S-1009N18I-N4T1U

Introduction

The S-1009N18I-N4T1U is a type of PMIC - Supervisors, Multi-Function Supervisory Circuit specifically designed to provide microprocessor reset or power supply monitoring functions. This supervisor has features such as a POK and watch dog timer with a potentiometer, setting a range of parameters. This supervisor is composed of several different discrete devices such as economical digital power management, user adjustable voltage threshold monitor and versatile interrupt generation capability suitable for a variety of applications. This supervisor offers flexibility in design, allowing it to be used in a variety of different applications.

Application Field and Working Principle

Application Field

The S-1009N18I-N4T1U is widely used in high-end embedded products, particularly those requiring a reset monitor and single device to reduce inventory costs. It provides efficient protection for systems that require high reliability and performance. This supervisor is used in application fields including medical and industrial automation, electronic gaming equipments, automotive electronics, networking and communications, home appliances, computer and audio/video equipment, military and aerospace products.

Apart from being used in these applications, the S-1009N18I-N4T1U can also be used as a secondary supervisor in software applications, by monitoring the status of the system frequently and clearing RAM periodically, as well as other functions.

Working Principle

The S-1009N18I-N4T1U is a four-purpose, single-device supervisor which provides reliable operation independent of the operating rapid power supply rise times. This supervisor comprises several features and functions, each of them playing an important role in providing efficient protection for systems that require high reliability and performance. These features and functions are reset monitoring, over-voltage monitoring, low voltage monitoring and window voltage monitoring.

The reset monitoring enables the system to reset power supplies if the power supply voltage falls outside of the specified range. This supervisor provides an adjustable reset timeout period, allowing the system to enter into safe mode if the voltage remains outside of the specified range, thus providing protection against over-voltage or short circuit conditions. The over-voltage monitoring function operates in conjunction with the reset timeout period and monitors the system voltage. If the voltage exceeds the preset voltage threshold, the supervisor will timeout and reset the power supply, thus preventing damage from over-voltaging.

The low-voltage monitoring feature continuously monitors the system voltage. As soon as the voltage falls below a predetermined value, the supervisor will be triggered and will reset the power supply to safe mode. This is especially useful for systems that experience sudden power outages or brown-outs.

The window voltage monitoring feature operates in conjunction with the reset timeout period and monitors the system voltage. If the voltage falls below or rises above a preset window, the supervisor will timeout and reset the power supply.

Conclusion

The S-1009N18I-N4T1U is a versatile, efficient and reliable PMIC - Supervisors, Multi-Function Supervisory Circuit, designed to provide microprocessor reset or power supply monitoring functions, as well as other features. This supervisor can be used in a variety of applications, allowing for efficient protection against over-voltages, short circuits and sudden power outages or brownouts. This supervisor is suitable for high-end embedded products, particularly those needing a reset monitor, and for reducing inventory costs.