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. 121-8661
FabrikantnummerTPS3825-33DBVT
€ 1,061
Each (On a Reel of 250)
Aantal stuks
- 1 - Yes - - - Active High, Active Low - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 802-1632
FabrikantnummerNCP361SNT1G
FabrikantON Semiconductor
€ 0,463
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. 517-1135
FabrikantnummerTPS3825-33DBVT
€ 1,108
Each (In a Pack of 5)
Aantal stuks
- 1 - Yes - - - Active High, Active Low - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 3V
RS-stocknr. 145-3228
FabrikantnummerMAX803SQ308D2T1G
FabrikantON Semiconductor
€ 0,147
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. 578-893
FabrikantnummerSTM809LWX6F
€ 0,072
Each (In a Pack of 5)
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. 165-3538
FabrikantnummerTC54VN2902ECB713
FabrikantMicrochip
€ 0,178
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 2.96V
RS-stocknr. 823-1123
FabrikantnummerMCP809T-315I/TT
FabrikantMicrochip
€ 0,18
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. 791-6258
FabrikantnummerNCP301LSN27T1G
FabrikantON Semiconductor
€ 0,355
Each (On a Tape of 25)
Aantal stuks
Voltage Detector 1 No - 2.754V - 2.646V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS-stocknr. 662-3463
FabrikantnummerTPS3836J25DBVT
€ 2,11
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. 662-3227
FabrikantnummerTPS3307-33DGN
€ 3,012
Each (In a Pack of 5)
Aantal stuks
- 3 - Yes - - - Active High, Active Low 280ms Surface Mount MSOP 8 3 x 3 x 1.02mm 4.64V
RS-stocknr. 162-9514
FabrikantnummerNCP301LSN27T1G
FabrikantON Semiconductor
€ 0,127
Each (On a Reel of 3000)
Aantal stuks
Voltage Detector 1 No - 2.754V - 2.646V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
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. 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. 806-2472
FabrikantnummerMAX803SQ308D2T1G
FabrikantON Semiconductor
€ 0,374
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. 162-7153
FabrikantnummerTPS3307-18D
€ 2,394
Each (In a Tube of 75)
Aantal stuks
- 3 - Yes - - - Active High, Active Low 280ms Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.72 V, 3V
RS-stocknr. 121-8855
FabrikantnummerLM809M3-4.63/NOPB
€ 0,271
Each (On a Reel of 1000)
Aantal stuks
- 1 - - - - - Active Low 840ms Surface Mount SOT-23 3 2.92 x 1.3 x 0.93mm 4.75V
RS-stocknr. 412-680
FabrikantnummerADM1232ANZ
FabrikantAnalog Devices
€ 2,098
Each (In a Pack of 5)
Aantal stuks
Microprocessor Voltage Monitor 2 Yes Yes - - - Active High, Active Low, Open Drain, Push-Pull 1000ms Through Hole PDIP 8 9.27 x 7.24 x 3.43mm 4.74V
RS-stocknr. 121-6506
FabrikantnummerNCP300LSN20T1G
FabrikantON Semiconductor
€ 0,154
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. 738-6465
FabrikantnummerMCP130T-300I/TT
FabrikantMicrochip
€ 0,381
Each (In a Pack of 10)
Aantal stuks
- 1 - - - - - Active Low, Open Drain 700ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 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
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