S-80808CLNB-B7MT2G

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Pulse Width Modulated (PWM) supervisors, such as the S-80808CLNB-B7MT2G, are an integrated circuit (IC) designed to monitor the activity and health of microcontrollers (MCU). Generally, an MCU runs a larger control system in an embedded system — systems independent of any other computer. Pulse width modulation (PWM) supervisors ensure that these processors and MCUs are functioning correctly and reliably.

What is a PWM Supervisor?

A PWM supervisor is an IC device designed to monitor the operations of microcontrollers and processors in embedded systems. These supervisors monitor the clock signal and can detect problems such as clock jitter, short outages and unhealthy signal levels. If any of these issues occur the supervisor can initiate corrective action such as resetting the MCU, or other devices.

The S-80808CLNB-B7MT2G is an example of a PWM supervisor that can monitor signals that range from a few microseconds to several hundreds of milliseconds. It can also detect and react to any temporary outages or shifts in voltage on the system.

Features of the S-80808CLNB-B7MT2G

The S-80808CLNB-B7MT2G PWM supervisor from Semtech provides robust protection for microcontrollers and embedded systems. It features a wide range of operating temperature from -40°C to +85°C and provides selectable under-voltage detection (UV) thresholds for ensuring system reliability. Furthermore, it has an auto-key protection feature that prevents unintended system reset. It also sports an integrated low power-consumption LDO regulator that is suited for low power (~1μA) and space-limited applications.

The device features wide-operating voltage range of 2.5V to 5.5V and a fast (up to 200 us) detect time. It also provides two individually selectable voltage detect delay times that could range from operation at a few microseconds up to hundreds of milliseconds.

Working Principle

The S-80808CLNB-B7MT2G supervisor compares the MCU\'s clock signal to a reference oscillator (which is generated internally or externally) to ensure that it remains within predetermined voltage and duration thresholds. If the supervisor detects any deviations from these specifications, then it will trigger an output (reset) signal, to prevent any potential disruptions within the system.

The device also monitors for under-voltage and over-voltage conditions to prevent damage to components that may occur from prolonged exposure to these potential disturbances. It also monitors for excessive power usage in the system to prevent any excessive heat generated, which can damage the components of the system.

Application Fields

The S-80808CLNB-B7MT2G supervisor is a low power, versatile, and highly reliable device which is suitable for a variety of embedded applications. It can be used in a variety of hardware configurations such as automotive systems, digital power supplies, and ARM- based microcontrollers. It is also suitable for wearable electronics, HVAC systems and battery-powered portable applications.

The device can provide the necessary support to a variety of embedded applications that require reliable power and reset management or in-system level protection. It is robust enough to provide reliable protection to systems over wide variations in temperature, voltage, and power.

Conclusion

The S-80808CLNB-B7MT2G is a robust PWM supervisor for microcontrollers and other embedded systems. It ensures reliable and accurate monitoring of voltage and duration signals, and can detect and react to any in-system disturbances. The device offers low power usage and wide operating temperature, making it suitable for a variety of applications that require safety, reliability and accuracy.

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