Maxim Integrated MAX823REUK+T Microprocessor Supervisory Circuit

The MAX823REUK+T is a compact, highly precise 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 systems with a single 3.3V power supply rail.

This supervisory circuit ensures that the µP and its peripherals are reset properly during power-up, power-down, or brown-out conditions. The MAX823REUK+T features a factory-trimmed reset threshold suitable for operation with a variety of microprocessors, offering compatibility with a multitude of digital systems.

Key features of the MAX823REUK+T include:

• Reset Output: This device includes an active-low reset output, which remains asserted for a minimum timeout period after VCC has risen above the reset threshold level. This ensures that the system has sufficient time to stabilize before the processor starts operating.
• Low Power Consumption: With a low supply current of only 3µA (typical), the MAX823REUK+T is ideal for power-sensitive applications.
• Compact SOT-23 Packaging: Housed in a small 5-pin SOT-23 package, the MAX823REUK+T saves valuable board space, making it suitable for use in space-constrained applications.
• Manual Reset Capability: The device also features a manual reset input that allows for a system reset to be initiated with an external pushbutton or logic signal.
• Immunity to Short VCC Transients: The MAX823REUK+T is designed to ignore brief glitches on the VCC line, preventing unnecessary resets due to transient disturbances.

This supervisory circuit is commonly used in applications such as computers, controllers, intelligent instruments, portable/battery-powered equipment, and critical µP power monitoring. With its precision monitoring capabilities and robust feature set, the MAX823REUK+T from Maxim Integrated is an essential component for ensuring the reliable operation of digital systems that require consistent monitoring and control of the power supply voltage.

By integrating this device into your system, you can achieve a higher level of security and stability, safeguarding your critical processes and data from the adverse effects of power supply inconsistencies.