Maxim Integrated MAX6421US29+T Microprocessor Supervisory Circuit

The MAX6421US29+T is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected shutdowns. Manufactured by Maxim Integrated, a leader in analog and mixed-signal engineering, this component is an essential piece for applications requiring precise voltage monitoring and processor control.

This supervisory circuit is engineered to monitor the supply voltage of a microprocessor system, ensuring that the voltage remains within a specified threshold. It provides a reset output during power-up, power-down, and brownout conditions. The reset signal is maintained for a minimum of 140ms after the supply voltage exceeds the reset threshold, ensuring that the µP has adequate time to initialize and stabilize during power-up.

Featuring a factory-set reset threshold voltage of 2.93V, the MAX6421US29+T is suitable for systems that operate with 3.3V power supplies. Its low supply current of 1.2µA (typical) makes it an excellent choice for power-sensitive applications. The device operates over a wide temperature range of -40°C to +125°C, catering to industrial and automotive applications that demand high reliability under extreme conditions.

The MAX6421US29+T comes in a compact SOT-143 package, making it ideal for space-constrained applications. It is also available in tape and reel packaging (denoted by the suffix +T), which facilitates automated manufacturing processes.

The circuit's key features include:

• Factory-Set Reset Threshold Voltage: 2.93V
• Minimum Reset Timeout Period: 140ms
• Low Supply Current: 1.2µA (typ.)
• Wide Operating Temperature Range: -40°C to +125°C
• Compact SOT-143 Package

With its precision voltage monitoring and low power consumption, the MAX6421US29+T is an excellent choice for managing µP systems in a variety of fields, including industrial controls, automotive systems, portable devices, and more. Its robust design ensures that electronic products operate reliably and consistently, even under challenging conditions.

Maxim Integrated's commitment to quality and performance is evident in the MAX6421US29+T, making it a top selection for designers looking to enhance the resilience and efficiency of their µP-based systems.