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. 145-3361
FabrikantnummerNCP803SN293D3T1G
FabrikantON Semiconductor
€ 0,127
Each (On a Reel of 3000)
Aantal stuks
Microprocessor Reset Monitor 1 No - 3.08V - 2.78V - - Surface Mount SOT-23 3 2.2 x 1.35 x 0.9mm 4.9V
RS-stocknr. 738-6301
FabrikantnummerMCP1318T-29LE/OT
FabrikantMicrochip
€ 0,532
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - - - Active High, Active Low, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS-stocknr. 922-4750
FabrikantnummerTPS3838K33DBVT
€ 1,25
Each (On a Reel of 250)
Aantal stuks
- 1 - Yes - - - Active Low, Open Drain 300ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 2.99V
RS-stocknr. 124-5356
FabrikantnummerNCP361SNT1G
FabrikantON Semiconductor
€ 0,199
Each (On a Reel of 3000)
Aantal stuks
Overvoltage Protection 1 - - 3.15 V, 5.9V - 2.85V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 806-2097
FabrikantnummerMC34064SN-5T1G
FabrikantON Semiconductor
€ 0,192
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. 688-8809
FabrikantnummerMAX809STRG
FabrikantON Semiconductor
€ 0,39
Each (In a Pack of 2)
Aantal stuks
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.94mm 3V
RS-stocknr. 163-0563
FabrikantnummerMC34064SN-5T1G
FabrikantON Semiconductor
€ 0,193
Each (On a Reel of 3000)
Aantal stuks
Undervoltage Detector 1 - - 4.7V - 4.5V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 5V
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. 858-0901
FabrikantnummerLTC4365HTS8#TRMPBF
FabrikantAnalog Devices
€ 3,775
Each (In a Pack of 2)
Aantal stuks
Overvoltage Monitor, Undervoltage Monitor - - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS-stocknr. 379-2718
FabrikantnummerMCP809T-475I/TT
FabrikantMicrochip
€ 0,176
Each (In a Pack of 5)
Aantal stuks
- 1 No - - No - Active Low, Push-Pull - Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 4.75V
RS-stocknr. 662-3347
FabrikantnummerTPS3707-33DR
€ 1,892
Each (In a Pack of 5)
Aantal stuks
- 2 - Yes - Yes - Active High, Active Low 280ms Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 2.98V
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. 121-8971
FabrikantnummerTPS3808G01DBVT
€ 0,95
Each (On a Reel of 250)
Aantal stuks
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm -
RS-stocknr. 412-406
FabrikantnummerADM706TARZ
FabrikantAnalog Devices
€ 2,184
Each (In a Pack of 5)
Aantal stuks
- 1 Yes Yes - Yes - Active Low, Push-Pull 280ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.5V
RS-stocknr. 770-9448
FabrikantnummerMCP112T-475E/TT
FabrikantMicrochip
€ 0,381
Each (In a Pack of 15)
Aantal stuks
Microcontroller & Microprocessor Power Monitor 1 - - - - - - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.746V
RS-stocknr. 687-6033
FabrikantnummerSTM6780SWB6F
€ 0,746
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. 822-5976
FabrikantnummerLTC2950ITS8-2#TRMPBF
FabrikantAnalog Devices
€ 4,745
Each (In a Pack of 2)
Aantal stuks
- - - - 1V - 0.6V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS-stocknr. 768-1520
FabrikantnummerTC54VN3002ECB713
FabrikantMicrochip
€ 0,406
Each (On a Tape of 15)
Aantal stuks
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 3.06V
RS-stocknr. 168-6717
FabrikantnummerSTM6780SWB6F
€ 0,299
Each (On a Reel of 3000)
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. 122-0667
FabrikantnummerAPX809-29SAG-7
FabrikantDiodesZetex
€ 0,073
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 3V