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. 686-5800
Mfr. Part No.SP706TCN-L/TR
BrandMaxLinear
TWD46.20
Each (In a Pack of 5)
units
Low Power Microprocessor 1 Yes Yes 3.15V - 3V - - Surface Mount SOIC 8 5 x 3.99 x 1.5mm -
RS Stock No. 177-7093
Mfr. Part No.SP706TCN-L/TR
BrandMaxLinear
TWD10.00
Each (On a Reel of 2500)
units
Low Power Microprocessor 1 Yes Yes 3.15V - 3V - - Surface Mount SOIC 8 5 x 3.99 x 1.5mm -
RS Stock No. 686-5780
Mfr. Part No.SP690AEN-L
BrandMaxLinear
TWD55.00
Each (In a Pack of 5)
units
Low Power Microprocessor 1 Yes - 4.75V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm -
RS Stock No. 177-7094
Mfr. Part No.SP706EN-L/TR
BrandMaxLinear
TWD11.20
Each (On a Reel of 2500)
units
Low Power Microprocessor 1 Yes Yes 4.5V - 4.25V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm -
RS Stock No. 686-5803
Mfr. Part No.SP706EN-L/TR
BrandMaxLinear
TWD29.60
Each (In a Pack of 5)
units
Low Power Microprocessor 1 Yes Yes 4.5V - 4.25V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm -
RS Stock No. 170-4440
Mfr. Part No.SP705EN-L
BrandMaxLinear
TWD24.70
Each (In a Tube of 98)
units
Low Power Microprocessor 1 Yes Yes 4.75V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm -
RS Stock No. 170-4438
Mfr. Part No.SP690AEN-L
BrandMaxLinear
TWD44.90
Each (In a Tube of 98)
units
Low Power Microprocessor 1 Yes - 4.75V - 4.5V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm -