Voltage Supervisors

Voltage supervisors are integrated circuits (ICs) that monitor or supervise a voltage within an electronic circuit. They are sometimes referred to as voltage monitors or detectors. Voltage supervisors are found in most electronic applications and are used to prevent system failure and ensure correct system power up.


Voltage supervisors have an output signal which is given if the voltage falls outside of the chose parameters. This signal can be used to enable, disable or reset another device. Supervisors are commonly paired with a microprocessor (MPU) or microcontroller (MCU) device, as they often require a specific voltage range. Voltage supervisors can also be used as a fault detector for a sensor.


Types of Voltage Supervisors:


  • CMOS voltage detector

  • Open drain voltage detector

  • Watchdog timer

  • Window detector

  • Back-up battery supervisor

  • Battery monitoring

Things to consider when choosing a voltage supervisor?


  • Reset voltage

  • Supply voltage

  • Number of channels

  • Package type

What are processor supervisors?


Processor Supervisors monitor voltage for microprocessors and microcontrollers (MCUs). It is essential that processor parameters are monitored by supervisors to ensure that these parameter boundaries are not exceeded. Exceeding some parameters can result in failure or even a dangerous result.


One of the primary things that a processor supervisor will monitor is voltage. For example, a supervisory circuit monitor may monitor voltages with a threshold of 1.6V to 5V. If the CPU’s circuit voltage falls outside of these limits, the supervisor would create an output signal, for example, a reset output.


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Omschrijving Prijs Voltage Supervisor Type Number of Supervisors Watchdog Timer Manual Reset Maximum Reset Threshold Voltage Power Fail Detection Minimum Reset Threshold Voltage Output Driver Maximum Reset Active Time Mounting Type Package Type Pin Count Dimensions Maximum Monitored Voltage
RS-stocknr. 662-4236
FabrikantnummerTPS3809L30DBVT
0,638 €
Each (In a Pack of 10)
Aantal stuks
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS-stocknr. 662-3390
FabrikantnummerTPS3813K33DBVT
1,576 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes - - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 162-7171
FabrikantnummerTPS3809L30DBVT
0,403 €
Each (On a Reel of 250)
Aantal stuks
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS-stocknr. 145-6389
FabrikantnummerTPS3813K33DBVT
1,314 €
Each (On a Reel of 250)
Aantal stuks
- 1 Yes - - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 526-779
FabrikantnummerTPS3823-33DBVR
0,628 €
Each (In a Pack of 5)
Aantal stuks
Supervisory Circuits with Watchdog 1 Yes Yes 3V - 2.86V - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 5.8V
RS-stocknr. 922-2713
FabrikantnummerTPS3805H33DCKR
0,424 €
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 2 - - 3.096V - 3.004V - - Surface Mount SC-70 5 2 x 1.25 x 0.9mm 6.3V
RS-stocknr. 121-9204
FabrikantnummerTPS3809K33DBVT
0,412 €
Each (On a Reel of 250)
Aantal stuks
Supply 1 - - 2.99V - 2.87V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS-stocknr. 761-6075
FabrikantnummerLM809M3-2.63/NOPB
0,564 €
Each (In a Pack of 10)
Aantal stuks
- 1 - - - - - Active High, Active Low 840ms Surface Mount SOT-23 3 3.048 x 1.194 x 0.94mm 2.7V
RS-stocknr. 121-8855
FabrikantnummerLM809M3-4.63/NOPB
0,254 €
Each (On a Reel of 1000)
Aantal stuks
- 1 - - - - - Active Low 840ms Surface Mount SOT-23 3 2.92 x 1.3 x 0.93mm 4.75V
RS-stocknr. 536-0060
FabrikantnummerLM809M3-4.63/NOPB
0,658 €
Each (In a Pack of 5)
Aantal stuks
- 1 - - - - - Active Low 840ms Surface Mount SOT-23 3 2.92 x 1.3 x 0.93mm 4.75V
RS-stocknr. 162-4891
FabrikantnummerTPS3828-50DBVT
1,164 €
Each (On a Reel of 250)
Aantal stuks
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS-stocknr. 517-1141
FabrikantnummerTPS3828-50DBVT
1,132 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS-stocknr. 662-4227
FabrikantnummerTPS3809K33DBVT
0,638 €
Each (In a Pack of 10)
Aantal stuks
Supply 1 - - 2.99V - 2.87V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS-stocknr. 162-6280
FabrikantnummerLM809M3-2.63/NOPB
0,248 €
Each (On a Reel of 1000)
Aantal stuks
- 1 - - - - - Active High, Active Low 840ms Surface Mount SOT-23 3 3.048 x 1.194 x 0.94mm 2.7V
RS-stocknr. 662-4205
FabrikantnummerTPS3805H33DCKR
0,984 €
Each (In a Pack of 5)
Aantal stuks
Voltage Detector 2 - - 3.096V - 3.004V - - Surface Mount SC-70 5 2 x 1.25 x 0.9mm 6.3V
RS-stocknr. 620-0723
FabrikantnummerTPS3823-33DBVT
0,975 €
Each (In a Pack of 10)
Aantal stuks
Supervisory Circuits with Watchdog 1 Yes Yes 3V - 2.86V - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 5.8V
RS-stocknr. 517-1185
FabrikantnummerTPS3838E18DBVT
2,154 €
Each (In a Pack of 5)
Aantal stuks
- 1 - Yes - - - Active Low, Open Drain 300ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 1.74V
RS-stocknr. 922-2401
FabrikantnummerTPS3808G33DBVT
0,808 €
Each (On a Reel of 250)
Aantal stuks
- 1 - Yes - - - Open Drain 420ms Surface Mount SOT-23 6 2.1 x 2.1 x 0.75mm 3.11V
RS-stocknr. 179-1642
FabrikantnummerTL7705BID
0,436 €
Each (In a Tube of 75)
Aantal stuks
Supply 1 - - 4.6V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 18V
RS-stocknr. 922-2710
FabrikantnummerTPS3801-01DCKR
0,413 €
Each (On a Reel of 3000)
Aantal stuks
Voltage Monitor 1 - - 1.163V - 1.117V - - Surface Mount SC-70 5 2 x 1.25 x 0.9mm -