Maxim Integrated MAX809ZEXR+T Microprocessor Reset Circuit

The MAX809ZEXR+T from Maxim Integrated is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of protection for your microprocessor by ensuring that the system's power-on reset remains asserted until the supply voltage reaches a stable and acceptable level. This device is an essential component for any system that requires reliable operation and protection against unpredictable power supply conditions.

With a factory-trimmed reset threshold voltage, the MAX809ZEXR+T guarantees accurate monitoring of the VCC supply voltage. This precision ensures that the reset output is active whenever the VCC supply falls below the minimum voltage threshold, effectively preventing the microprocessor from operating under conditions that could lead to unpredictable behavior or damage.

The reset output of the MAX809ZEXR+T remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This built-in delay provides sufficient time for the power supply and microprocessor to stabilize before the system begins operation, which is crucial for avoiding system errors during power-up.

Designed with versatility in mind, the MAX809ZEXR+T is suitable for a wide range of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring. Its small size, offered in a SOT-23 package, makes it ideal for space-constrained applications while still delivering the robust functionality expected from Maxim Integrated products.

This device operates over a wide temperature range, making it suitable for use in environments with varying temperature conditions. Additionally, the low power consumption and high reliability of the MAX809ZEXR+T make it an excellent choice for portable and battery-operated applications where power efficiency is paramount.

In summary, the Maxim Integrated MAX809ZEXR+T is an indispensable component that delivers reliable and precise voltage monitoring, ensuring that your digital systems maintain optimal functionality and protection. Its small footprint, ease of integration, and robust feature set make it a top choice for designers looking to enhance system stability and longevity.