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. 923-7854
Mfr. Part No.MAX694CPA+
SGD7.777
Each (In a Tube of 50)
units
Power Supply Monitor 1 Yes - 4.75V - 4.5V - - Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 5.5V
RS Stock No. 799-7986
Mfr. Part No.MAX694CPA+
SGD11.15
Each
units
Power Supply Monitor 1 Yes - 4.75V - 4.5V - - Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 5.5V
RS Stock No. 169-8403
Mfr. Part No.DS1233-5+
SGD1.70
Each (In a Tube of 10)
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Through Hole TO-92 3 4.95 x 3.94 x 4.95mm 4.75V
RS Stock No. 732-7282
Mfr. Part No.DS1233-5+
SGD2.23
Each
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Through Hole TO-92 3 4.95 x 3.94 x 4.95mm 4.75V
RS Stock No. 189-7883
Mfr. Part No.MAX8212CPA+
SGD4.405
Each (In a Tube of 50)
units
Microprocessor Voltage Monitor 1 - - 1.19V - 1.11V - - Through Hole PDIP 8 9.91 x 7.87 x 4.45mm -
RS Stock No. 190-1306
Mfr. Part No.MAX6316LUK29CY+T
SGD6.174
Each (In a Pack of 5)
units
Power Supply Monitor 1 Yes Yes 3V - 2.857V - - Surface Mount SOT-23 5 3 x 1.75 x 1.3mm 5.5V
RS Stock No. 191-3937
Mfr. Part No.MAX16060BTE+
SGD11.572
Each (In a Tube of 75)
units
- 4 Yes Yes 5.5V - 0V - - Surface Mount TQFN 16 4.1 x 4.1 x 0.75mm -
RS Stock No. 189-7884
Mfr. Part No.MAX8212CSA+
SGD3.787
Each (In a Tube of 100)
units
Microprocessor Voltage Monitor 1 - - 1.19V - 1.11V - - Surface Mount SOIC 8 5 x 4 x 1.5mm -
RS Stock No. 191-4901
Mfr. Part No.MAX6709OUB+
SGD9.98
Each
units
- 4 - Yes 5.5V - 0V - - Surface Mount μMAX 10 3.05 x 3.05 x 0.95mm 5V
RS Stock No. 783-3618
Mfr. Part No.MAX6373KA+T
SGD5.08
Each (In a Pack of 2)
units
Microprocessor Supervisory Circuit 1 Yes - - - - - - Surface Mount SOT-23 8 3 x 1.75 x 1.3mm -
RS Stock No. 190-4827
Mfr. Part No.DS1233DZ-15+
SGD2.443
Each (In a Tube of 75)
units
Microprocessor Power Supply Supervisor 1 - - - Yes - - 450ms Surface Mount SOT-223 3 + Tab 6.7 x 3.7 x 1.8mm -
RS Stock No. 923-5775
Mfr. Part No.DS1233AZ-10+
SGD2.428
Each (In a Tube of 75)
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Surface Mount SOT-223 3 + Tab 6.5 x 3.5 x 1.8mm 2.97V
RS Stock No. 540-4334
Mfr. Part No.MAX8212CPA+
SGD7.04
Each
units
Microprocessor Voltage Monitor 1 - - 1.19V - 1.11V - - Through Hole PDIP 8 9.91 x 7.87 x 4.45mm -
RS Stock No. 190-4875
Mfr. Part No.MAX823TEUK+T
SGD3.734
Each (On a Reel of 2500)
units
- 1 Yes Yes - - - - 280ms Surface Mount SOT-23 5 3 x 3 x 1.3mm -
RS Stock No. 191-4952
Mfr. Part No.MAX697EWE+
SGD21.95
Each
units
Microprocessor Supervisory Circuit 1 Yes - 5.5V - 1.2V - - Surface Mount SOIC 16 10.5 x 7.6 x 2.35mm -
RS Stock No. 190-1528
Mfr. Part No.DS1832S+
SGD7.435
Each (In a Pack of 2)
units
- 1 Yes Yes - Yes - Active High, Active Low, Push-Pull 1000ms Surface Mount SOIC 8 5 x 4 x 1.5mm 2.97V
RS Stock No. 204-2485
Mfr. Part No.MAX16158F400KN+
SGD2.39
Each (On a Tape of 10)
units
Voltage Monitor 4 No Yes 4.25V - - - - - WLP 4 - -
RS Stock No. 168-2921
Mfr. Part No.MAX17525ATP+
SGD6.835
Each (In a Pack of 2)
units
Overvoltage Protection 1 - - 3.1V - 1V - - Surface Mount TQFN 20 5 x 5 x 0.75mm 60V
RS Stock No. 146-1131
Mfr. Part No.MAX6304CSA+
SGD4.635
Each (In a Tube of 100)
units
- 1 Yes Yes - - - Active High, Push-Pull 5.2ms Surface Mount SOIC 8 5 x 4 x 1.5mm -
RS Stock No. 169-8248
Mfr. Part No.DS1233A-10+
SGD1.64
Each (In a Tube of 10)
units
Microprocessor Power Supply Supervisor 1 - Yes - Yes - Active Low, Open Drain 450ms Through Hole TO-92 3 4.95 x 3.94 x 4.95mm 2.97V