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 791-6252
製造零件編號NCP303LSN45T1G
TWD14.90
Each (On a Tape of 25)
單位
Voltage Detector 1 - - 4.59V - 4.41V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS庫存編號 162-9516
製造零件編號NCP303LSN45T1G
TWD5.40
個 (在毎卷:3000)
單位
Voltage Detector 1 - - 4.59V - 4.41V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS庫存編號 124-9970
製造零件編號CAT811TTBI-GT3
TWD5.30
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 789-3929
製造零件編號CAT811TTBI-GT3
TWD12.70
/個 (每包:20個)
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 806-5244
製造零件編號NCP300LSN20T1G
TWD18.80
/個 (每包:25個)
單位
Voltage Detector 1 - - 2.06V - 1.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS庫存編號 170-3553
製造零件編號NCP303LSN27T1G
TWD6.90
個 (在毎卷:3000)
單位
Undervoltage Detector 1 - - 2.754V - 2.646V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 163-2440
製造零件編號MAX809LTRG
TWD6.90
個 (在毎卷:3000)
單位
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.94mm 4.75V
RS庫存編號 802-4013
製造零件編號NCP303LSN27T1G
TWD16.70
Each (On a Tape of 25)
單位
Undervoltage Detector 1 - - 2.754V - 2.646V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 121-6506
製造零件編號NCP300LSN20T1G
TWD7.80
個 (在毎卷:3000)
單位
Voltage Detector 1 - - 2.06V - 1.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm -
RS庫存編號 688-8796
製造零件編號MAX809LTRG
TWD20.50
/個 (每包:2個)
單位
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.94mm 4.75V
RS庫存編號 163-2442
製造零件編號MAX809STRG
TWD4.40
個 (在毎卷:3000)
單位
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SOT-23 3 2.9 x 1.3 x 0.94mm 3V
RS庫存編號 162-9032
製造零件編號NCP303LSN11T1G
TWD7.10
個 (在毎卷:3000)
單位
Undervoltage Detector 1 - - 1.122V - 1.078V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 184-4241
製造零件編號MAX809TTRG
TWD6.50
個 (在毎卷:3000)
單位
Microprocessor Voltage Monitor 1 - - 3.11V - 3.04 - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.01mm 4.9V
RS庫存編號 163-0686
製造零件編號NCP303LSN42T1G
TWD5.70
個 (在毎卷:3000)
單位
Voltage Detector 1 - - 4.284V - 4.116V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 122-0097
製造零件編號MC34064D-5R2G
TWD11.40
個 (在毎卷:2500)
單位
Undervoltage Detector 1 - - 4.7V - 4.5V - - Surface Mount SOIC 8 5 x 4 x 1.5mm -
RS庫存編號 789-3913
製造零件編號CAT811LTBI-GT3
TWD13.20
Each (On a Tape of 20)
單位
Microprocessor Power Supply Supervisor 1 - Yes 4.75V - 4.5V - - Surface Mount SOT-143 4 3.04 x 1.4 x 1.07mm 5V
RS庫存編號 802-4243
製造零件編號NCP301HSN30T1G
TWD17.10
Each (On a Tape of 25)
單位
Ultra Low Supply Current 1 No No 3.06V - 2.94V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 145-5265
製造零件編號MAX809SQ293T1G
TWD7.60
個 (在毎卷:3000)
單位
- 1 - - - - - Active Low, Push-Pull 460ms Surface Mount SC-70 3 2.2 x 1.35 x 0.9mm 3V
RS庫存編號 162-9024
製造零件編號NCP301LSN45T1G
TWD5.70
個 (在毎卷:3000)
單位
Ultra Low Supply Current 1 - - 4.59V - 4.41V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V
RS庫存編號 163-0687
製造零件編號NCP303LSN47T1G
TWD7.10
個 (在毎卷:3000)
單位
Voltage Detector 1 - - 4.841V - 4.559V - - Surface Mount TSOP 5 3 x 1.5 x 1mm 4.9V