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. 704-7071
Mfr. Part No.ICL7665SACBAZ-T
$3.93
Each
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Surface Mount SOIC 8 5 x 4 x 1.5mm - 16 V - +70 °C
RS Stock No. 921-5734
Mfr. Part No.ICL7665SAIPAZ
$7.37
Each (In a Pack of 2)
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Through Hole PDIP 8 10.16 x 7.11 x 4.95mm - 16 V - +85 °C
RS Stock No. 923-1503
Mfr. Part No.ICL7665SIBAZ
$5.247
Each (In a Tube of 98)
units
Micropower Voltage Detector 2 - - 1.4V 1.2V Surface Mount SOIC 8 5 x 4 x 1.5mm - 16 V - +85 °C
RS Stock No. 170-8216
Mfr. Part No.ICL7665SACPAZ
$5.322
Each (In a Tube of 50)
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Through Hole PDIP 8 10.16 x 7.11 x 4.95mm - 16 V - +70 °C
RS Stock No. 923-1496
Mfr. Part No.ICL7665SAIPAZ
$6.269
Each (In a Tube of 50)
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Through Hole PDIP 8 10.16 x 7.11 x 4.95mm - 16 V - +85 °C
RS Stock No. 921-5753
Mfr. Part No.ICL7665SIBAZ
$6.17
Each (In a Pack of 2)
units
Micropower Voltage Detector 2 - - 1.4V 1.2V Surface Mount SOIC 8 5 x 4 x 1.5mm - 16 V - +85 °C
RS Stock No. 921-5765
Mfr. Part No.ICL7665SACPAZ
$6.13
Each (In a Pack of 2)
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Through Hole PDIP 8 10.16 x 7.11 x 4.95mm - 16 V - +70 °C
RS Stock No. 645-1527
Mfr. Part No.M51953BL
$0.92
Each (In a Pack of 5)
units
Voltage Detector 1 - - 4.45V 4.05V Through Hole SIP 5 11.7 x 1.97 x 4mm 4.45V 17 V - +85 °C
RS Stock No. 921-5668
Mfr. Part No.ICL7665SAIBAZA
$7.14
Each (In a Pack of 2)
units
Micropower Voltage Detector 2 - - 1.325V 1.275V Surface Mount SOIC 8 5 x 4 x 1.5mm - 16 V - +85 °C
RS Stock No. 645-1505
Mfr. Part No.M51953AL
$0.92
Each (In a Pack of 5)
units
Voltage Detector 1 - - 4.45V 4.05V Through Hole SIP 5 11.7 x 1.97 x 4mm 4.45V 17 V - +85 °C