Maxim Integrated MAX6343ZUT+T Microprocessor Reset Circuit

The MAX6343ZUT+T is a compact, high-quality microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a single +3V to +3.6V power-supply voltage.

This device is specifically engineered to maintain system integrity by monitoring the power supply voltage. It asserts a reset signal whenever the VCC supply voltage declines below the factory-set reset threshold level. The reset signal remains asserted for a preset timeout period after VCC has risen above the reset threshold, ensuring the system has stabilized before the processor is allowed to run.

The MAX6343ZUT+T features an active-low, push-pull reset output, which provides a robust reset signal that remains valid even when VCC is down to 1V. This feature is particularly useful in low-power applications where the supply voltage may sag momentarily, such as during battery changes or when significant load currents are applied.

With its tiny SOT23-6 package, the MAX6343ZUT+T is an excellent choice for space-constrained applications. Its small size does not compromise its performance, as it includes immunity to short VCC transients and a low supply current of 5µA (typical), making it ideal for portable and battery-powered equipment.

Additional features of the Maxim Integrated MAX6343ZUT+T include:

• Precision factory-set VCC reset thresholds
• Immunity to short duration VCC transients
• Low, 5µA supply current
• Active-low, push-pull RESET output
• Guaranteed RESET valid to VCC = 1.0V
• 100ms min reset pulse width
• Operating temperature range from -40°C to +125°C
• No external components required

Whether you're designing a microcontroller-based system, a data storage device, or portable consumer electronics, the MAX6343ZUT+T offers a reliable and straightforward solution for your power monitoring and reset needs, ensuring that your system operates reliably under varying power conditions.

By integrating the MAX6343ZUT+T into your design, you can count on Maxim Integrated's reputation for high-quality, high-performance integrated circuits to help maintain the integrity and stability of your electronic systems.