DS1818R-20-U+

Supervisors Overview

The DS1818R-20-U+ is a single-channel voltage supervisor integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It belongs to the EconoReset series and provides simple reset or power-on-reset functionality. The device monitors one input voltage with a threshold of 3.3V, generating a low-active reset signal via an open-drain or open-collector output. It features a minimum reset timeout of 100ms and operates within a temperature range of -40°C to +85°C (TA). The component is housed in a surface-mount SOT-23-3 package.

Supervisors Feature Summary

• Provides reliable system reset generation for monitored voltage levels
• Features open-drain or open-collector output configuration
• Supports manual reset input functionality

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix 'U+' against official datasheets to confirm package type and environmental compliance status. Confirm availability as distributor records indicate discontinuation. Ensure compatibility with target voltage thresholds before integration.

Supervisors Selection Notes

Select this component when a fixed 3.3V monitoring threshold is required. The open-drain output necessitates an external pull-up resistor. Verify that the 100ms minimum timeout meets system startup requirements. Consider alternative packages if lead-free soldering processes are mandated.

Supervisors Part Context

This part is part of the DS1818 family of voltage supervisors. It shares functional similarities with other EconoReset series components but differs in threshold voltage and package options. The DS1818 series is designed for cost-sensitive applications requiring basic power supervision without complex configuration.

Supervisors Replacement Considerations

DS1818R-10+T&R offers a different threshold voltage. DS1816R-20-U+ is a similar variant within the same series. Verify pinout compatibility and electrical specifications before substitution.