Maxim Integrated MAX6418UK29+T Microprocessor Reset Circuit

The Maxim Integrated MAX6418UK29+T is a highly compact, low-power 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 in systems with a 2.93V power supply voltage.

This supervisory circuit ensures that the µP starts up in a known state by asserting a reset signal whenever the VCC supply voltage falls below the reset threshold. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold, providing a stable system reset. The reset threshold for the MAX6418UK29+T is precisely set at 2.93V, making it suitable for applications that operate around this voltage level.

The device features a low supply current of only 1.2µA, which is ideal for power-sensitive applications. Its small size is due to the SOT23-5 package, which occupies minimal space on a PCB and is perfect for portable or space-constrained electronic systems. Additionally, the MAX6418UK29+T operates over a wide temperature range of -40°C to +125°C, making it versatile for various environmental conditions.

Key features of the MAX6418UK29+T include:

• Factory-set reset threshold voltage of 2.93V
• Low supply current of 1.2µA, conserving system power
• Guaranteed reset valid to VCC = 1V
• Programmable reset timeout period with external capacitor
• Immunity to short VCC transients
• No external components required
• Compact SOT23-5 package

This reset circuit is commonly used in portable devices, computers, controllers, intelligent instruments, and critical µP and µC power monitoring. The MAX6418UK29+T's robust feature set ensures reliable operation of electronic systems by providing a stable reset signal during power-up, power-down, and brown-out conditions.

Overall, the Maxim Integrated MAX6418UK29+T is an excellent choice for designers looking for a simple, efficient, and reliable solution to safeguard their digital systems from improper operation due to fluctuations in the power supply.