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. 921-5753
Mfr. Part No.ICL7665SIBAZ
HK$31.83
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 -
RS Stock No. 193-1535
Mfr. Part No.ISL88011IH544Z-T7A
HK$13.483
Each (On a Reel of 250)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 4.45V
RS Stock No. 193-1536
Mfr. Part No.ISL88011IH544Z-T7A
HK$22.65
Each (In a Pack of 5)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 4.45V
RS Stock No. 923-1496
Mfr. Part No.ICL7665SAIPAZ
HK$31.91
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 -
RS Stock No. 496-820
Mfr. Part No.ICL7673CPAZ
HK$17.90
Each (In a Pack of 5)
units
- - - - - - - - - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm -
RS Stock No. 921-5466
Mfr. Part No.ICL7673CPAZ
HK$19.23
Each (In a Pack of 5)
units
- - - - - - - - - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm -
RS Stock No. 923-1503
Mfr. Part No.ICL7665SIBAZ
HK$27.07
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 -
RS Stock No. 704-7071
Mfr. Part No.ICL7665SACBAZ-T
HK$33.80
Each
units
Micropower Voltage Detector 2 - - 1.325V - 1.275V - - Surface Mount SOIC 8 5 x 4 x 1.5mm -
New
RS Stock No. 196-9043
Mfr. Part No.HIP1020CKZ-T
HK$29.35
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
RS Stock No. 193-1528
Mfr. Part No.ISL88011IH523Z-T7A
HK$23.618
Each (In a Pack of 5)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 2.35V
RS Stock No. 645-1527
Mfr. Part No.M51953BL
HK$4.576
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
RS Stock No. 193-1527
Mfr. Part No.ISL88011IH523Z-T7A
HK$14.101
Each (On a Reel of 250)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 2.35V
RS Stock No. 645-1505
Mfr. Part No.M51953AL
HK$4.576
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
RS Stock No. 923-1351
Mfr. Part No.ICL7665SCBAZ
HK$19.91
Each (In a Tube of 98)
units
- 2 - - - - - - - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.4V
RS Stock No. 170-8221
Mfr. Part No.X5043S8Z
HK$28.166
Each (In a Tube of 100)
units
- 1 Yes - - - - Active Low 400ms Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.5V
RS Stock No. 193-1531
Mfr. Part No.ISL88011IH529Z-T7A
HK$14.101
Each (On a Reel of 250)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 2.96V
RS Stock No. 921-5734
Mfr. Part No.ICL7665SAIPAZ
HK$38.985
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 -
RS Stock No. 193-1537
Mfr. Part No.ISL88011IH546Z-T7A
HK$13.483
Each (On a Reel of 250)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 4.71V
RS Stock No. 170-8216
Mfr. Part No.ICL7665SACPAZ
HK$25.647
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 -
RS Stock No. 193-1532
Mfr. Part No.ISL88011IH529Z-T7A
HK$23.618
Each (In a Pack of 5)
units
- 1 - Yes - - - Active High - Surface Mount SOT-23 5 3 x 1.7 x 1.3mm 2.96V