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Supply Voltage Supervisor (SVS, or supply voltage supervisory circuit) circuits are used to monitor the supply voltage to embedded and electronic systems for under voltage conditions. If an under voltage condition is detected then the supervisory circuit will reset the controller and keep it in that state as long as the under voltage condition persists. This type of reset is called brown out reset (BOR). In many modern day microcontrollers, Brown Out Reset protection is used to prevent erratic behavior or damage due to unstable supply voltages.
Supply Voltage Supervisor (SVS, or supply voltage supervisory circuit) circuits are used to monitor the supply voltage to embedded and electronic systems for under voltage conditions. If an under voltage condition is detected then the supervisory circuit will reset the controller and keep it in that state as long as the under voltage condition persists. This type of reset is called brown out reset (BOR). In many modern day microcontrollers, Brown Out Reset protection is used to prevent erratic behavior or damage due to unstable supply voltages.
Application
Supply voltage supervisors are used to protect circuitry such as MPUs,DRAM
Dynamic random-access memory (dynamic RAM or DRAM) is a type of random-access semiconductor memory that stores each bit of data in a memory cell, usually consisting of a tiny capacitor and a transistor, both typically based on metal-oxid ...
, and other devices that are easily damaged by high voltages or will operate incorrectly at low voltages. They can be specialized ICs, but are often found integrated into a microcontroller on the same chip.
Features and functions that can be included with voltage supervisors are:
* Watchdog timer
* Battery switch-over (UPS
UPS or ups may refer to:
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* United Parcel Service, an American shipping company
** The UPS Store, UPS subsidiary
** UPS Airlines, UPS subsidiary
* Underground Press Syndicate, later ''Alternative Press Syndicate'' or ...
)
* Window comparator circuit (window detector
A window detector circuit, also called window comparator circuit or dual edge limit detector circuits is used to determine whether an unknown input is between two precise reference threshold voltages. It employs two comparators to detect over-volt ...
)
References
{{reflist Electronic circuits