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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Description Price 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 Stock No. 822-6821
Mfr. Part No.LTC2954CTS8-2#TRMPBF
£3.54
Each (In a Pack of 2)
Units
- - - - 1V - 0.6V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS Stock No. 169-5631
Mfr. Part No.TL7705ACDR
£0.168
Each (On a Reel of 2500)
Units
Supply 1 - - 4.6V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 10V
RS Stock No. 163-2471
Mfr. Part No.MC34064P-5G
£0.185
Each (In a Bag of 2000)
Units
- 1 - - - - - - - Through Hole TO-92 3 5.2 x 4.19 x 5.33mm 4.7V
RS Stock No. 662-4832
Mfr. Part No.TL7705ACD
£0.449
Each (In a Pack of 10)
Units
Supply 1 - - 4.6V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 10V
RS Stock No. 662-4104
Mfr. Part No.TL7705ACDR
£0.363
Each (In a Pack of 10)
Units
Supply 1 - - 4.6V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 10V
RS Stock No. 165-3584
Mfr. Part No.TC54VC4302ECB713
BrandMicrochip
£0.184
Each (On a Reel of 3000)
Units
- 1 - - - - - Active Low, CMOS - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 4.39V
RS Stock No. 162-9884
Mfr. Part No.TPS3701DDCT
£1.20
Each (On a Reel of 250)
Units
- - - - - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm -
RS Stock No. 912-6886
Mfr. Part No.MCP130T-315I/TT
BrandMicrochip
£0.259
Each (On a Reel of 3000)
Units
- 1 - - - Yes - Open Drain 10µs Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
RS Stock No. 165-3290
Mfr. Part No.MCP1319MT-29LE/OT
BrandMicrochip
£0.397
Each (On a Reel of 3000)
Units
- 1 Yes Yes - - - Active High, Active Low, Open Drain, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS Stock No. 169-0503
Mfr. Part No.BD4830G-TR
BrandROHM
£0.097
Each (On a Reel of 3000)
Units
Open Drain Voltage Detector 1 - - 3.045V - 2.955V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS Stock No. 900-9813
Mfr. Part No.TPS3701DDCT
£2.03
Each (In a Pack of 5)
Units
- - - - - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm -
RS Stock No. 767-3494
Mfr. Part No.MCP130T-315I/TT
BrandMicrochip
£0.36
Each (In a Pack of 10)
Units
- 1 - - - Yes - Open Drain 10µs Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3.15V
RS Stock No. 162-7171
Mfr. Part No.TPS3809L30DBVT
£0.363
Each (On a Reel of 250)
Units
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS Stock No. 738-6308
Mfr. Part No.MCP1319MT-29LE/OT
BrandMicrochip
£0.504
Each (In a Pack of 5)
Units
- 1 Yes Yes - - - Active High, Active Low, Open Drain, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS Stock No. 168-6390
Mfr. Part No.STM1061N22WX6F
£0.127
Each (On a Reel of 3000)
Units
Low Power Voltage Detector 1 - - 2.244V - 2.156V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 662-4236
Mfr. Part No.TPS3809L30DBVT
£0.575
Each (In a Pack of 10)
Units
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS Stock No. 700-3107
Mfr. Part No.BD4830G-TR
BrandROHM
£0.282
Each (In a Pack of 20)
Units
Open Drain Voltage Detector 1 - - 3.045V - 2.955V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS Stock No. 686-4793
Mfr. Part No.STM1061N22WX6F
£0.328
Each (In a Pack of 25)
Units
Low Power Voltage Detector 1 - - 2.244V - 2.156V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm -
RS Stock No. 162-7164
Mfr. Part No.TPS3808G30DBVT
£1.049
Each (On a Reel of 250)
Units
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 2.83V
RS Stock No. 662-3375
Mfr. Part No.TPS3808G30DBVT
£1.244
Each (In a Pack of 5)
Units
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 2.83V