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. 165-3508
FabrikantnummerMCP112T-270E/LB
FabrikantMicrochip
0,156 €
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - Yes - Active Low 130ms Surface Mount SC-70 3 2.25 x 1.35 x 1mm 2.69V
RS-stocknr. 767-3453
FabrikantnummerMCP112T-270E/LB
FabrikantMicrochip
0,165 €
Each (In a Pack of 10)
Aantal stuks
- 1 - - - Yes - Active Low 130ms Surface Mount SC-70 3 2.25 x 1.35 x 1mm 2.69V
RS-stocknr. 768-1533
FabrikantnummerTC54VN4502ECB713
FabrikantMicrochip
0,471 €
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 4.6V
RS-stocknr. 165-3589
FabrikantnummerTC54VN4502ECB713
FabrikantMicrochip
0,339 €
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 4.6V
RS-stocknr. 624-8236
FabrikantnummerSTM1001SWX6F
0,144 €
Each (In a Pack of 10)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3V
RS-stocknr. 168-6317
FabrikantnummerSTM1001SWX6F
0,144 €
Each (On a Reel of 3000)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 280ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3V
RS-stocknr. 806-0785
FabrikantnummerNCP302LSN40T1G
FabrikantON Semiconductor
0,121 €
Each (In a Pack 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. 768-1514
FabrikantnummerTC54VN2102ECB713
FabrikantMicrochip
0,406 €
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 2.14V
RS-stocknr. 912-2834
FabrikantnummerTC54VN2102ECB713
FabrikantMicrochip
0,182 €
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 2.14V
RS-stocknr. 805-2043
FabrikantnummerNCP303LSN09T1G
FabrikantON Semiconductor
0,314 €
Each (On a Tape of 25)
Aantal stuks
Voltage Detector 1 - - 0.918V - 0.882V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS-stocknr. 808-3952
FabrikantnummerNCP302LSN30T1G
FabrikantON Semiconductor
0,372 €
Each (In a Pack of 50)
Aantal stuks
Voltage Detector 1 - - 3.06V - 2.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 163-0676
FabrikantnummerNCP302LSN30T1G
FabrikantON Semiconductor
0,134 €
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 1 - - 3.06V - 2.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 162-9031
FabrikantnummerNCP303LSN09T1G
FabrikantON Semiconductor
0,125 €
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 1 - - 0.918V - 0.882V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
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. 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. 168-5842
FabrikantnummerSTM6822TWY6F
0,305 €
Each (On a Reel of 3000)
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. 686-1491
FabrikantnummerSTM6322SWY6F
0,252 €
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. 662-3390
FabrikantnummerTPS3813K33DBVT
1,576 €
Each (In a Pack of 5)
Aantal stuks
- 1 Yes - - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 578-916
FabrikantnummerSTM6822TWY6F
0,762 €
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. 163-0672
FabrikantnummerNCP302HSN40T1G
FabrikantON Semiconductor
0,11 €
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 1 - - 4.08V - 3.92V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V