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. 920-0123
Mfr. Part No.LTC4365CTS8#TRMPBF
SGD3.60
Each (On a Reel of 500)
units
Overvoltage Protection 1 - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 34 V - +70 °C
RS Stock No. 155-7515
Mfr. Part No.LTC2954CTS8-1#TRMPBF
SGD4.286
Each (On a Reel of 500)
units
- - - - 1V 0.6V Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 26.4 V - +70 °C
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 5.5 V - +70 °C
RS Stock No. 822-6815
Mfr. Part No.LTC4365CTS8#TRMPBF
SGD5.565
Each (In a Pack of 2)
units
Overvoltage Protection 1 - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 34 V - +70 °C
RS Stock No. 822-5951
Mfr. Part No.LTC2954CTS8-1#TRMPBF
SGD6.39
Each (In a Pack of 2)
units
- - - - 1V 0.6V Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 26.4 V - +70 °C
RS Stock No. 923-7854
Mfr. Part No.MAX694CPA+
SGD7.70
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 5.5 V - +70 °C
RS Stock No. 789-3929
Mfr. Part No.CAT811TTBI-GT3
SGD0.413
Each (In a Pack of 20)
units
Microprocessor Power Supply Supervisor 1 - Yes 3.15V 3V Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V 5.5 V - +85 °C
RS Stock No. 822-6840
Mfr. Part No.LTC2955ITS8-1#TRMPBF
SGD9.315
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 36 V - +85 °C
RS Stock No. 884-2669
Mfr. Part No.LTC2918IMS-B1#PBF
SGD5.212
Each (In a Pack of 5)
units
Voltage Single Supply Monitor 1 Yes Yes 1.71V 1.656V Surface Mount MSOP 10 3 x 3 x 0.86mm 1.8V 5.5 V - +85 °C
RS Stock No. 124-9970
Mfr. Part No.CAT811TTBI-GT3
SGD0.198
Each (On a Reel of 3000)
units
Microprocessor Power Supply Supervisor 1 - Yes 3.15V 3V Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V 5.5 V - +85 °C
RS Stock No. 920-0133
Mfr. Part No.LTC2955ITS8-1#TRMPBF
SGD5.729
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 36 V - +85 °C
RS Stock No. 162-9514
Mfr. Part No.NCP301LSN27T1G
SGD0.249
Each (On a Reel of 3000)
units
Voltage Detector 1 N - 2.754V 2.646V Surface Mount TSOP 5 3 x 1.5 x 1mm - 10 V - +125 °C
RS Stock No. 761-4621
Mfr. Part No.LMS33460MG/NOPB
SGD0.772
Each (On a Tape of 10)
units
Undervoltage Detector 1 - - 3.15V 2.85V Surface Mount SC-70 5 2 x 1.25 x 0.9mm - 7 V - +85 °C
RS Stock No. 920-0170
Mfr. Part No.LTC2950CTS8-1#TRMPBF
SGD4.405
Each (On a Reel of 500)
units
Push Button Controller 1 - - 1V 0.6V Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 33 (PB) V, 7 (KILL) V 26.4 V - +70 °C
RS Stock No. 162-9516
Mfr. Part No.NCP303LSN45T1G
SGD0.188
Each (On a Reel of 3000)
units
Voltage Detector 1 - - 4.59V 4.41V Surface Mount TSOP 5 3 x 1.5 x 1mm - 10 V - +125 °C
RS Stock No. 823-0827
Mfr. Part No.MCP102T-315E/LB
BrandMicrochip
SGD0.669
Each (In a Pack of 20)
units
Micropower 1 N - 3.08V - Surface Mount SC-70 3 2.25 x 1.35 x 1mm 3.08V 5.5 V - +125 °C
RS Stock No. 517-0895
Mfr. Part No.TL7705BID
SGD1.264
Each (In a Pack of 5)
units
Supply 1 - - 4.6V 4.5V Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 18V 18 V - +85 °C
RS Stock No. 162-6304
Mfr. Part No.LMS33460MG/NOPB
SGD0.357
Each (On a Reel of 1000)
units
Undervoltage Detector 1 - - 3.15V 2.85V Surface Mount SC-70 5 2 x 1.25 x 0.9mm - 7 V - +85 °C
RS Stock No. 155-7569
Mfr. Part No.LTC2954CTS8-2#TRMPBF
SGD4.286
Each (On a Reel of 500)
units
- - - - 1V 0.6V Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm - 26.4 V - +70 °C
RS Stock No. 159-5032
Mfr. Part No.TL7705ACP
SGD1.11
Each
units
Supply 1 - - 4.6V 4.5V Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 10V 18 V - +70 °C
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