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. 700-3040
FabrikantnummerBU4933G-TR
FabrikantROHM
€ 0,30
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. 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. 121-6506
FabrikantnummerNCP300LSN20T1G
FabrikantON Semiconductor
€ 0,176
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 1 - - 2.06V - 1.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 162-7155
FabrikantnummerTPS3307-33DGN
€ 2,548
Each (In a Tube of 80)
Aantal stuks
- 3 - Yes - - - Active High, Active Low 280ms Surface Mount MSOP 8 3 x 3 x 1.02mm 4.64V
RS-stocknr. 165-3308
FabrikantnummerMCP130T-300I/TT
FabrikantMicrochip
€ 0,287
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 700ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS-stocknr. 162-7180
FabrikantnummerTPS3836J25DBVT
€ 1,25
Each (On a Reel of 250)
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. 168-5840
FabrikantnummerSTM809LWX6F
€ 0,069
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. 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. 806-2472
FabrikantnummerMAX803SQ308D2T1G
FabrikantON Semiconductor
€ 0,391
Each (In a Pack of 20)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 66ms Surface Mount SC-70 3 2.2 x 1.35 x 0.9mm 3.15V
RS-stocknr. 145-3228
FabrikantnummerMAX803SQ308D2T1G
FabrikantON Semiconductor
€ 0,155
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 66ms Surface Mount SC-70 3 2.2 x 1.35 x 0.9mm 3.15V
RS-stocknr. 662-3463
FabrikantnummerTPS3836J25DBVT
€ 2,154
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. 802-1632
FabrikantnummerNCP361SNT1G
FabrikantON Semiconductor
€ 0,495
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. 823-1123
FabrikantnummerMCP809T-315I/TT
FabrikantMicrochip
€ 0,313
Each (In a Pack of 25)
Aantal stuks
- 1 - - - - - Active Low - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
RS-stocknr. 536-0060
FabrikantnummerLM809M3-4.63/NOPB
€ 0,658
Each (In a Pack of 5)
Aantal stuks
- 1 - - - - - Active Low 840ms Surface Mount SOT-23 3 2.92 x 1.3 x 0.93mm 4.75V
RS-stocknr. 178-5322
FabrikantnummerMCP809T-315I/TT
FabrikantMicrochip
€ 0,173
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
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. 700-3113
FabrikantnummerBD4845G-TR
FabrikantROHM
€ 0,313
Each (In a Pack of 20)
Aantal stuks
Open Drain Voltage Detector 1 - - 4.568V - 4.433V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS-stocknr. 738-6301
FabrikantnummerMCP1318T-29LE/OT
FabrikantMicrochip
€ 0,56
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. 667-4272
FabrikantnummerTCM809SENB713
FabrikantMicrochip
€ 0,132
Each (In a Pack of 20)
Aantal stuks
- 1 - - - - - Active Low, Push-Pull 560ms Surface Mount SOT-23B 3 3.05 x 1.4 x 1.02mm 3V
RS-stocknr. 738-6550
FabrikantnummerMCP112T-450E/TT
FabrikantMicrochip
€ 0,381
Each (On a Tape of 10)
Aantal stuks
- 1 - - - - - - - Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 4.49V