Maxim Integrated Product Overview: MAX6348UR46

The MAX6348UR46 is a precision, low-power microprocessor (µP) supervisory circuit from Maxim Integrated designed to monitor power supplies in digital systems. It provides a significant layer of protection by ensuring that the µP and its associated hardware are reset to a known, stable state upon power-up or during a power supply failure.

This supervisory circuit operates over a wide voltage range and features a factory-trimmed reset threshold level of 4.6V, making it particularly suitable for 5V-powered systems. The device is highly integrated, featuring a manual reset input, which allows for a system reset to be triggered with an external switch or logic signal, offering additional control and safety for system maintenance or emergency situations.

The MAX6348UR46 comes in a compact, space-saving SOT23 package, which is ideal for space-constrained applications. Its low power consumption, with a quiescent current of typically 1.2µA, makes it an excellent choice for portable and battery-operated equipment where power efficiency is a critical concern.

Key features of the MAX6348UR46 include:

• Factory-set reset threshold of 4.6V suitable for 5V systems
• Low power consumption with a typical quiescent current of 1.2µA
• Compact SOT23 packaging for space-saving
• Manual reset input for additional system control
• Immune to short V<sub>CC transients
• Reset output stage options (push-pull or open-drain)
• Wide operating temperature range

The device is designed to maintain system integrity by asserting a reset signal whenever the V<sub>CC supply voltage falls below the reset threshold. The reset output remains asserted for a period after V<sub>CC has risen above the reset threshold, ensuring that the system has sufficient time to stabilize.

The MAX6348UR46 is an ideal choice for microprocessor systems, computers, controllers, and intelligent instruments, where reliable operation is paramount. By integrating this supervisory circuit into a design, developers can enhance system reliability and protect against the potentially damaging effects of power supply inconsistencies.