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. 162-4891
Mfr. Part No.TPS3828-50DBVT
HK$7.758
Each (On a Reel of 250)
units
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS Stock No. 517-1141
Mfr. Part No.TPS3828-50DBVT
HK$12.58
Each (In a Pack of 5)
units
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS Stock No. 121-9204
Mfr. Part No.TPS3809K33DBVT
HK$4.928
Each (On a Reel of 250)
units
Supply 1 - - 2.99V - 2.87V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS Stock No. 662-4227
Mfr. Part No.TPS3809K33DBVT
HK$7.644
Each (In a Pack of 10)
units
Supply 1 - - 2.99V - 2.87V - - Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm -
RS Stock No. 662-3387
Mfr. Part No.TPS3813I50DBVT
HK$17.608
Each (In a Pack of 5)
units
- 1 Yes - - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 4.65V
RS Stock No. 620-1142
Mfr. Part No.TPS3808G01DBVT
HK$15.278
Each (In a Pack of 5)
units
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm -
RS Stock No. 162-9884
Mfr. Part No.TPS3701DDCT
HK$13.926
Each (On a Reel of 250)
units
- - - - - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm -
RS Stock No. 159-5032
Mfr. Part No.TL7705ACP
HK$7.10
Each
units
Supply 1 - - 4.6V - 4.5V - - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 10V
RS Stock No. 121-8484
Mfr. Part No.TL7705ACP
HK$6.29
Each (In a Tube of 50)
units
Supply 1 - - 4.6V - 4.5V - - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 10V
RS Stock No. 121-8971
Mfr. Part No.TPS3808G01DBVT
HK$9.689
Each (On a Reel of 250)
units
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm -
RS Stock No. 900-9813
Mfr. Part No.TPS3701DDCT
HK$25.158
Each (In a Pack of 5)
units
- - - - - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm -
RS Stock No. 662-3463
Mfr. Part No.TPS3836J25DBVT
HK$24.076
Each (In a Pack of 5)
units
- 1 - Yes - - - Active Low, Push-Pull 300ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 2.29V
RS Stock No. 121-8958
Mfr. Part No.TPS3307-33D
HK$25.997
Each (In a Tube of 75)
units
- 3 - Yes - - - Active High, Active Low 280ms Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 3 V, 4.64V
RS Stock No. 922-2401
Mfr. Part No.TPS3808G33DBVT
HK$9.689
Each (On a Reel of 250)
units
- 1 - Yes - - - Open Drain 420ms Surface Mount SOT-23 6 2.1 x 2.1 x 0.75mm 3.11V
RS Stock No. 145-1216
Mfr. Part No.TPS3705-33DGN
HK$19.395
Each (In a Tube of 80)
units
- 2 Yes Yes - Yes - Active High, Active Low 280ms Surface Mount MSOP 8 3 x 3 x 1.02mm 2.98V
RS Stock No. 145-7591
Mfr. Part No.TPS3809L30QDBVRQ1
HK$2.966
Each (On a Reel of 3000)
units
Supply 1 - - 2.7V - 2.58V - - Surface Mount SOT-23 3 3 x 1.7 x 1.3mm -
RS Stock No. 162-6419
Mfr. Part No.TL7757CLPRE3
HK$4.316
Each (On a Reel of 2000)
units
Voltage Detector 1 - - 4.67V - 4.43V - - Through Hole TO-92 3 4.83 x 3.43 x 3.68mm -
RS Stock No. 145-6750
Mfr. Part No.TPS3808G50DBVT
HK$8.415
Each (On a Reel of 250)
units
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 4.74V
RS Stock No. 162-7205
Mfr. Part No.UC2903DW
HK$53.591
Each (In a Tube of 40)
units
Quad Supply and Line Monitor 4 - - - - - - - Surface Mount SOIC 18 11.62 x 7.52 x 2.35mm -
RS Stock No. 162-4890
Mfr. Part No.TPS3803-01DCKR
HK$3.269
Each (On a Reel of 3000)
units
Voltage Detector 1 - - - - - - - Surface Mount SC-70 5 2 x 1.25 x 0.9mm 6.3V