The MAX823REXK-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies 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 device is particularly suitable for portable electronics due to its small size and low power consumption. The MAX823REXK-T ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. It achieves this by providing an active-low reset signal that remains asserted until the supply voltage reaches a stable and acceptable level for the system's operation.

Key Features:

• Precision Monitoring: With a factory-trimmed reset threshold level, the MAX823REXK-T offers precise voltage monitoring, ensuring reliable operation.
• Low Power Consumption: Designed for battery-operated devices, it consumes minimal power, thereby extending battery life.
• Manual Reset Input: A manual reset input is provided, allowing for a reset to be triggered with an external switch or logic signal.
• Compact SOT-323 Packaging: The device comes in a tiny, 5-pin SOT-323 package, making it ideal for space-constrained applications.
• Wide Operating Temperature Range: The MAX823REXK-T operates reliably over a temperature range of -40°C to +85°C, suitable for various environments.

With its built-in watchdog timer, the MAX823REXK-T also helps prevent system failures by resetting the µP if it fails to strobe within a preset timeout period. This feature is critical in systems where continuous operation is essential.

In summary, the Maxim Integrated MAX823REXK-T is a versatile, reliable, and energy-efficient solution for µP system monitoring, providing essential protection against power supply variations and ensuring the stability and integrity of the digital systems it is integrated into.