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. 165-7649
Mfr. Part No.STM1061N34WX6F
$0.329
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. 686-4784
Mfr. Part No.STM1061N34WX6F
$0.747
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. 578-853
Mfr. Part No.STM6719SFWB6F
$1.522
Each (In a Pack of 5)
units
Dual/Triple Ultra Low 3 - Yes 3V - 1.02V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 5.5V
RS Stock No. 168-5838
Mfr. Part No.STM6719SFWB6F
$0.642
Each (On a Reel of 3000)
units
Dual/Triple Ultra Low 3 - Yes 3V - 1.02V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 5.5V
RS Stock No. 168-7322
Mfr. Part No.STM809RWX6F
$0.271
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 2.7V
RS Stock No. 168-6391
Mfr. Part No.STM1061N28WX6F
$0.312
Each (On a Reel of 3000)
units
Low Power Voltage Detector 1 - - 2.856V - 2.744V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 168-6320
Mfr. Part No.STM1816SWX7F
$0.351
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 2.97V
RS Stock No. 189-2086
Mfr. Part No.STM6822LWY6FST
$3.076
Each (In a Pack of 5)
units
- 1 Yes Yes 4.746V - 4.514V - - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 2.5 V, 3 V, 3.3 V, 5V
RS Stock No. 165-7648
Mfr. Part No.STM1001TWX6F
$0.361
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Open Drain 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
RS Stock No. 189-1871
Mfr. Part No.STM1818SWX7F
$0.457
Each (On a Reel of 3000)
units
- 1 - Yes - - - Active Low, Open Drain 200ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3 V, 3.3V
RS Stock No. 168-6356
Mfr. Part No.STM1816TWX7F
$0.392
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
RS Stock No. 686-1564
Mfr. Part No.STM6823SWY6F
$2.144
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. 196-2091
Mfr. Part No.STM6719TWWB6F
$0.61
Each (On a Reel of 3000)
units
- 1 - Yes 3.15V - 3V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.3mm 4.63V
RS Stock No. 624-8236
Mfr. Part No.STM1001SWX6F
$0.874
Each (In a Pack of 10)
units
- 1 - - - - - Active Low, Open Drain 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3V
RS Stock No. 624-8315
Mfr. Part No.STM6823TWY6F
$2.346
Each (In a Pack of 10)
units
Microprocessor Voltage Monitor 1 Yes Yes 3.11V - 3.04V - - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm -
RS Stock No. 686-4793
Mfr. Part No.STM1061N22WX6F
$0.747
Each (In a Pack of 25)
units
Low Power Voltage Detector 1 - - 2.244V - 2.156V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 686-1508
Mfr. Part No.STM6322MWY6F
$1.522
Each (In a Pack of 5)
units
- 1 - Yes - - - Active High, Active Low, Open Drain, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.49V
RS Stock No. 196-2013
Mfr. Part No.STM1061N29WX6F
$0.656
Each (In a Pack of 25)
units
Low Power Voltage Detector 1 - - 2.95V - 2.84V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 168-6345
Mfr. Part No.STM6825LWY6F
$0.617
Each (On a Reel of 3000)
units
- 1 - Yes - - - Active High, Active Low, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.74V
RS Stock No. 686-1595
Mfr. Part No.STM1818TWX7F
$1.05
Each (In a Pack of 10)
units
- 1 - Yes - - - Active Low, Open Drain - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V