Maxim Integrated MAX6423US23 Microprocessor Reset Circuit

The Maxim Integrated MAX6423US23 is a compact, highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. This device is specifically engineered to monitor power supplies in µP and digital systems, providing a quick and robust response to ensure that the system's microprocessor is reset to a known state during a power failure or when the voltage drops below a predetermined threshold.

Key features of the MAX6423US23 include a precise factory-set reset threshold voltage of 2.32V, which provides accurate monitoring of the VCC. The reset output is active-low, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, ensuring adequate time for the µP to initialize. This reset timeout period helps to avoid system errors during power-up, power-down, or brownout conditions.

The device is available in a small, space-saving SOT-143 package, making it ideal for portable and space-constrained applications. Its low supply current of only 1.2µA (typical) makes it suitable for battery-operated devices where power efficiency is crucial. The MAX6423US23 operates over a wide temperature range of -40°C to +125°C, accommodating diverse environmental conditions and making it versatile for various industrial, automotive, and consumer applications.

Additional features of the MAX6423US23 include the ability to assert a reset signal upon detection of a manual reset input, which can be triggered by an external push-button or other input sources. This manual reset capability provides an extra level of control for system designers and operators.

The robust design of the MAX6423US23 ensures that it can handle transient conditions and provide a stable and reliable performance over its entire operating range. With its combination of precision voltage monitoring, low power consumption, and compact form factor, the MAX6423US23 is an excellent choice for safeguarding µP systems against power supply uncertainties and ensuring consistent operation.

Overall, the MAX6423US23 from Maxim Integrated is a trusted solution for system designers who require a reliable reset mechanism for their µP systems, ensuring that devices operate as intended, even in the face of power instability.