DS1818-20/T&R

Supervisors Overview

The DS1818-20/T&R is a single-channel power supply supervisor IC from the EconoReset series, manufactured by Analog Devices Inc./Maxim Integrated. It provides simple reset and power-on reset functionality with a fixed threshold voltage of 2.55V. The device features an open-drain or open-collector output that asserts a low-active reset signal when the monitored voltage drops below the threshold. It includes a minimum reset timeout of 100ms to ensure stable system recovery. Designed for through-hole mounting, it utilizes a TO-92-3 package and operates within a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides simple reset and power-on reset supervision for a single voltage channel
• Features a fixed 2.55V threshold voltage for monitoring power supply integrity
• Generates a low-active reset signal via open-drain or open-collector output
• Includes a minimum 100ms reset timeout to prevent premature system restart

Supervisors Applications

• Embedded systems requiring basic power supply monitoring
• Microcontroller-based designs needing reliable power-on reset sequences
• Industrial control units operating in moderate temperature environments
• Consumer electronics utilizing single-voltage rail architectures

Supervisors Procurement Notes

Verify component status as this specific part number may be discontinued or subject to limited availability. Confirm package compatibility, as the TO-92-3 form factor differs from surface-mount alternatives like SOT-23. Ensure the fixed 2.55V threshold aligns with the target application's voltage requirements before procurement. Check for RoHS compliance documentation if required by regional regulations.

Supervisors Selection Notes

Select this component when a through-hole solution is preferred over surface-mount packages for board space or assembly constraints. The fixed 2.55V threshold suits applications where the supply voltage remains consistently above this level during normal operation. Consider the open-drain output capability for interfacing with various logic families. Evaluate the 100ms timeout duration against the system's startup requirements to ensure adequate stabilization time.

Supervisors Part Context

This component belongs to the DS1818 family of supervisory circuits, which are designed for cost-effective power management solutions. The EconoReset series emphasizes simplicity and reliability for basic reset functions. The manufacturer, Analog Devices Inc./Maxim Integrated, produces this line under its established portfolio of mixed-signal integrated circuits. The T&R suffix indicates tape-and-reel packaging, although the TO-92-3 package typically implies through-hole mounting configurations.

Supervisors Replacement Considerations

DS1816R-20+T&R: Similar supervisor with open-drain output but different package options. DS1818R-20+T&R: Surface-mount equivalent in SOT-23-3 with identical electrical characteristics.