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. 156-5701
Mfr. Part No.LTC2912ITS8-2#TRMPBF
HK$27.522
Each (On a Reel of 500)
units
Overvoltage Monitor, Undervoltage Monitor 1 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 3.3V
RS Stock No. 412-860
Mfr. Part No.ADM691ARZ
HK$36.362
Each (In a Pack of 5)
units
Microprocessor Supervisory Circuit 1 Yes - - Yes - Active High, Active Low, Push-Pull 70ms Surface Mount SOIC 16 - 4.75V
RS Stock No. 523-7392
Mfr. Part No.ADM705ANZ
HK$23.99
Each
units
- 1 Yes Yes - Yes - Active Low, Push-Pull 280ms Through Hole PDIP 8 9.27 x 7.24 x 3.43mm 4.75V
RS Stock No. 858-0908
Mfr. Part No.LTC2912ITS8-2#TRMPBF
HK$40.52
Each (In a Pack of 5)
units
Overvoltage Monitor, Undervoltage Monitor 1 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 3.3V
RS Stock No. 912-6356
Mfr. Part No.ADM809LARTZ-REEL7
HK$10.122
Each (On a Reel of 3000)
units
- 1 - - - - - Active Low, Push-Pull 840ms Surface Mount SOT-23 3 2.9 x 1.3 x 1.02mm 4.75V
RS Stock No. 709-5238
Mfr. Part No.ADM709TARZ
HK$17.366
Each (In a Pack of 5)
units
- 1 - - - - - Active Low, Push-Pull 380ms Surface Mount SOIC 8 5 x 4 x 1.5mm 4.75V
RS Stock No. 822-6815
Mfr. Part No.LTC4365CTS8#TRMPBF
HK$34.775
Each (In a Pack of 2)
units
Overvoltage Protection 1 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS Stock No. 884-2657
Mfr. Part No.LTC2901-1IGN#PBF
HK$58.65
Each (In a Pack of 2)
units
Programmable Quad Supply Monitor 4 Yes - 3.135V - 3.036V - - Surface Mount SSOP 16 5 x 4 x 1.5mm 3.3V
RS Stock No. 810-0004
Mfr. Part No.ADM6713TAKSZ-REEL7
HK$6.654
Each (On a Tape of 10)
units
Microprocessor Supervisory Circuit 1 - Yes 3.08V - 3V - - Surface Mount SC-70 4 2.2 x 1.35 x 1mm 5.5V
RS Stock No. 850-7925
Mfr. Part No.ADM811RARTZ-REEL7
HK$13.308
Each (In a Pack of 5)
units
- 1 - Yes - - - Active Low, Push-Pull 560ms Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 2.7V
RS Stock No. 819-7111
Mfr. Part No.ADM803RAKSZ-REEL7
HK$6.407
Each (In a Pack of 10)
units
- 1 - - - - - Active Low, Open Drain 840ms Surface Mount SC-70 3 2.2 x 1.35 x 1mm 2.7V
RS Stock No. 153-3182
Mfr. Part No.ADM6320CZ27ARJZ-R7
HK$15.512
Each (In a Pack of 5)
units
Supervisory Circuits with Watchdog - Yes Yes 2.7V - - - - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm -
RS Stock No. 742-7736
Mfr. Part No.ADM809RARTZ-REEL7
HK$16.305
Each (In a Pack of 2)
units
- 1 - - - - - Active Low, Push-Pull 840ms Surface Mount SOT-23 3 3.04 x 1.4 x 1.12mm 2.7V
RS Stock No. 155-7520
Mfr. Part No.LTC2950ITS8-2#TRMPBF
HK$33.297
Each (On a Reel of 500)
units
- - - - 1V - 0.6V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm -
RS Stock No. 822-6821
Mfr. Part No.LTC2954CTS8-2#TRMPBF
HK$41.425
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. 159-7694
Mfr. Part No.ADM708ARZ-REEL
HK$13.012
Each (On a Reel of 2500)
units
Microprocessor Supervisory Circuit 1 - Yes 4.5V - 4.25V - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5.5V
RS Stock No. 822-6843
Mfr. Part No.LTC2917IMS-A1#PBF
HK$31.72
Each (In a Pack of 5)
units
Voltage Monitor 1 Yes - 11.4V - 11.04V - - Surface Mount MSOP 10 3 x 3 x 0.86mm 12V
RS Stock No. 709-8073
Mfr. Part No.ADM696ARZ
HK$28.20
Each
units
- 1 Yes - - Yes - Active High, Active Low, Push-Pull 70ms Surface Mount SOIC W 16 10.5 x 7.6 x 2.35mm -
RS Stock No. 155-9290
Mfr. Part No.LTC2955ITS8-2#TRMPBF
HK$39.575
Each (On a Reel of 500)
units
Push Button Controller 1 - - 0.84V - 0.76V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 36V
RS Stock No. 822-6837
Mfr. Part No.LTC2955CTS8-1#TRMPBF
HK$48.26
Each (In a Pack of 2)
units
Push Button Controller 1 - - 0.84V - 0.76V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 36V