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. 165-2159
Mfr. Part No.MCP1316MT-29ME/OT
BrandMicrochip
R 8.563
Each (On a Reel of 3000)
units
Micropower 1 Yes Yes 0.174V - 0.029V - - Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.9V
RS stock no. 823-3469
Mfr. Part No.MCP1316MT-29ME/OT
BrandMicrochip
R 10.369
Each (In a Pack of 20)
units
Micropower 1 Yes Yes 0.174V - 0.029V - - Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.9V
RS stock no. 178-5293
Mfr. Part No.MCP100T-300I/TT
BrandMicrochip
R 4.586
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Push-Pull - Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS stock no. 738-6382
Mfr. Part No.MCP100T-300I/TT
BrandMicrochip
R 6.002
Each (In a Pack of 10)
units
- 1 - - - - - Active Low, Push-Pull - Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS stock no. 768-1518
Mfr. Part No.TC54VN2702ECB713
BrandMicrochip
R 7.141
Each (In a Pack of 15)
units
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 2.75V
RS stock no. 165-3586
Mfr. Part No.TC54VN2702ECB713
BrandMicrochip
R 5.972
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Open Drain - Surface Mount SOT-23A 3 3.1 x 1.8 x 1.3mm 2.75V
RS stock no. 774-7377
Mfr. Part No.TCM809TVLB713
BrandMicrochip
R 2.669
Each (On a Tape of 15)
units
Microcontroller Reset Monitor 1 - - 3.15V - 3V - - Surface Mount SC-70 3 2.25 x 2.4 x 1.1mm 5V
RS stock no. 817-3660
Mfr. Part No.MCP809T-300I/TT
BrandMicrochip
R 5.594
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low 700ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 3V
RS stock no. 767-3399
Mfr. Part No.MCP100T-485I/TT
BrandMicrochip
R 5.932
Each (In a Pack of 15)
units
- 1 - - - Yes - Push-Pull 10µs Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.85V
RS stock no. 165-3308
Mfr. Part No.MCP130T-300I/TT
BrandMicrochip
R 5.659
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Open Drain 700ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS stock no. 178-5300
Mfr. Part No.MCP100T-485I/TT
BrandMicrochip
R 4.586
Each (On a Reel of 3000)
units
- 1 - - - Yes - Push-Pull 10µs Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.85V
RS stock no. 774-7387
Mfr. Part No.TCM810TVNB713
BrandMicrochip
R 5.636
Each (In a Bag of 15)
units
Microcontroller Reset Monitor 1 - - 3.15V - 3V - - Surface Mount SOT-23B 3 3.04 x 2.64 x 1.12mm 5V
RS stock no. 738-6465
Mfr. Part No.MCP130T-300I/TT
BrandMicrochip
R 7.465
Each (In a Pack of 10)
units
- 1 - - - - - Active Low, Open Drain 700ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.95mm 3V
RS stock no. 165-2262
Mfr. Part No.TCM810TVNB713
BrandMicrochip
R 4.317
Each (On a Reel of 3000)
units
Microcontroller Reset Monitor 1 - - 3.15V - 3V - - Surface Mount SOT-23B 3 3.04 x 2.64 x 1.12mm 5V
RS stock no. 165-2260
Mfr. Part No.TCM809TVLB713
BrandMicrochip
R 2.634
Each (On a Reel of 3000)
units
Microcontroller Reset Monitor 1 - - 3.15V - 3V - - Surface Mount SC-70 3 2.25 x 2.4 x 1.1mm 5V
RS stock no. 165-3506
Mfr. Part No.MCP112T-240E/TT
BrandMicrochip
R 5.587
Each (On a Reel of 3000)
units
- 1 - - - Yes - Active Low 130ms Surface Mount SOT-23B 3 3.04 x 1.4 x 1.02mm 2.37V
RS stock no. 165-3595
Mfr. Part No.MCP120-450DI/TO
BrandMicrochip
R 5.749
Each (In a Bag of 1000)
units
- 1 No - - No - Active Low, Open Drain 700ms Through Hole TO-92 3 4.71 x 3.62 x 4.62mm 4.5V
RS stock no. 144-9252
Mfr. Part No.TC1232COA
BrandMicrochip
R 16.491
Each (In a Tube of 100)
units
- 1 Yes Yes - Yes - Active High, Active Low, Open Drain, Push-Pull 1000ms Surface Mount SOIC 8 4.9 x 3.91 x 1.42mm 4.74V
RS stock no. 738-6323
Mfr. Part No.MCP1320T-29LE/OT
BrandMicrochip
R 10.672
Each (In a Pack of 5)
units
- 1 Yes Yes - - - Active Low, Open Drain 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS stock no. 738-6285
Mfr. Part No.MCP1316T-29LE/OT
BrandMicrochip
R 10.50
Each (In a Pack of 5)
units
- 1 Yes Yes - - - Active Low, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V