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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Description Price 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 Stock No. 686-1564
Mfr. Part No.STM6823SWY6F
€1.154
Each (In a Pack of 5)
units
- 1 Yes Yes - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
RS Stock No. 906-3319
Mfr. Part No.LTC4365IDDB#TRMPBF
€3.635
Each (In a Pack of 4)
units
Overvoltage Monitor, Undervoltage Monitor 3 - - - - - - - Surface Mount DFN 8 3 x 2 x 0.7mm -
RS Stock No. 158-0419
Mfr. Part No.LTC4365IDDB#TRMPBF
€2.208
Each (On a Reel of 500)
units
Overvoltage Monitor, Undervoltage Monitor 3 - - - - - - - Surface Mount DFN 8 3 x 2 x 0.7mm -
RS Stock No. 168-6348
Mfr. Part No.STM6823SWY6F
€0.464
Each (On a Reel of 3000)
units
- 1 Yes Yes - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
RS Stock No. 169-8403
Mfr. Part No.DS1233-5+
€1.11
Each (In a Tube of 10)
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Through Hole TO-92 3 4.95 x 3.94 x 4.95mm 4.75V
RS Stock No. 761-8982
Mfr. Part No.LTC1326IS8-2.5#PBF
€4.28
Each
units
Micropower Triple Supply Monitor 3 - Yes 2.381V - 2.312V - - Surface Mount SOIC 8 5 x 3.99 x 1.09mm 2.5V
RS Stock No. 732-7282
Mfr. Part No.DS1233-5+
€1.27
Each
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Through Hole TO-92 3 4.95 x 3.94 x 4.95mm 4.75V
RS Stock No. 624-8264
Mfr. Part No.STM1816SWX7F
€0.414
Each (In a Pack of 10)
units
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 2.97V
RS Stock No. 662-4157
Mfr. Part No.TPS3103K33DBVT
€2.322
Each (In a Pack of 5)
units
Ultra Low Supply Current 1 Yes Yes 2.963V - 2.919V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3.6V
RS Stock No. 163-0445
Mfr. Part No.MAX708TESA-TG
€0.223
Each (On a Reel of 2500)
units
- 1 - Yes - Yes - Active High, Active Low, Push-Pull 200ms Surface Mount SOIC 8 5 x 4 x 1.5mm 3.15V
RS Stock No. 806-2466
Mfr. Part No.MAX708TESA-TG
€0.228
Each (On a Tape of 20)
units
- 1 - Yes - Yes - Active High, Active Low, Push-Pull 200ms Surface Mount SOIC 8 5 x 4 x 1.5mm 3.15V
RS Stock No. 145-7393
Mfr. Part No.TPD12S520DBTR
€0.465
Each (On a Reel of 2000)
units
- - - - - - - - - Surface Mount TSSOP 38 9.7 x 4.4 x 1.15mm -
RS Stock No. 145-7366
Mfr. Part No.TL7709ACP
€0.567
Each (In a Tube of 50)
units
Supply 1 - - 7.7V - 7.5V - - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 15V
RS Stock No. 121-6412
Mfr. Part No.CAT811STBI-GT3
€0.122
Each (On a Reel of 3000)
units
Microprocessor Power Supply Supervisor 1 - Yes 3V - 2.85V - - Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V
RS Stock No. 178-5296
Mfr. Part No.MCP102T-300E/TT
BrandMicrochip
€0.339
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Push-Pull 0.13ms Surface Mount SOT-23B 3 3.04 x 1.4 x 1.02mm 3V
RS Stock No. 165-7649
Mfr. Part No.STM1061N34WX6F
€0.154
Each (On a Reel of 3000)
units
Low Power Voltage Detector 1 - - 3.468V - 3.332V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 162-7171
Mfr. Part No.TPS3809L30DBVT
€0.403
Each (On a Reel of 250)
units
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS Stock No. 686-4784
Mfr. Part No.STM1061N34WX6F
€0.399
Each (In a Pack of 25)
units
Low Power Voltage Detector 1 - - 3.468V - 3.332V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 427-389
Mfr. Part No.ADM694ANZ
€2.708
Each (In a Pack of 5)
units
- 1 Yes - - Yes - Active Low, Push-Pull 280ms Through Hole PDIP 8 10.92 x 7.11 x 4.95mm 4.73V
RS Stock No. 662-4236
Mfr. Part No.TPS3809L30DBVT
€0.638
Each (In a Pack of 10)
units
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -