Maxim Integrated MAX823YEXK+T Microprocessor Supervisory Circuit

The MAX823YEXK+T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with +2.5V, +3V, +3.3V, and +5V-powered circuits.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX823YEXK+T features a manual reset input that allows the user to trigger a reset. A reset signal is asserted when the VCC supply voltage drops below the factory-set reset threshold voltage. The reset output remains asserted for the reset timeout period after VCC rises above the reset threshold and the manual reset input is deasserted.

The device comes in a compact 5-pin SC70 package, making it ideal for space-constrained applications. Its low supply current of 4µA (typical) makes it suitable for portable equipment where power conservation is critical. The MAX823YEXK+T operates over a wide temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments.

Key features of the MAX823YEXK+T include:

• Factory-Set Reset Threshold Voltages for +2.5V, +3V, +3.3V, and +5V Supplies
• Reset Timeout Period of 140ms (min)
• Manual Reset Input
• Low Supply Current of 4µA (typical)
• Operational Temperature Range: -40°C to +125°C
• Compact 5-Pin SC70 Package

With its precision voltage monitoring and versatile features, the MAX823YEXK+T is an excellent choice for a variety of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-operated equipment.

Maxim Integrated's commitment to quality ensures that the MAX823YEXK+T supervisory circuit is a reliable and cost-effective solution for system designers looking to enhance the stability and robustness of their power management systems.