Maxim Integrated's MAX6342SUT+T Microprocessor Reset Circuit

The MAX6342SUT+T is a highly reliable and compact microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. This device ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The MAX6342SUT+T is an essential component for systems that require a high degree of operational stability and accuracy.

With its small SOT23-6 package, the MAX6342SUT+T is an ideal choice for space-constrained applications. The device operates over a wide voltage range, making it suitable for use with a variety of power supplies. It features a factory-trimmed reset threshold voltage, which allows for precise monitoring of the VCC supply voltage without the need for external components.

The MAX6342SUT+T boasts a low supply current of only 1.2µA, making it an energy-efficient solution for portable and battery-powered devices. Its reset output is guaranteed to be in the correct state for VCC down to 1.1V, ensuring reliable operation even during low voltage conditions.

This supervisory circuit also includes a manual reset input, which provides a means to initiate a system reset externally. The reset signal remains asserted for a minimum of 140ms after VCC has risen above the reset threshold or after the manual reset input has been deasserted, ensuring that the µP has sufficient time to stabilize.

Key features of the MAX6342SUT+T include:

• Factory-trimmed VCC reset threshold for accuracy
• Low power consumption with 1.2µA supply current
• Guaranteed reset valid to VCC = 1.1V
• Minimum 140ms reset pulse width
• Manual reset input for external override
• Immune to short VCC transients
• High temperature operation range from -40°C to +125°C

The MAX6342SUT+T is an excellent choice for managing system integrity across various applications, including portable devices, computers, controllers, and intelligent instruments. Its robust feature set ensures that it can meet the demands of complex digital systems where performance and reliability are critical.