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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제품설명 단가 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 제품 번호 121-9204
제조사 부품 번호TPS3809K33DBVT
₩612.25
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Supply 1 - - 2.99V 2.87V Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm - 6 V - +85 °C
RS 제품 번호 662-4227
제조사 부품 번호TPS3809K33DBVT
₩950.15
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Supply 1 - - 2.99V 2.87V Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm - 6 V - +85 °C
RS 제품 번호 169-0502
제조사 부품 번호BD4842G-TR
제조사ROHM
₩161.20
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Voltage Detector 1 - - 4.263V 4.137V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V 10 V - +105 °C
RS 제품 번호 700-3104
제조사 부품 번호BD4842G-TR
제조사ROHM
₩466.55
Each (In a Pack of 20)
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Voltage Detector 1 - - 4.263V 4.137V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V 10 V - +105 °C
RS 제품 번호 121-8959
제조사 부품 번호TPS3823-50DBVT
₩1,598.05
Each (On a Reel of 250)
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Processor 1 Yes Yes 4.64V 4.46V Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 5.8V 5.5 V - +85 °C
RS 제품 번호 189-1870
제조사 부품 번호STM1061N31WX6F
₩226.30
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Voltage Detector 1 - - 3.162V 3.038V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 5.5V 6 V - +85 °C
RS 제품 번호 189-2136
제조사 부품 번호STM1061N31WX6F
₩587.45
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Voltage Detector 1 - - 3.162V 3.038V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 5.5V 6 V - +85 °C
RS 제품 번호 620-0694
제조사 부품 번호TPS3823-50DBVT
₩1,424.45
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Processor 1 Yes Yes 4.64V 4.46V Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 5.8V 5.5 V - +85 °C
RS 제품 번호 163-0682
제조사 부품 번호NCP303LSN30T1G
제조사ON Semiconductor
₩234.05
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Voltage Monitor 1 - - 4.4V 2.59V Surface Mount TSOP 5 3 x 1.5 x 1mm - 10 V - +125 °C
RS 제품 번호 121-8484
제조사 부품 번호TL7705ACP
₩781.20
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Supply 1 - - 4.6V 4.5V Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 10V 18 V - +70 °C
RS 제품 번호 156-5701
제조사 부품 번호LTC2912ITS8-2#TRMPBF
제조사Analog Devices
₩3,709.15
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Overvoltage Monitor, Undervoltage Monitor 1 - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 3.3V 6 V - +85 °C
RS 제품 번호 789-3929
제조사 부품 번호CAT811TTBI-GT3
제조사ON Semiconductor
₩458.80
Each (In a Pack of 20)
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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 제품 번호 162-9884
제조사 부품 번호TPS3701DDCT
₩2,159.15
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- - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm - - - +125 °C
RS 제품 번호 789-3925
제조사 부품 번호CAT811STBI-GT3
제조사ON Semiconductor
₩488.25
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Microprocessor Power Supply Supervisor 1 - Yes 3V 2.85V Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V 5.5 V - +85 °C
RS 제품 번호 700-3132
제조사 부품 번호BD5230G-TR
제조사ROHM
₩451.05
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Voltage Detector 1 - - 3.03V 2.97V Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V 10 V - +105 °C
RS 제품 번호 165-7703
제조사 부품 번호STM1061N25WX6F
₩209.25
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Low Power Voltage Detector 1 - - 2.55V 2.45V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm - 6 V - +85 °C
RS 제품 번호 686-4784
제조사 부품 번호STM1061N34WX6F
₩587.45
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Low Power Voltage Detector 1 - - 3.468V 3.332V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm - 6 V - +85 °C
RS 제품 번호 165-7649
제조사 부품 번호STM1061N34WX6F
₩226.30
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Low Power Voltage Detector 1 - - 3.468V 3.332V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm - 6 V - +85 °C
RS 제품 번호 163-0671
제조사 부품 번호NCP302HSN27T1G
제조사ON Semiconductor
₩212.35
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Voltage Detector 1 - - 2.781V 2.619V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS 제품 번호 806-7966
제조사 부품 번호AD8280WASTZ
제조사Analog Devices
₩10,950.75
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Battery Backup Monitor - - - 4.6V 3.6V Surface Mount LQFP 48 7.2 x 7.2 x 1.45mm - 30 V - +105 °C