Maxim Integrated MAX6414UK44+T Microprocessor Reset Circuit

The MAX6414UK44+T from Maxim Integrated is a highly compact, low-power 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 for system monitoring.

This supervisory circuit ensures that the µP resets properly during power-up, power-down, and brown-out conditions. With a factory-trimmed reset threshold voltage of 4.4V, the MAX6414UK44+T is tailored for applications that operate at 5V supply voltages. The reset output is guaranteed to be in the correct logic state for VCC down to 1V, making it suitable for low voltage operations.

The MAX6414UK44+T features an active-low RESET output, which remains asserted for a minimum timeout period of 140ms after VCC has risen above the reset threshold level. This ensures that the system has sufficient time to stabilize before the processor is allowed to run. The device operates over a wide temperature range of -40°C to +125°C, making it versatile for various operating environments.

In terms of packaging, the MAX6414UK44+T comes in a space-saving 5-pin SOT23 package, which is ideal for space-constrained applications. The small footprint of this package allows for efficient use of board space in compact system designs. Additionally, it is available in tape and reel form, denoted by the suffix +T, which facilitates automated assembly processes, making it suitable for high-volume production.

Key features of the MAX6414UK44+T include:

• Precision factory-set VCC reset thresholds
• Low 1.2µA supply current makes it suitable for battery-operated devices
• Immune to short VCC transients
• 140ms (min) reset timeout period
• Wide operating temperature range
• Small SOT23 packaging for space-saving applications

The MAX6414UK44+T is an ideal choice for portable devices, computers, controllers, intelligent instruments, and critical µP and µC power monitoring, where reliable reset functionality is crucial for proper operation.