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 185-0825
製造零件編號BU45K432G-TL
BrandROHM
HK$4.336
/個 (每包:25個)
單位
Open Drain Voltage Detector 1 - - - - Surface Mount SSOP 3 2.9 x 1.6 x 1.1mm 4.3V 6 V - +105 °C
RS庫存編號 167-7210
製造零件編號BD4720G-TR
BrandROHM
HK$4.54
/個 (每包:20個)
單位
Bipolar Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2V 10 V - +75 °C
RS庫存編號 162-9018
製造零件編號NCP301LSN20T1G
HK$1.185
個 (在毎卷:3000)
單位
Ultra Low Supply Current 1 - - 2.04V 1.96V Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V 10 V - +125 °C
RS庫存編號 824-6248
製造零件編號TC1270ANSVCTTR
BrandMicrochip
HK$5.65
/個 (每包:20個)
單位
Precision Monitor 1 - Yes 3V 2.85V Surface Mount SOT-23 5 3.1 x 1.8 x 1.3mm - 5.5 V - +125 °C
RS庫存編號 184-8315
製造零件編號BD4850FVE-TR
BrandROHM
HK$3.523
/個 (每包:50個)
單位
Open Drain Voltage Detector 1 - - - - Surface Mount VSOF 5 1.6 x 1.2 x 0.6mm 5V 10 V - +105 °C
RS庫存編號 167-7406
製造零件編號BD45301G-TR
BrandROHM
HK$4.81
/個 (每包:20個)
單位
Open Drain Voltage Detector 1 - Yes - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 3.11V 10 V - +105 °C
RS庫存編號 188-7018
製造零件編號BD71847AMWV-E2
BrandROHM
HK$54.14
單位
- 1 Yes - - - Surface Mount UQFN56BV7070 56 7 x 7 x 0.98mm - 5.5 V - +85 °C
RS庫存編號 184-8299
製造零件編號BD4729G-TR
BrandROHM
HK$4.54
/個 (每包:50個)
單位
Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.9V 10 V - +75 °C
RS庫存編號 192-1241
製造零件編號DS1706LESA+
HK$48.915
毎管:100 個
單位
Microprocessor Reset Monitor 1 Yes Yes 3.3V 2.5V Surface Mount SOIC 8 5 x 4 x 1.5mm 5.25V 5.5 V - +85 °C
RS庫存編號 167-7646
製造零件編號BD46291G-TR
BrandROHM
HK$5.081
/個 (每包:20個)
單位
CMOS Voltage Detector 1 - Yes - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 2.9V 10 V - +105 °C
RS庫存編號 686-5780
製造零件編號SP690AEN-L
BrandMaxLinear
HK$14.10
/個 (每包:5個)
單位
Low Power Microprocessor 1 Yes - 4.75V 4.5V Surface Mount SOIC 8 4.9 x 3.9 x 1.65mm - 5.5 V - +85 °C
RS庫存編號 192-1515
製造零件編號DS1708TESA+
HK$70.51
單位
Micropower Voltage Monitor 1 - Yes 3.3V 2.5V Surface Mount SOIC 8 5 x 4 x 1.5mm 5V 5.5 V - +85 °C
RS庫存編號 162-5130
製造零件編號LP3470IM5-4.38/NOPB
HK$7.797
個 (在毎卷:1000)
單位
Tiny Power On Reset Circuit 1 - - 4.424V 4.336V Surface Mount SOT-23 5 2.92 x 1.6 x 1.02mm 5.5V 5.5 V - +85 °C
RS庫存編號 662-4879
製造零件編號TL7770-5CDW
HK$27.676
/個 (每包:5個)
單位
Dual Supply Voltage Monitor 2 - - - - Surface Mount SOIC 16 10.28 x 7.52 x 2.35mm - 18 V - +70 °C
RS庫存編號 184-8171
製造零件編號BU4840G-TR
BrandROHM
HK$3.12
/個 (每包:50個)
單位
Open Drain Voltage Detector 1 - - - - Surface Mount SSOP 5 2.9 x 1.6 x 1.1mm 4V 7 V - +125 °C
RS庫存編號 191-3386
製造零件編號MAX40200ANS+T
HK$6.052
/個 (每包:25個)
單位
Micropower 1 - - 40V - Surface Mount WLP 4 0.72 x 0.72 x 0.3mm - 5.5 V - +125 °C
RS庫存編號 145-0958
製造零件編號LTC1726ES8-5#PBF
HK$23.366
毎管:100 個
單位
Voltage Monitor 3 Yes Yes 4.769V 4.582V Surface Mount SOIC 8 5 x 3.99 x 1.5mm 5V 7 V - +85 °C
RS庫存編號 168-6391
製造零件編號STM1061N28WX6F
HK$1.349
個 (在毎卷:3000)
單位
Low Power Voltage Detector 1 - - 2.856V 2.744V Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm - 6 V - +85 °C
RS庫存編號 190-1650
製造零件編號MAX8213ACSE+
HK$67.87
單位
Voltage Monitor 5 - - - - Surface Mount SOIC 16 10.01 x 6.2 x 1.55mm 3V 11 V - +70 °C
RS庫存編號 770-9448
製造零件編號MCP112T-475E/TT
BrandMicrochip
HK$3.85
/個 (每包:15個)
單位
Microcontroller & Microprocessor Power Monitor 1 - - - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 4.746V 5.5 V - +125 °C