Maxim Integrated MAX6832FXRD3 Microprocessor Reset Circuit

The MAX6832FXRD3 is a highly reliable, low-power microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a +3V to +3.6V power supply voltage.

This compact supervisory IC is tailored to maintain system integrity by monitoring the power supply voltage levels. In the event of a voltage drop below a preset threshold, the MAX6832FXRD3 asserts a reset signal to the µP, effectively resetting the system to prevent erroneous operation. The reset signal remains asserted for a minimum timeout period after V_CC has risen above the reset threshold level, ensuring the system has adequate time to stabilize.

One of the key features of the MAX6832FXRD3 is its factory-trimmed reset threshold options that cater to a wide range of applications. The device is available in a compact, 5-pin SOT23 package, making it ideal for space-constrained applications. Its low supply current of 1.6µA (typical) is particularly beneficial for portable and battery-operated devices, where power conservation is crucial.

Moreover, the MAX6832FXRD3 offers an active-low, push-pull reset output, which allows for a direct interface with a microprocessor without the need for external transistors. This feature simplifies circuit design and reduces component count, contributing to a more efficient and cost-effective system layout.

Key specifications of the MAX6832FXRD3 include:

• Voltage monitoring range: +3V to +3.6V
• Factory-set reset threshold voltages
• Low power consumption: 1.6µA typical
• Minimum reset timeout period: 140ms
• Operating temperature range: -40°C to +125°C
• Compact 5-pin SOT23 package

Overall, the MAX6832FXRD3 is a robust solution for system designers looking to enhance the reliability of their µP systems without incurring significant power or space penalties. Its ease of integration and strong feature set make it a popular choice for a broad range of applications, including portable devices, computers, controllers, and intelligent instruments.