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. 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. 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. 700-3113
FabrikantnummerBD4845G-TR
FabrikantROHM
€ 0,345
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. 700-3132
FabrikantnummerBD5230G-TR
FabrikantROHM
€ 0,108
Each (In a Pack of 20)
Aantal stuks
Open Drain Voltage Detector 1 - - 3.03V - 2.97V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS-stocknr. 168-1196
FabrikantnummerBU4823FVE-TR
FabrikantROHM
€ 0,215
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 2.3V
RS-stocknr. 700-3003
FabrikantnummerBU4830G-TR
FabrikantROHM
€ 0,33
Each (In a Pack of 20)
Aantal stuks
Open Drain Voltage Detector 1 - - 3.03V - 2.97V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.8V
RS-stocknr. 168-1295
FabrikantnummerBU4227F-TR
FabrikantROHM
€ 0,476
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SOP 4 2 x 1.25 x 0.9mm 2.7V
RS-stocknr. 171-7452
FabrikantnummerBU4822FVE-TR
FabrikantROHM
€ 0,418
Each (In a Pack of 20)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 2.2V
RS-stocknr. 168-1120
FabrikantnummerBU4228G-TR
FabrikantROHM
€ 0,376
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.8V
RS-stocknr. 167-7736
FabrikantnummerBD5240G-TR
FabrikantROHM
€ 0,34
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4V
Nieuw
RS-stocknr. 215-9647
FabrikantnummerBM1Z103FJ-E2
FabrikantROHM
€ 2,744
Each (In a Pack of 5)
Aantal stuks
- - - - - - - - - - SOP-J11 11 - -
RS-stocknr. 124-6491
FabrikantnummerBD87A29FVM-TR
FabrikantROHM
€ 1,44
Each (In a Pack of 5)
Aantal stuks
- 2 Yes - - - - Active Low 10.1ms Surface Mount MSOP 8 2.9 x 2.8 x 0.75mm 2.97V
RS-stocknr. 184-8333
FabrikantnummerBD49E30G-TR
FabrikantROHM
€ 0,32
Each (In a Pack of 50)
Aantal stuks
CMOS Voltage Detector 1 - - - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 3V
RS-stocknr. 168-1147
FabrikantnummerBU4842G-TR
FabrikantROHM
€ 0,336
Each (In a Pack of 50)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.39V
RS-stocknr. 185-0849
FabrikantnummerBU4231F-TR
FabrikantROHM
€ 0,476
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SOP 4 2.1 x 2 x 0.9mm 3.1V
RS-stocknr. 185-0832
FabrikantnummerBD46411G-TR
FabrikantROHM
€ 0,508
Each (In a Pack of 25)
Aantal stuks
CMOS Voltage Detector 1 - Yes - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4.1V
RS-stocknr. 185-0813
FabrikantnummerBU45K362G-TL
FabrikantROHM
€ 0,447
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SSOP 3 2.9 x 1.6 x 1.1mm 3.6V
RS-stocknr. 167-7716
FabrikantnummerBD5228FVE-TR
FabrikantROHM
€ 0,424
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 2.8V
RS-stocknr. 168-1209
FabrikantnummerBU4825FVE-TR
FabrikantROHM
€ 0,215
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 2.61V
RS-stocknr. 168-1037
FabrikantnummerBU4212F-TR
FabrikantROHM
€ 0,486
Each (In a Pack of 25)
Aantal stuks
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SOP 4 2 x 1.25 x 0.9mm 1.2V