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 Minimum Reset Threshold Voltage Mounting Type Package Type Pin Count Dimensions Maximum Monitored Voltage Maximum Operating Supply Voltage Automotive Standard Maximum Operating Temperature
RS Stock No. 178-8993
Mfr. Part No.TPS3103K33DBVT
kr 27,93
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 3.3 V - +85 °C
RS Stock No. 662-4157
Mfr. Part No.TPS3103K33DBVT
kr 23,15
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 3.3 V - +85 °C
RS Stock No. 145-2807
Mfr. Part No.MC33064D-5G
kr 4,753
Each (In a Tube of 98)
Units
Undervoltage Detector 1 N N 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +85 °C
RS Stock No. 463-381
Mfr. Part No.MC33064D-5G
kr 5,713
Each (In a Pack of 10)
Units
Undervoltage Detector 1 N N 4.7V 4.5V Surface Mount SOIC 8 5 x 4 x 1.5mm - 6.5 V - +85 °C
RS Stock No. 145-5229
Mfr. Part No.NCP300LSN44T1G
kr 1,423
Each (On a Reel of 3000)
Units
Ultra Low Supply Current 1 - - 4.488V 4.312V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS Stock No. 774-7374
Mfr. Part No.TCM809SVLB713
BrandMicrochip
kr 1,493
Each (On a Tape of 15)
Units
Microcontroller Reset Monitor 1 - - 3V 2.85V Surface Mount SC-70 3 2.25 x 2.4 x 1.1mm 5V 5.5 V - +125 °C
RS Stock No. 810-0010
Mfr. Part No.ADM6713LAKSZ-REEL7
kr 6,361
Each (On a Tape of 10)
Units
Microprocessor Supervisory Circuit 1 - Yes 4.63V 4.5V Surface Mount SC-70 4 2.2 x 1.35 x 1mm 5.5V 5.5 V - +125 °C
RS Stock No. 823-7869
Mfr. Part No.MCP1316MT-29KE/OT
BrandMicrochip
kr 5,294
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 5.5 V - +125 °C
RS Stock No. 159-7582
Mfr. Part No.ADM803SAKSZ-REEL7
kr 3,569
Each (On a Reel of 3000)
Units
Microprocessor Supervisory Circuit 1 - - 3.05V 2.81V Surface Mount SC-70 3 2.2 x 1.35 x 1mm 3.3V 5.5 V - +125 °C
RS Stock No. 662-4924
Mfr. Part No.TLC7733IPW
kr 10,846
Each (In a Pack of 5)
Units
Micropower Supply 1 - - 3V 2.86V Surface Mount TSSOP 8 3 x 4.4 x 1.15mm - 6 V - +85 °C
RS Stock No. 159-7955
Mfr. Part No.ADM1184ARMZ
kr 33,85
Each (In a Tube of 50)
Units
Quad Voltage Monitor 4 - - - - Surface Mount MSOP 10 3 x 3 x 0.85mm 5.5V 5.5 V - +85 °C
RS Stock No. 191-3281
Mfr. Part No.MAX809SEUR+T
kr 15,266
Each (On a Reel of 2500)
Units
Micro Processor 1 - - 2.96V 2.89V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm - 5.5 V AEC-Q100 +105 °C
RS Stock No. 919-9427
Mfr. Part No.LTC1728ES5-5#TRMPBF
kr 34,418
Each (On a Reel of 500)
Units
Micropower Triple Supply Monitor 3 - Yes 3.135 V, 4.75 V 3.036 V, 4.6 V Surface Mount SOT-23 5 3.1 x 1.75 x 1.3mm 5V 7 V - +85 °C
RS Stock No. 781-4411
Mfr. Part No.NCP803SN463T1G
kr 3,57
Each (In a Pack of 20)
Units
Microprocessor Reset Monitor - - - 4.88V 4.4V Surface Mount SOT-23 3 2.2 x 1.35 x 0.9mm 4.9V 5.5 V - +105 °C
RS Stock No. 167-7316
Mfr. Part No.BD4940G-TR
BrandROHM
kr 3,412
Each (In a Pack of 50)
Units
CMOS Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4V 10 V - +105 °C
RS Stock No. 806-5027
Mfr. Part No.NCP305LSQ30T1G
kr 3,569
Each (On a Tape of 25)
Units
Voltage Detector 1 - - 3.06V 2.94V Surface Mount SC-82AB 4 2.2 x 1.35 x 1mm - 10 V - +125 °C
RS Stock No. 167-7664
Mfr. Part No.BD5224G-TR
BrandROHM
kr 3,286
Each (In a Pack of 25)
Units
Open Drain Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.4V 10 V - +105 °C
RS Stock No. 167-7528
Mfr. Part No.BD4825G-TR
BrandROHM
kr 2,997
Each (In a Pack of 50)
Units
Open Drain Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.59V 10 V - +105 °C
RS Stock No. 162-7091
Mfr. Part No.TL7757IPK
kr 2,687
Each (On a Reel of 1000)
Units
Voltage Detector 1 - - 4.67V 4.43V Surface Mount SOT-89 3 4.5 x 2.5 x 1.5mm - 7 V - +85 °C
RS Stock No. 167-7682
Mfr. Part No.BD45251G-TR
BrandROHM
kr 5,793
Each (In a Pack of 20)
Units
Open Drain Voltage Detector 1 - Yes - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.59V 10 V - +105 °C
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