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. 578-916
FabrikantnummerSTM6822TWY6F
0,24 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - - - Active Low, Open Drain 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3.15V
RS-stocknr. 738-6323
FabrikantnummerMCP1320T-29LE/OT
FabrikantMicrochip
0,568 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - - - Active Low, Open Drain 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS-stocknr. 660-6812
FabrikantnummerTPS3820-33QDBVRQ1
1,272 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - - - Active Low - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 686-1491
FabrikantnummerSTM6322SWY6F
0,738 €
Each (In a Pack of 5)
Aantal stuks
- 1 - Yes - - - Active High, Active Low, Open Drain, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
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. 178-8940
FabrikantnummerLTC4365ITS8#TRMPBF
FabrikantAnalog Devices
2,171 €
Each (On a Reel of 2500)
Aantal stuks
Overvoltage Monitor, Undervoltage Monitor 3 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS-stocknr. 709-8114
FabrikantnummerADM708RARZ
FabrikantAnalog Devices
0,892 €
Each (In a Pack of 5)
Aantal stuks
- 1 - Yes - Yes - Active High, Active Low, Push-Pull 280ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.5V
RS-stocknr. 906-3316
FabrikantnummerLTC4365ITS8#TRMPBF
FabrikantAnalog Devices
3,635 €
Each (In a Pack of 4)
Aantal stuks
Overvoltage Monitor, Undervoltage Monitor 3 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
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. 806-0779
FabrikantnummerNCP302HSN40T1G
FabrikantON Semiconductor
0,355 €
Each (On a Tape of 25)
Aantal stuks
Voltage Detector 1 - - 4.08V - 3.92V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS-stocknr. 662-4205
FabrikantnummerTPS3805H33DCKR
0,954 €
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. 761-6075
FabrikantnummerLM809M3-2.63/NOPB
0,519 €
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. 517-2194
FabrikantnummerTPS3305-33D
1,344 €
Each (In a Pack of 5)
Aantal stuks
Microprocessor Power Supply Supervisor 2 Yes Yes - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm -
RS-stocknr. 122-0668
FabrikantnummerAPX809-31SAG-7
FabrikantDiodesZetex
0,063 €
Each (On a Reel of 3000)
Aantal stuks
Microprocessor Reset Monitor 1 - - - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 3 3 x 1.4 x 1mm 3.15V
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. 145-6910
FabrikantnummerTPS3305-33D
1,319 €
Each (In a Tube of 75)
Aantal stuks
Microprocessor Power Supply Supervisor 2 Yes Yes - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm -
RS-stocknr. 624-8365
FabrikantnummerSTM809SWX6F
0,32 €
Each (In a Pack of 10)
Aantal stuks
- 1 - - - - - Active Low, Push-Pull 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3V
RS-stocknr. 162-6280
FabrikantnummerLM809M3-2.63/NOPB
0,265 €
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. 923-5763
FabrikantnummerDS1232LPS-2+
FabrikantMaxim Integrated
2,114 €
Each (In a Tube of 400)
Aantal stuks
Microprocessor Power Supply Supervisor 1 Yes Yes - Yes - Active High, Active Low, Open Drain 1000ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.74V
RS-stocknr. 922-2713
FabrikantnummerTPS3805H33DCKR
0,452 €
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