DS1818-5

Supervisors Overview

The DS1818-5 is a voltage supervisory circuit from the EconoReset series, designed to monitor a single power supply rail. It features a threshold voltage of 3.06 V and an overvoltage threshold of 3.15 V. The device provides an active low, open-drain reset output with a fixed reset delay time of 250 ms. It supports manual pushbutton reset functionality and operates within a supply voltage range up to 5.5 V. The component is available in TO-92-3 through-hole packaging and functions across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides automatic power-on reset and manual pushbutton reset capability for system stability.
• Features an active low, open-drain output suitable for interfacing with various logic families.
• Includes dedicated overvoltage detection to protect against supply transients exceeding nominal levels.

Supervisors Applications

• Microprocessor and microcontroller power supply monitoring
• Battery-powered systems requiring reliable reset generation
• Industrial control circuits needing manual reset inputs

Supervisors Procurement Notes

Verify current availability status as distribution channels may list this part as discontinued or obsolete. Confirm package type matches design requirements, noting that the base model typically utilizes through-hole packaging distinct from surface-mount variants like the SOT-23 version. Ensure compatibility with existing board layouts before procurement.

Supervisors Selection Notes

Select this component when a simple, cost-effective supervisor with manual reset is required for single-rail monitoring. Compare against the DS1818R series if surface-mount assembly is necessary, as pinouts and packages differ. Verify that the 250 ms delay meets system startup timing constraints and that the open-drain output aligns with downstream logic requirements.

Supervisors Part Context

This part belongs to the Maxim Integrated EconoReset family, which offers basic supervision functions without complex watchdog timers or battery backup switches. It serves as a fundamental building block for ensuring proper initialization of digital logic circuits in embedded systems where advanced features are unnecessary.

Supervisors Replacement Considerations

The DS1818R-5+T&R is a surface-mount alternative within the same functional family, offering identical electrical characteristics but in a SOT-23-3 package. Designers must account for footprint changes and potential pinout differences when substituting between through-hole and surface-mount versions.