Maxim Integrated MAX823SEXK-T Microprocessor Supervisory Circuit

The Maxim Integrated MAX823SEXK-T 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 system monitoring applications.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX823SEXK-T features a precision voltage monitor with a factory-set reset threshold voltage. When V<sub>CC falls below the reset threshold, the reset output is asserted to prevent the µP from executing erroneous instructions.

Key features of the MAX823SEXK-T include:

• Reset Output: The device has an active-low reset output, which remains asserted for a minimum reset timeout period after V<sub>CC rises above the reset threshold. This ensures the µP has sufficient time to stabilize during power-up.
• Low Power Consumption: With a low supply current of only 1µA, this supervisory circuit is ideal for power-sensitive applications.
• High Accuracy: The reset threshold is factory-set with high precision, ensuring reliable monitoring without the need for external adjustments.
• Small Form Factor: The MAX823SEXK-T comes in a compact SOT23-5 package, making it suitable for space-constrained applications.
• Wide Operating Voltage Range: This device operates over a wide voltage range, accommodating various applications and power supply configurations.
• Temperature Range: It is designed to function over an extended industrial temperature range, making it suitable for harsh environments.

Applications for the MAX823SEXK-T include portable devices, computers, controllers, and intelligent instruments where reliable system operation is critical. Its small size and precision features make it an excellent choice for system designers looking to enhance the reliability and performance of their products.

Overall, the Maxim Integrated MAX823SEXK-T is a robust and versatile supervisory solution that offers a mix of features tailored to ensure the stable operation of microprocessor-based systems across a variety of applications.