ON Semiconductor MAX803SQ308D2T1G Microprocessor Reset Circuit

The ON Semiconductor MAX803SQ308D2T1G is a specialized microprocessor (µP) supervisory circuit designed to monitor the power supplies in digital systems. It provides a crucial function in ensuring system reliability by triggering a reset to the microprocessor during power-up, power-down, and brownout conditions. The compact SOT-323 package makes it ideal for space-constrained applications.

Key Features:

• Precision Monitoring: This device features a precision voltage monitor that keeps a close eye on the system voltage levels, ensuring that the connected microprocessor is reset if the supply voltage drops below a preset threshold, which for this model is 3.08V.
• Low Power Consumption: Designed for power-sensitive applications, the MAX803 consumes very low power, which helps to extend battery life in portable devices.
• Manual Reset Input: An additional feature of this device is the manual reset input that allows for a reset to be triggered externally, providing designers with added flexibility and control over their system.
• Reset Timeout: After the supply voltage returns to an acceptable level, the MAX803SQ308D2T1G maintains the reset output in the active condition for a specified period (typically 140ms minimum) to allow the system power to stabilize.
• High Threshold Accuracy: The reset threshold accuracy is maintained at ±2.5% over the entire temperature range, ensuring reliable operation under varying conditions.
• Temperature Range: It operates over a wide temperature range from -40°C to +85°C, suitable for industrial applications.
• RoHS Compliant: The device is RoHS compliant, meaning it meets the European Union's restrictions on the use of certain hazardous substances in electrical and electronic equipment.

Applications:

The MAX803SQ308D2T1G is versatile and can be used in a variety of applications where reliable system operation is critical. It is particularly useful in:

• Portable/Battery-Powered Equipment
• Computers and Controllers
• Embedded Systems
• Data Storage Equipment
• Industrial/Telecommunication Systems

In summary, the ON Semiconductor MAX803SQ308D2T1G is a robust and reliable solution for system reset management, ensuring that digital systems remain operational and safe from unexpected power disturbances. Its precision and low-power operation make it an excellent choice for a wide range of electronic applications.