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庫存編號 121-9204
製造零件編號TPS3809K33DBVT
HK$3.952
個 (在毎卷:250)
單位
Supply 1 - - 2.99V 2.87V Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm - 6 V - +85 °C
RS庫存編號 662-4227
製造零件編號TPS3809K33DBVT
HK$6.128
/個 (每包:10個)
單位
Supply 1 - - 2.99V 2.87V Surface Mount SOT-23 3 2.9 x 1.6 x 1.15mm - 6 V - +85 °C
RS庫存編號 169-0502
製造零件編號BD4842G-TR
BrandROHM
HK$1.045
個 (在毎卷:3000)
單位
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庫存編號 700-3104
製造零件編號BD4842G-TR
BrandROHM
HK$3.012
/個 (每包:20個)
單位
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庫存編號 121-8959
製造零件編號TPS3823-50DBVT
HK$10.31
個 (在毎卷:250)
單位
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庫存編號 189-2136
製造零件編號STM1061N31WX6F
HK$3.79
/個 (每包:25個)
單位
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庫存編號 620-0694
製造零件編號TPS3823-50DBVT
HK$9.187
/個 (每包:10個)
單位
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庫存編號 189-1870
製造零件編號STM1061N31WX6F
HK$1.463
個 (在毎卷:3000)
單位
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庫存編號 165-7649
製造零件編號STM1061N34WX6F
HK$1.463
個 (在毎卷:3000)
單位
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庫存編號 686-4778
製造零件編號STM1061N25WX6F
HK$3.79
/個 (每包:25個)
單位
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庫存編號 700-3132
製造零件編號BD5230G-TR
BrandROHM
HK$2.907
/個 (每包:20個)
單位
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庫存編號 165-7703
製造零件編號STM1061N25WX6F
HK$1.349
個 (在毎卷:3000)
單位
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庫存編號 578-853
製造零件編號STM6719SFWB6F
HK$8.106
/個 (每包:5個)
單位
Dual/Triple Ultra Low 3 - Yes 3V 1.02V Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 5.5V 5.5 V - +85 °C
RS庫存編號 121-8484
製造零件編號TL7705ACP
HK$5.045
毎管:50 個
單位
Supply 1 - - 4.6V 4.5V Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 10V 18 V - +70 °C
RS庫存編號 900-9813
製造零件編號TPS3701DDCT
HK$23.442
/個 (每包:5個)
單位
- - - - - - Surface Mount SOT-23 6 3.05 x 1.75 x 1mm - - - +125 °C
RS庫存編號 121-6412
製造零件編號CAT811STBI-GT3
HK$1.253
個 (在毎卷:3000)
單位
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庫存編號 168-6322
製造零件編號STM6823TWY6F
HK$5.292
個 (在毎卷:3000)
單位
Microprocessor Voltage Monitor 1 Yes Yes 3.11V 3.04V Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm - 5.5 V - +85 °C
RS庫存編號 789-3925
製造零件編號CAT811STBI-GT3
HK$3.15
/個 (每包:20個)
單位
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庫存編號 806-7966
製造零件編號AD8280WASTZ
HK$70.65
單位
Battery Backup Monitor - - - 4.6V 3.6V Surface Mount LQFP 48 7.2 x 7.2 x 1.45mm - 30 V - +105 °C
RS庫存編號 806-0760
製造零件編號NCP302HSN27T1G
HK$3.698
Each (On a Tape of 25)
單位
Voltage Detector 1 - - 2.781V 2.619V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C