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. 738-6465
FabrikantnummerMCP130T-300I/TT
FabrikantMicrochip
€ 0,40
Each (In a Pack of 10)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 700ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS-stocknr. 806-5244
FabrikantnummerNCP300LSN20T1G
FabrikantON Semiconductor
€ 0,49
Each (In a Pack of 25)
Aantal stuks
Voltage Detector 1 - - 2.06V - 1.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 662-3463
FabrikantnummerTPS3836J25DBVT
€ 2,368
Each (In a Pack of 5)
Aantal stuks
- 1 - Yes - - - Active Low, Push-Pull 300ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 2.29V
RS-stocknr. 768-1527
FabrikantnummerTC54VN2902ECB713
FabrikantMicrochip
€ 0,179
Each (In a Pack of 15)
Aantal stuks
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 2.96V
RS-stocknr. 165-3538
FabrikantnummerTC54VN2902ECB713
FabrikantMicrochip
€ 0,178
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 2.96V
RS-stocknr. 791-6258
FabrikantnummerNCP301LSN27T1G
FabrikantON Semiconductor
€ 0,391
Each (On a Tape of 25)
Aantal stuks
Voltage Detector 1 No - 2.754V - 2.646V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 802-4271
FabrikantnummerNCP360SNT1G
FabrikantON Semiconductor
€ 0,544
Each (On a Tape of 25)
Aantal stuks
Overvoltage Protection 1 - - 3.15 V, 5.9V - 2.85V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 160-2621
FabrikantnummerADM6713RAKSZ-REEL7
FabrikantAnalog Devices
€ 0,353
Each (On a Reel of 3000)
Aantal stuks
Microprocessor Supervisory Circuit 1 - Yes 2.63V - 2.55V - - Surface Mount SC-70 4 2.2 x 1.35 x 1mm 5.5V
RS-stocknr. 700-3040
FabrikantnummerBU4933G-TR
FabrikantROHM
€ 0,33
Each (In a Pack of 20)
Aantal stuks
CMOS Voltage Detector 1 - - 3.333V - 3.267V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.8V
RS-stocknr. 802-1632
FabrikantnummerNCP361SNT1G
FabrikantON Semiconductor
€ 0,544
Each (In a Pack of 25)
Aantal stuks
Overvoltage Protection 1 - - 3.15 V, 5.9V - 2.85V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 168-5840
FabrikantnummerSTM809LWX6F
€ 0,121
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.75V
RS-stocknr. 169-0497
FabrikantnummerBU4933G-TR
FabrikantROHM
€ 0,132
Each (On a Reel of 3000)
Aantal stuks
CMOS Voltage Detector 1 - - 3.333V - 3.267V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.8V
RS-stocknr. 687-6033
FabrikantnummerSTM6780SWB6F
€ 0,854
Each (In a Pack of 5)
Aantal stuks
- 2 - Yes - - - Active Low, Open Drain 280ms Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 1.71 V, 3V
RS-stocknr. 877-9101
FabrikantnummerADM9690ARNZ
FabrikantAnalog Devices
€ 1,97
Each (In a Pack of 2)
Aantal stuks
- 1 Yes - - Yes - Active Low 75ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.42V
RS-stocknr. 662-4104
FabrikantnummerTL7705ACDR
€ 0,443
Each (In a Pack of 10)
Aantal stuks
Supply 1 - - 4.6V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 10V
RS-stocknr. 163-2442
FabrikantnummerMAX809STRG
FabrikantON Semiconductor
€ 0,106
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.94mm 3V
RS-stocknr. 712-2778
FabrikantnummerAPX809-29SAG-7
FabrikantDiodesZetex
€ 0,24
Each (In a Pack of 25)
Aantal stuks
Microprocessor Reset Monitor 1 - - - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 3 3 x 1.4 x 1mm 3V
RS-stocknr. 806-2097
FabrikantnummerMC34064SN-5T1G
FabrikantON Semiconductor
€ 0,216
Each (On a Tape of 20)
Aantal stuks
Undervoltage Detector 1 - - 4.7V - 4.5V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 5V
RS-stocknr. 144-5817
FabrikantnummerMCP112T-475E/TT
FabrikantMicrochip
€ 0,287
Each (On a Reel of 3000)
Aantal stuks
Microcontroller & Microprocessor Power Monitor 1 - - - - - - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.746V
RS-stocknr. 662-3472
FabrikantnummerTPS3838K33DBVT
€ 2,368
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 2.99V