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庫存編號 738-6297
製造零件編號MCP1317T-29LE/OT
BrandMicrochip
HK$5.552
/個 (每包:5個)
單位
- 1 Yes Yes - - - Active High, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS庫存編號 162-4891
製造零件編號TPS3828-50DBVT
HK$7.758
個 (在毎卷:250)
單位
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS庫存編號 165-3363
製造零件編號MCP1317T-29LE/OT
BrandMicrochip
HK$4.233
個 (在毎卷:3000)
單位
- 1 Yes Yes - - - Active High, Push-Pull 2240ms Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm 2.97V
RS庫存編號 517-1141
製造零件編號TPS3828-50DBVT
HK$11.722
/個 (每包:5個)
單位
- 1 Yes Yes - - - Open Drain - Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 4.64V
RS庫存編號 662-4227
製造零件編號TPS3809K33DBVT
HK$6.644
/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 -
RS庫存編號 121-9204
製造零件編號TPS3809K33DBVT
HK$4.928
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 -
RS庫存編號 686-1561
製造零件編號STM6824RWY6F
HK$7.756
/個 (每包:5個)
單位
- 1 Yes - - - - Active High, Active Low, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 2.69V
RS庫存編號 169-0502
製造零件編號BD4842G-TR
BrandROHM
HK$1.303
個 (在毎卷:3000)
單位
Open Drain Voltage Detector 1 - - 4.263V - 4.137V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS庫存編號 700-3104
製造零件編號BD4842G-TR
BrandROHM
HK$3.265
/個 (每包:20個)
單位
Open Drain Voltage Detector 1 - - 4.263V - 4.137V - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 6V
RS庫存編號 168-6347
製造零件編號STM6824RWY6F
HK$3.577
個 (在毎卷:3000)
單位
- 1 Yes - - - - Active High, Active Low, Push-Pull 280ms Surface Mount SOT-23 5 2.9 x 1.6 x 1.15mm 2.69V
RS庫存編號 662-3387
製造零件編號TPS3813I50DBVT
HK$16.48
/個 (每包:5個)
單位
- 1 Yes - - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 4.65V
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
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
RS庫存編號 121-8484
製造零件編號TL7705ACP
HK$5.469
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
RS庫存編號 124-9970
製造零件編號CAT811TTBI-GT3
HK$1.362
個 (在毎卷:3000)
單位
Microprocessor Power Supply Supervisor 1 - Yes 3.15V - 3V - - Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V
RS庫存編號 121-6412
製造零件編號CAT811STBI-GT3
HK$1.441
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
RS庫存編號 808-0158
製造零件編號NCP303LSN30T1G
HK$2.575
Each (On a Tape of 100)
單位
Voltage Monitor 1 - - 4.4V - 2.59V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS庫存編號 121-8971
製造零件編號TPS3808G01DBVT
HK$9.689
個 (在毎卷:250)
單位
- 1 - Yes - - - Open Drain - Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm -
RS庫存編號 156-5701
製造零件編號LTC2912ITS8-2#TRMPBF
HK$27.522
個 (在毎卷:500)
單位
Overvoltage Monitor, Undervoltage Monitor 1 - - - - - - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 3.3V
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 -