The MXD1818XR22 from Maxim Integrated is a compact, high-precision microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function by ensuring that the µP and its peripherals are reset properly during power-up, power-down, or brown-out conditions. This reset circuit is particularly suitable for portable, battery-operated applications due to its low power consumption and small footprint.

Key Features

• Power Supply Monitoring: Precisely monitors 2.2V power supplies, maintaining system integrity.
• Reset Output: The active-low RESET output signal ensures that the connected µP and other devices are held in the reset state until the system voltage stabilizes.
• Low Power Consumption: With its low quiescent current, it is an ideal choice for power-sensitive applications.
• Manual Reset Input: A manual reset input allows for an external trigger to initiate a system reset, providing additional system control.
• High Accuracy: Features a reset threshold accuracy of ±1.5%, which is critical for reliable operation.
• Compact Package: Available in a small SOT23 package, making it convenient for space-constrained designs.

Applications

The MXD1818XR22 is versatile and can be used in a variety of applications where reliable voltage monitoring is required. It is especially well-suited for:

• Portable/Battery-Powered Equipment
• Computers and Controllers
• Embedded Systems
• Data Storage
• Automotive Systems
• Medical Devices

Technical Specifications

With an operating temperature range of -40°C to +125°C and a threshold voltage of 2.2V, the MXD1818XR22 ensures functionality across a wide range of environmental conditions. The device's active-low RESET output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, providing ample time for the system to stabilize.

For developers and engineers looking for a reliable reset circuit to safeguard their digital systems, the MXD1818XR22 from Maxim Integrated is an excellent choice that combines precision, low power, and compact design.