Maxim Integrated MXD1815XR31+T Microprocessor Supervisor

The MXD1815XR31+T from Maxim Integrated is a highly precise microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial safeguard for ensuring the proper operation of microprocessors, by asserting a reset signal whenever the VCC supply voltage falls below a predetermined threshold. This particular model is tailored for applications requiring a nominal threshold voltage of 3.1V.

With its compact SOT-323 package, the MXD1815XR31+T is ideal for space-constrained applications. It is specifically engineered to deliver enhanced system reliability through its reset output feature, which remains asserted for a minimum of 140ms after VCC has risen above the reset voltage threshold. This ensures that the system has sufficient time to stabilize before the processor begins operation.

The device boasts a low supply current of only 3.5µA (typical), making it an energy-efficient solution for portable electronics. Moreover, its wide operating voltage range from 1.2V to 5.5V provides versatility, allowing it to be used in a variety of applications, from battery-powered devices to embedded systems.

Key features of the MXD1815XR31+T include:

• Factory-trimmed VCC reset threshold at 3.1V
• Low supply current of 3.5µA (typical)
• Guaranteed reset output from VCC = 1.2V to 5.5V
• Minimum 140ms reset pulse width
• Immune to short VCC transients
• Available in a small SOT-323 package

Applications for this microprocessor supervisory circuit span across various sectors, including computing systems, controllers, portable/battery-powered devices, and intelligent instruments. The MXD1815XR31+T ensures that these devices maintain their integrity and performance by providing a reliable reset signal during instances of undervoltage, thus preventing erratic operation, data corruption, or system failures.

Maxim Integrated's commitment to high-quality and reliable components is evident in the MXD1815XR31+T, making it a trusted choice for designers looking to enhance the operational stability of their digital systems.