Maxim Integrated's MAX6323CUT29+ Microprocessor Reset Circuit

The MAX6323CUT29+ is a highly reliable and precise microprocessor (μP) supervisory circuit designed by Maxim Integrated 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 that require voltage monitoring. This makes the MAX6323CUT29+ an ideal choice for a wide range of applications, including computers, controllers, intelligent instruments, and portable/battery-powered equipment.

This device performs a critical function by asserting a reset signal whenever the V_CC supply voltage falls below a preset threshold, ensuring that the μP powers up in a known state. The reset signal remains asserted for a period after V_CC has risen above the reset threshold level, providing ample time for the system to stabilize before the processor begins operation. This timeout period is known as the reset timeout period.

Featuring a factory-set reset threshold voltage of 2.93V, the MAX6323CUT29+ ensures compatibility with 3V-powered systems. Its low supply current of 1.2μA (typical) makes it particularly suitable for use in portable equipment where extending battery life is of paramount importance.

The reset output stage of the MAX6323CUT29+ is push-pull, which eliminates the need for an external pull-up resistor and further simplifies system design. The device comes in a compact, 6-pin SOT-23 package, making it an excellent choice for space-constrained applications.

Key features of the MAX6323CUT29+ include:

• Factory-set reset threshold voltage: 2.93V
• Low supply current: 1.2μA (typ.)
• Reset timeout period: 140ms (min.)
• Push-pull reset output
• Compact 6-pin SOT-23 package
• Operating temperature range: -40°C to +85°C
• No external components required

With its precision voltage monitoring and low power consumption, the MAX6323CUT29+ from Maxim Integrated is an excellent choice for designers looking to enhance system reliability and extend battery life in their digital and microprocessor-based systems.