NE555S-13
$0.475
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. 528-416
Mfr. Part No.NE556N
$0.588
Each (In a Tube of 25)
units
Through Hole Standard PDIP 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
RS Stock No. 122-3283
Mfr. Part No.NE555S-13
$0.134
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. 168-4873
Mfr. Part No.TLC555CD
$1.02
Each (In a Tube of 75)
units
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS Stock No. 922-2690
Mfr. Part No.TLC555CDR
$0.477
Each (On a Reel of 2500)
units
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS Stock No. 662-4006
Mfr. Part No.TLC555CDR
$0.965
Each (In a Pack of 10)
units
Surface Mount Standard SOIC 1 8 2MHz 2 V 15 V 0 °C +70 °C - 100mA -10mA -
RS Stock No. 732-1313
Mfr. Part No.SE556J
$28.22
Each
units
Through Hole Standard CDIP 2 14 - 4.5 V 18 V -55 °C +125 °C 24mA 200mA -200mA -
RS Stock No. 178-5476
Mfr. Part No.SE556J
$22.968
Each (In a Tube of 10)
units
Through Hole Standard CDIP 2 14 - 4.5 V 18 V -55 °C +125 °C 24mA 200mA -200mA -
RS Stock No. 178-5489
Mfr. Part No.TLC555MJG
$17.39
Each (In a Tube of 10)
units
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS Stock No. 662-4677
Mfr. Part No.TLC551CP
$3.25
Each (In a Pack of 5)
units
Through Hole Standard PDIP 1 8 2MHz 1 V 15 V 0 °C +70 °C - 100mA -10mA -
RS Stock No. 796-8316
Mfr. Part No.TLC555MJG
$24.20
Each (In a Pack of 2)
units
Through Hole Standard CDIP 1 8 2.1MHz 2 V 15 V -55 °C +125 °C 350µA -10mA 100mA -
RS Stock No. 112-5368
Mfr. Part No.NE556D
$0.77
Each
units
Surface Mount Standard SOIC 2 14 - 4.5 V 16 V 0 °C +70 °C 30mA 200mA -200mA -
Related Products
The FAN7527B provides simple and high-performance active Power ...
Description:
The FAN7527B provides simple and high-performance active Power Factor Correction (PFC) The FAN7527B is optimized for electronic ballasts and low–power, high-density power supplies that require minimum board size, reduced external components, and low power dissipation. Because the R/C filter is ...
AB18X5 The ABRACON AB18X5 Real-Time Clock family provides ...
Description:
AB18X5 The ABRACON AB18X5 Real-Time Clock family provides agroundbreaking combination of ultra-low power coupled with a highly sophisticated feature setThe AB08X5 includes on-chiposcillators to provide minimum power consumption, full RTCfunctions including battery backup and programmable countersand alarms for ...
Timer, Linear Technology Linear Technology has a selection ...
Description:
Timer, Linear Technology Linear Technology has a selection of silicon oscillators and solid state timing devices The Timer Blox timing devices are designed for six operations Voltage-Controlled Oscillation (VCO), Low Frequency Clocking, Pulse-Width Modulation (PWM), One-Shot Generation and Signal Delay ...
MIC1555 / MIC1557 Timer, Microchip Microchip offers the ...
Description:
MIC1555 / MIC1557 Timer, Microchip Microchip offers the RC Timers / Oscillators with similar in function to the industry standard 555 timer A highly stable controller capable of producing accurate timing pulses. With monostable operation, you control the time delay ...