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. 662-4157
Mfr. Part No.TPS3103K33DBVT
kr 42,224
Each (In a Pack of 5)
Units
Ultra Low Supply Current 1 Yes Yes 2.963V - 2.919V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3.6V
RS Stock No. 178-8993
Mfr. Part No.TPS3103K33DBVT
kr 27,532
Each (On a Reel of 3000)
Units
Ultra Low Supply Current 1 Yes Yes 2.963V - 2.919V - - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 3.6V
RS Stock No. 163-2471
Mfr. Part No.MC34064P-5G
Brandonsemi
kr 3,408
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. 923-5763
Mfr. Part No.DS1232LPS-2+
kr 21,081
Each (In a Tube of 400)
Units
Microprocessor Power Supply Supervisor 1 Yes Yes - Yes - Active High, Active Low, Open Drain 1000ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.74V
RS Stock No. 145-2807
Mfr. Part No.MC33064D-5G
Brandonsemi
kr 6,726
Each (In a Tube of 98)
Units
Undervoltage Detector 1 No No 4.7V - 4.5V - - Surface Mount SOIC 8 5 x 4 x 1.5mm -
RS Stock No. 463-381
Mfr. Part No.MC33064D-5G
Brandonsemi
kr 7,947
Each (In a Pack of 10)
Units
Undervoltage Detector 1 No No 4.7V - 4.5V - - Surface Mount SOIC 8 5 x 4 x 1.5mm -
RS Stock No. 516-5067
Mfr. Part No.MC34064P-5G
Brandonsemi
kr 9,24
Each
Units
- 1 - - - - - - - Through Hole TO-92 3 5.2 x 4.19 x 5.33mm 4.7V
RS Stock No. 165-4590
Mfr. Part No.MCP130T-475I/TT
BrandMicrochip
kr 4,956
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 4.75V
RS Stock No. 235-4648
Mfr. Part No.MIC2775-31YM5-TR
BrandMicrochip
kr 9,752
Each (In a Pack of 10)
Units
Power Supply Sequencer 1 No Yes 3.09V No - - - - SOT-23 5 - -
RS Stock No. 810-0016
Mfr. Part No.ADM6713RAKSZ-REEL7
kr 13,568
Each (On a Tape of 10)
Units
Microprocessor Supervisory Circuit 1 - Yes 2.63V - 2.55V - - Surface Mount SC-70 4 2.2 x 1.35 x 1mm 5.5V
RS Stock No. 178-5302
Mfr. Part No.MCP101T-315I/TT
BrandMicrochip
kr 4,047
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 3.15V
RS Stock No. 822-8625
Mfr. Part No.APX809-40SAG-7
kr 3,551
Each (In a Pack of 50)
Units
Microprocessor Reset Monitor 1 - - - - - Active Low 280ms Surface Mount SOT-23 3 3 x 1.4 x 1mm 4.08V
RS Stock No. 190-5834
Mfr. Part No.MAX8215CSD+
kr 91,70
Each (In a Pack of 2)
Units
- 1 - - - - - Open Drain - Surface Mount SOIC 14 8.75 x 4 x 1.5mm -
RS Stock No. 662-4949
Mfr. Part No.TPS3510D
kr 18,004
Each (In a Pack of 5)
Units
Overvoltage Monitor, Undervoltage Monitor 3 - - 13.8V - 2.2V - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm -
RS Stock No. 171-7314
Mfr. Part No.BD5345FVE-TR
BrandROHM
kr 1,74
Each (On a Reel of 3000)
Units
CMOS Voltage Detector 1 - - - - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 4.5V
RS Stock No. 167-9240
Mfr. Part No.BU4228G-TR
BrandROHM
kr 3,798
Each (On a Reel of 3000)
Units
Open Drain Voltage Detector 1 - - - - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.2mm 2.8V
RS Stock No. 163-0903
Mfr. Part No.CAT809RTBI-GT3
Brandonsemi
kr 1,621
Each (On a Reel of 3000)
Units
Microprocessor Power Supply Supervisor - - - 2.7V - 2.55V - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.12mm 5V
RS Stock No. 767-3494
Mfr. Part No.MCP130T-315I/TT
BrandMicrochip
kr 6,425
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
New
RS Stock No. 239-5616
Mfr. Part No.TC1270ANRVRCTR
BrandMicrochip
kr 9,121
Each (In a Pack of 10)
Units
Precision Monitor - - Yes - - - - - - SOT 143 - - -
New
RS Stock No. 244-9835
Mfr. Part No.MIC803-31D2VC3-TR
BrandMicrochip
kr 2,865
Each (On a Reel of 3000)
Units
Microprocessor Supervisory Circuit - No No 2.76V No - - - - - - - -