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 o...

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Texas Instruments NE555P, Precision Timer, 8-Pin PDIP
Texas Instruments NE555P, Precision Timer, 8-Pin PDIP
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RS Stock No.: 221-5535Brand: Texas InstrumentsManufacturers Part No.: NE555P

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50

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Texas Instruments
Through Hole
Standard
PDIP
1
8
-
4.5 V
16 V
0 °C
+70 °C
15mA
200mA
-200mA
-
9.81 x 6.35 x 4.57mm
6.35mm
-
9.81mm
-
4.57mm
Texas Instruments NE555DR NE555DR, Timer Circuit, 8-Pin SOIC
Texas Instruments NE555DR NE555DR, Timer Circuit, 8-Pin SOIC
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RS Stock No.: 197-7392Brand: Texas InstrumentsManufacturers Part No.: NE555DR

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Texas Instruments
-
-
SOIC
1
8
-
-
-
-
-
-
-
-
-
-
-
NE555DR
-
-
-
Texas Instruments NE556DR NE556DR, Timer Circuit, 14-Pin SOIC
Texas Instruments NE556DR NE556DR, Timer Circuit, 14-Pin SOIC
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RS Stock No.: 197-7394Brand: Texas InstrumentsManufacturers Part No.: NE556DR

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Texas Instruments
-
-
SOIC
1
14
-
-
-
-
-
-
-
-
-
-
-
NE556DR
-
-
-
Texas Instruments xx555 SA555D, Timer, 8-Pin SOIC
Texas Instruments xx555 SA555D, Timer, 8-Pin SOIC
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RS Stock No.: 218-4553Brand: Texas InstrumentsManufacturers Part No.: SA555D

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Texas Instruments
Surface Mount
-
SOIC
1
8
-
-
-
-
-
-
-
-
-
-
-
xx555
-
-
-
STMicroelectronics TS556IDTTR, CMOS Timer, Dual 2.7MHz, 14-Pin SO
STMicroelectronics TS556IDTTR, CMOS Timer, Dual 2.7MHz, 14-Pin SO
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RS Stock No.: 188-9229Brand: STMicroelectronicsManufacturers Part No.: TS556IDTTR

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STMicroelectronics
Surface Mount
-
SO
2
14
2.7MHz
2 V
16 V
-40 °C
+125 °C
-
8mA
-2mA
100 ns @ 10 pF
8.75 x 4 x 1.65mm
4mm
-
8.75mm
10pF
1.65mm
DiodesZetex NE555S-13, Precision Timer Circuit, 8-Pin SOIC
DiodesZetex NE555S-13, Precision Timer Circuit, 8-Pin SOIC
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RS Stock No.: 823-4043Brand: DiodesZetexManufacturers Part No.: NE555S-13

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DiodesZetex
Surface Mount
Precision
SOIC
1
8
-
4.5 V
16 V
0 °C
+70 °C
-
200mA
-200mA
-
4.95 X 3.95 X 1.5mm
3.95mm
-
4.95mm
-
1.5mm
Texas Instruments NE556N, Timer Circuit, Dual, 14-Pin PDIP
Texas Instruments NE556N, Timer Circuit, Dual, 14-Pin PDIP
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RS Stock No.: 528-416Brand: Texas InstrumentsManufacturers Part No.: NE556N

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Texas Instruments
Through Hole
Standard
PDIP
2
14
-
4.5 V
16 V
0 °C
+70 °C
30mA
200mA
-200mA
-
19.3 x 6.35 x 4.57mm
6.35mm
-
19.3mm
-
4.57mm
Renesas Electronics ICM7555IPAZ, Programmable Timer Circuit 1MHz, 8-Pin PDIP
Renesas Electronics ICM7555IPAZ, Programmable Timer Circuit 1MHz, 8-Pin PDIP
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RS Stock No.: 921-5374Brand: Renesas ElectronicsManufacturers Part No.: ICM7555IPAZ

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Renesas Electronics
Through Hole
Standard
PDIP
1
8
1MHz
2 V
18 V
-25 °C
+85 °C
-
20mA
-0.8mA
-
10.16 x 7.11 x 4.95mm
7.11mm
-
10.16mm
-
4.95mm
Texas Instruments TLC555IP, Timer Circuit 2MHz, 8-Pin PDIP
Texas Instruments TLC555IP, Timer Circuit 2MHz, 8-Pin PDIP
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RS Stock No.: 346-7024Brand: Texas InstrumentsManufacturers Part No.: TLC555IP

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1

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Texas Instruments
Through Hole
Standard
PDIP
1
8
2MHz
3 V
15 V
-40 °C
+85 °C
-
100mA
-10mA
-
9.81 x 6.35 x 4.57mm
6.35mm
-
9.81mm
-
4.57mm
Texas Instruments NE555DR NE555DR, Timer Circuit, 8-Pin SOIC
Texas Instruments NE555DR NE555DR, Timer Circuit, 8-Pin SOIC
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Also available in industry standard packaging
RS Stock No.: 197-7393Brand: Texas InstrumentsManufacturers Part No.: NE555DR

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Texas Instruments
-
-
SOIC
1
8
-
-
-
-
-
-
-
-
-
-
-
NE555DR
-
-
-
Renesas Electronics ICM7242IPAZ, Timer Circuit 13MHz, 8-Pin PDIP
Renesas Electronics ICM7242IPAZ, Timer Circuit 13MHz, 8-Pin PDIP
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RS Stock No.: 921-5951Brand: Renesas ElectronicsManufacturers Part No.: ICM7242IPAZ

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Renesas Electronics
Through Hole
Standard
PDIP
1
8
13MHz
2 V
16 V
-25 °C
+85 °C
0.125mA
50mA
-
-
10.16 x 8.25 x 4.95mm
8.25mm
-
10.16mm
-
4.95mm
Texas Instruments NE555P, Monstable Circuit, 8-Pin PDIP
Texas Instruments NE555P, Monstable Circuit, 8-Pin PDIP
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RS Stock No.: 866-0199Brand: Texas InstrumentsManufacturers Part No.: NE555P

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Texas Instruments
Through Hole
Adjustable and Monostable
PDIP
1
8
-
4.5 V
16 V
0 °C
+70 °C
-
200mA
-200mA
300 ns @ 15 pF
10.16 x 6.6 x 4.57mm
6.6mm
-
10.16mm
15pF
4.57mm
Texas Instruments xx555 SA555D, Timer, 8-Pin SOIC
Texas Instruments xx555 SA555D, Timer, 8-Pin SOIC
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RS Stock No.: 218-4555Brand: Texas InstrumentsManufacturers Part No.: SA555D

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Texas Instruments
Surface Mount
-
SOIC
1
8
-
-
-
-
-
-
-
-
-
-
-
xx555
-
-
-
Texas Instruments SE555JG SE555JG, Timer Circuit, 8-Pin CDIP
Texas Instruments SE555JG SE555JG, Timer Circuit, 8-Pin CDIP
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RS Stock No.: 197-7495Brand: Texas InstrumentsManufacturers Part No.: SE555JG

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Texas Instruments
-
-
CDIP
1
8
-
-
-
-
-
-
-
-
-
-
-
SE555JG
-
-
-
Maxim Integrated ICM7242IPA+, Timer Circuit, 8-Pin PDIP
Maxim Integrated ICM7242IPA+, Timer Circuit, 8-Pin PDIP
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RS Stock No.: 190-4885Brand: Maxim IntegratedManufacturers Part No.: ICM7242IPA+

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Maxim Integrated
Through Hole
Fixed, Programmable
PDIP
1
8
-
2 V
16 V
0 °C
+85 °C
-
-
-
-
9.91 x 7.87 x 4.45mm
7.87mm
-
9.91mm
10pF
4.45mm
Texas Instruments TLC555CDR, Timer Circuit 2MHz, 8-Pin SOIC
Texas Instruments TLC555CDR, Timer Circuit 2MHz, 8-Pin SOIC
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Also available in industry standard packaging
RS Stock No.: 662-4006Brand: Texas InstrumentsManufacturers Part No.: TLC555CDR

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Texas Instruments
Surface Mount
Standard
SOIC
1
8
2MHz
2 V
15 V
0 °C
+70 °C
-
100mA
-10mA
-
4.9 x 3.91 x 1.58mm
3.91mm
-
4.9mm
-
1.58mm
Texas Instruments SA555P, Timer Circuit, 8-Pin PDIP
Texas Instruments SA555P, Timer Circuit, 8-Pin PDIP
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Also available in industry standard packaging
RS Stock No.: 517-1618Brand: Texas InstrumentsManufacturers Part No.: SA555P

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10

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Texas Instruments
Through Hole
Standard
PDIP
1
8
-
4.5 V
16 V
-40 °C
+85 °C
15mA
200mA
-200mA
-
9.81 x 6.35 x 4.57mm
6.35mm
-
9.81mm
-
4.57mm
Maxim Integrated ICM7556ISD+, Timer Circuit, 14-Pin SOIC
Maxim Integrated ICM7556ISD+, Timer Circuit, 14-Pin SOIC
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RS Stock No.: 190-4887Brand: Maxim IntegratedManufacturers Part No.: ICM7556ISD+

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50

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Maxim Integrated
Surface Mount
Astable, RC Monostable
SOIC
1
14
-
2 V
18 V
-20 °C
+85 °C
-
-
-
-
8.75 x 4 x 1.5mm
4mm
-
8.75mm
10pF
1.5mm
Texas Instruments TLC555 TLC555CP, Timer Circuit 2MHz, 8-Pin PDIP
Texas Instruments TLC555 TLC555CP, Timer Circuit 2MHz, 8-Pin PDIP
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RS Stock No.: 197-7573Brand: Texas InstrumentsManufacturers Part No.: TLC555CP

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50

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Texas Instruments
Surface Mount
-
PDIP
1
8
2MHz
-
-
-
-
-
-
-
-
-
-
TLC555
-
-
-
Renesas Electronics ICM7556IPDZ, Programmable Timer Circuit, Dual 1MHz, 14-Pin PDIP
Renesas Electronics ICM7556IPDZ, Programmable Timer Circuit, Dual 1MHz, 14-Pin PDIP
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Also available in industry standard packaging
RS Stock No.: 921-5377Brand: Renesas ElectronicsManufacturers Part No.: ICM7556IPDZ

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5

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Renesas Electronics
Through Hole
Standard
PDIP
2
14
1MHz
2 V
18 V
-25 °C
+85 °C
-
20mA
-0.8mA
-
19.68 x 7.11 x 4.95mm
7.11mm
-
19.68mm
-
4.95mm