MN13821SNP Integrated Circuits (ICs)

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Power supply supervisors protect circuits from unexpected power supply input conditions, such as brownouts, over-voltage, and other power supply fluctuations. The MN13821SNP supervisory electronic circuit from Panasonic-Olympic Semiconductor is a power supply supervisor circuit. It consists of a voltage supervisor and a sequential reset controller. The MN13821SNP has a very stable reset threshold and a reset output that is valid from power supply failure to power supply restore. The device has been tested to ensure that it meets a wide range of operating conditions, thus providing good industrial performance.

Applications
The MN13821SNP is suitable for use in a wide range of applications, including mobile phones, digital TVs, computers, home appliances, automotive systems and medical devices. It can be used in any design requiring an integrated voltage supervisor and sequential reset controller, such as system power on reset, power down reset, brownout reset and power fail interrupt. Additionally, the combination of the two components makes the device an ideal solution for system reset using a combination of voltage, time, and/or temperature.

Functionality
The MN13821SNP contains two basic components: a voltage supervisor and a sequential reset controller. The voltage supervisor monitors the supply voltage and will issue a reset signal when the supply voltage dips below a set threshold. The reset signal continues until the supply voltage returns to a user-defined level. The reset signal can also be initiated by a user-defined voltage and time condition determined by the designer. The supervisor can be powered from either an external supply source or an internal source, so it can be used in any application.

The sequential reset controller is designed to detect any reset issued by the voltage supervisor and delay the reset signal for a pre-defined time before the output is active. This function allows the power supply to stabilize before the reset signal is activated, and prevents the device from resetting too often due to temporary voltage drops. The time delay can be set by the user and is adjustable from 0.5 to 8 seconds. Additionally, the controller has a low power mode that allows it to maintain the reset signal in a low power state.

Features and Benefits
The MN13821SNP has several features and benefits which make it an ideal power supply supervisor for a variety of applications. The internal voltage and time monitoring circuits, low power operation, adjustable reset delay, and reset ternary outputs make it an ideal solution for a wide range of applications. Additionally, the device has a wide input voltage range from 1.2V to 7.2V, making it suitable for a variety of power supply designs. The compact 8-pin package also allows the device to be used in small and tight spaces, making it ideal for use in portable devices. Finally, the device is pin and software compatible with a wide range of products, allowing easy integration into existing designs.

Conclusion
The MN13821SNP power supply supervisor from Panasonic-Olympic Semiconductor is a reliable and high-performance solution. Its combination of voltage, time, and temperature reset conditions, along with its wide input voltage range, make it an ideal solution for a variety of applications. The compact 8-pin package and pin & software compatibility with a range of products make it easy to integrate into existing designs. Thus, the MN13821SNP is an excellent choice for any designer looking for a dependable and cost-effective solution for system reset and power supply protection.

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