DS1815R-20-U+

Supervisors Overview

The DS1815R-20-U+ is a voltage supervisory circuit from the EconoReset series, manufactured by Analog Devices Inc./Maxim Integrated. It monitors a single input channel with a fixed threshold voltage of 3.3V. The device features a push-pull output that is active low and provides a minimum reset timeout of 100ms. It operates within a supply voltage range up to 5.5V and supports an operating temperature range from -40°C to +85°C. The component is housed in a SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Integrated power-fail detection capability for monitoring supply integrity
• Push-pull output driver providing active-low reset signal
• Fixed threshold voltage supervision for standard logic levels

Supervisors Applications

• Embedded system power management
• Microcontroller reset circuits
• Portable electronic devices

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm package marking and datasheet revision compatibility with existing designs. Check for RoHS compliance documentation as required by regional regulations. Validate pinout alignment during PCB re-layout or replacement sourcing.

Supervisors Selection Notes

Select this component when a fixed 3.3V threshold is required for single-channel supervision. The push-pull output eliminates the need for external pull-up resistors compared to open-drain alternatives. Ensure the application environment remains within the specified industrial temperature range for reliable operation.

Supervisors Part Context

This part belongs to the DS1815 family of simple reset supervisors designed for cost-sensitive applications. It provides essential power-on reset functionality without complex configuration requirements. The SOT-23-3 package allows for compact board space utilization in portable and embedded designs.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.