Maxim Integrated MAX6418EUK26 Microprocessor Reset Circuit

The Maxim Integrated MAX6418EUK26 is a compact, highly reliable 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 2.63V powered circuits.

This device performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The reset output is available in either an active-low push-pull or an active-low open-drain configuration. The MAX6418EUK26 features a factory-set reset threshold voltage, making it convenient for a wide range of applications without the need for external adjustments.

The compact SOT23 package makes the MAX6418EUK26 an ideal choice for use in space-constrained applications. Despite its small size, this reset circuit does not compromise on performance, offering a low supply current of 1.5µA (typ) and a wide operating temperature range of -40°C to +125°C, which ensures reliable operation under extreme conditions.

Key features of the MAX6418EUK26 include:

• Precision factory-set VCC reset thresholds
• 140ms (min) reset timeout period
• Low 1.5µA supply current
• Immune to short VCC transients
• Available in active-low push-pull or active-low open-drain reset output
• Compact SOT23-5 package
• Wide operating temperature range: -40°C to +125°C

This device is commonly used in portable/battery-powered equipment, computers, controllers, intelligent instruments, critical µP and µC power monitoring, and other applications where precise monitoring of system health is required.

Maxim Integrated's commitment to quality and reliability is evident in the MAX6418EUK26, making it a preferred choice for designers looking to enhance system stability and protection without incurring significant space or power penalties.