Maxim Integrated MAX6342SUT-T Microprocessor Reset Circuit

The Maxim Integrated MAX6342SUT-T is a compact, high-precision microprocessor (μP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V-powered circuits.

This device is particularly well-suited for portable electronics due to its small size and low power consumption. The MAX6342SUT-T comes in a 6-pin SOT-23 package, making it easy to integrate into space-constrained designs.

Key features of the MAX6342SUT-T include:

• Voltage Monitoring: It monitors the power supply voltage and keeps the microprocessor in reset until that supply voltage reaches a stable operating level. After the supply voltage becomes stable, the reset signal is kept active for a minimum of 140ms to ensure proper system reset.
• Manual Reset Input: A manual reset input is provided, allowing for a system reset to be initiated by external hardware or software events.
• Low Power Consumption: With its low supply current of only 1.2μA, the MAX6342SUT-T is ideal for battery-operated equipment.
• Factory-Set Reset Thresholds: The reset thresholds are available in a range of factory-set voltages from 2.32V to 4.63V, accommodating various system requirements without the need for external adjustments.
• Immunity to Short VCC Transients: It is immune to short-duration power supply transients, ensuring reliable operation.
• High Accuracy: The reset threshold accuracy is maintained at ±1.5% over temperature, which is critical for reliable system operation.
• Temperature Range: The operating temperature range of -40°C to +85°C allows for use in environments with extreme temperatures.

The MAX6342SUT-T is a versatile component that provides an essential function in ensuring the stable operation of microprocessor-based systems. Its integration into a design ensures that the system's μP starts in a known state every time the power is cycled, enhancing the reliability of the overall system.

Whether used in handheld devices, computers, controllers, or other digital equipment, the Maxim Integrated MAX6342SUT-T is a reliable choice for system designers looking to improve the integrity of their power supply monitoring.