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 Minimum Reset Threshold Voltage Mounting Type Package Type Pin Count Dimensions Maximum Monitored Voltage Maximum Operating Supply Voltage Automotive Standard Maximum Operating Temperature
RS Stock No. 686-4784
Mfr. Part No.STM1061N34WX6F
PHP20.653
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 - 6 V - +85 °C
RS Stock No. 165-7649
Mfr. Part No.STM1061N34WX6F
PHP7.971
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 - 6 V - +85 °C
RS Stock No. 700-3015
Mfr. Part No.BU4833G-TR
BrandROHM
PHP16.996
Each (In a Pack of 20)
units
Voltage Detector 1 - - 3.333V 3.267V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.8V 7 V - +125 °C
RS Stock No. 806-0805
Mfr. Part No.NCP303LSN34T1G
PHP22.79
Each (In a Pack of 25)
units
Voltage Detector 1 - - 3.468V 3.332V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 169-0495
Mfr. Part No.BU4833G-TR
BrandROHM
PHP7.72
Each (On a Reel of 3000)
units
Voltage Detector 1 - - 3.333V 3.267V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.8V 7 V - +125 °C
RS Stock No. 163-0685
Mfr. Part No.NCP303LSN34T1G
PHP9.51
Each (On a Reel of 3000)
units
Voltage Detector 1 - - 3.468V 3.332V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 805-2030
Mfr. Part No.NCP301LSN18T1G
PHP23.185
Each (In a Pack of 25)
units
Ultra Low Supply Current 1 - - 1.836V 1.764V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 806-0763
Mfr. Part No.NCP301LSN46T1G
PHP22.79
Each (In a Pack of 25)
units
Voltage Detector 1 - - 4.692V 4.508V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 163-0669
Mfr. Part No.NCP301LSN46T1G
PHP9.14
Each (On a Reel of 3000)
units
Voltage Detector 1 - - 4.692V 4.508V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 162-9017
Mfr. Part No.NCP301LSN18T1G
PHP8.996
Each (On a Reel of 3000)
units
Ultra Low Supply Current 1 - - 1.836V 1.764V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 920-0123
Mfr. Part No.LTC4365CTS8#TRMPBF
PHP113.37
Each (On a Reel of 500)
units
Overvoltage Protection 1 - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 34 V - +70 °C
RS Stock No. 688-8819
Mfr. Part No.MC33161DG
PHP57.23
Each (In a Pack of 2)
units
Voltage Monitor 1 - - 1.295V 1.245V Surface Mount SOIC 8 5 x 4 x 1.5mm - 40 V - +105 °C
RS Stock No. 463-381
Mfr. Part No.MC33064D-5G
PHP28.234
Each (In a Pack of 10)
units
Undervoltage Detector 1 N N 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +85 °C
RS Stock No. 806-3352
Mfr. Part No.MC33064DM-5R2G
PHP30.92
Each (In a Pack of 20)
units
Undervoltage Detector 1 - - 4.7V 4.5V Surface Mount MSOP 8 3.1 x 3.1 x 0.95mm 5V 10 V - +85 °C
RS Stock No. 125-0039
Mfr. Part No.MC34064D-005G
PHP30.92
Each (In a Tube of 98)
units
Undervoltage Detector 1 - - 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +70 °C
RS Stock No. 178-5443
Mfr. Part No.LTC4365HTS8#TRMPBF
PHP299.842
Each (On a Reel of 500)
units
Overvoltage Protection, Reverse Supply Protection, Undervoltage Protection - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 34 V - +125 °C
RS Stock No. 688-8821
Mfr. Part No.MC34064D-005G
PHP34.095
Each (In a Pack of 2)
units
Undervoltage Detector 1 - - 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +70 °C
RS Stock No. 145-2959
Mfr. Part No.MC33164D-3G
PHP30.92
Each (In a Tube of 98)
units
Micropower Undervoltage Sensing Circuit 1 - - 2.8V 2.55V Surface Mount SOIC 8 5 x 4 x 1.5mm 3V 10 V - +125 °C
RS Stock No. 700-3113
Mfr. Part No.BD4845G-TR
BrandROHM
PHP20.00
Each (In a Pack of 20)
units
Voltage Detector 1 - - 4.568V 4.433V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V 10 V - +105 °C
RS Stock No. 163-2462
Mfr. Part No.MC33064D-5R2G
PHP11.272
Each (On a Reel of 2500)
units
Undervoltage Detector 1 - - 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +85 °C
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