Maxim Integrated DS1818-5+T&R Product Overview

The DS1818-5+T&R is a versatile and reliable microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated, a company renowned for its high-quality and innovative semiconductor products. This component is engineered to monitor the power supply and temperature of µP systems, ensuring optimal operation and preventing system failure due to unforeseen power fluctuations or overheating.

The DS1818-5+T&R supervisory circuit comes with a preset threshold voltage of 4.63V, making it suitable for 5V power supply applications. It provides a critical hardware monitoring solution by asserting a reset signal to the µP whenever the VCC supply voltage falls below the threshold. This reset signal maintains the µP in a reset state for a minimum of 150ms after VCC has risen above the reset threshold, ensuring the system has stabilized before operation continues.

This device is available in a compact SOT-23 package and is supplied in tape and reel (T&R) format, which is ideal for automated assembly processes, enhancing manufacturing efficiency for high-volume production. The DS1818-5+T&R is designed for easy integration into a broad range of applications, including embedded systems, computers, and other electronic devices that require reliable power-on reset functionality.

Key features of the DS1818-5+T&R include:

• Power supply monitoring at 4.63V preset threshold
• Minimum 150ms reset pulse width
• Low supply current of 20µA (typical), which is beneficial for power-sensitive applications
• Guaranteed reset valid to VCC = 1V, ensuring reliable operation under low voltage conditions
• Immunity to short VCC transients, preventing false resets
• Compact SOT-23 package suitable for space-constrained applications

The DS1818-5+T&R is a testament to Maxim Integrated's commitment to providing components that enhance the reliability and performance of electronic systems. Its specialized functionality and ease of use make it an essential component for designers looking to safeguard their systems against power and temperature anomalies.