Maxim Integrated's MAX6343TUT+T - Microprocessor Supervisory Circuit

The MAX6343TUT+T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed 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 3.3V power supply.

This supervisory circuit ensures that the µP is fully reset during power-up, power-down, and brownout conditions. The MAX6343TUT+T asserts a reset signal whenever the V<sub>CC supply voltage declines below the factory-set reset threshold, keeping it asserted for at least 140ms after V<sub>CC has risen above the reset threshold. This guarantees that the µP starts up in a known state.

The device comes in a small, 6-pin SOT23 package, making it ideal for space-constrained applications. It has an operating temperature range of -40°C to +85°C, which suits a wide variety of environments and applications. The MAX6343TUT+T features a low supply current of 1.2µA, making it an energy-efficient choice for portable and battery-operated equipment.

Key features of the MAX6343TUT+T include:

• Precision factory-set V<sub>CC reset thresholds
• 140ms minimum power-on reset
• Low supply current of 1.2µA
• Guaranteed reset valid to V<sub>CC = 1V
• No external components required
• Power supply transient immunity
• Compact 6-pin SOT23 packaging

Applications for this supervisory circuit include portable/battery-powered equipment, computers, controllers, intelligent instruments, critical µP and µC power monitoring. With its robust feature set, the MAX6343TUT+T provides a compact, efficient, and reliable solution for system monitoring and power management, ensuring the stable operation of critical electronic systems.