DS1815R-20+T&R

Supervisors Overview

The DS1815R-20+T&R is a voltage supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range up to 5.5 V and features a threshold voltage of 3.3 V with an overvoltage threshold of 2.7 V. The device provides manual reset functionality and includes a watchdog timer. It utilizes a push-pull output type and offers active high and active low configurations. The component is housed in a SOT-23-5 package and supports cut tape, reel, and MouseReel packaging formats. It functions reliably across a temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer for system stability monitoring alongside voltage supervision capabilities.
• Provides flexible output configuration options including active high, active low, and push-pull modes.
• Supports manual reset input for direct user intervention in system recovery processes.

Supervisors Applications

• Embedded systems requiring power supply monitoring and automatic reset generation
• Microcontroller-based designs needing watchdog timer protection against software faults
• Industrial control units operating within extended temperature environments

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to discontinued status. Confirm package integrity and pin alignment upon receipt. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Validate RoHS compliance documentation if required for regulatory adherence. Inspect for physical damage prior to integration into production assemblies.

Supervisors Selection Notes

Evaluate the necessity of the integrated watchdog timer against external solutions to optimize board space. Consider the specific output polarity requirements to determine if additional logic inversion is needed. Assess thermal management needs given the operational temperature limits. Verify that the 3.3 V threshold aligns precisely with the monitored rail's nominal voltage. Review alternative packages if footprint constraints differ from the SOT-23-5 form factor.

Supervisors Part Context

This component belongs to the DS1815 series of EconoReset supervisory circuits designed for cost-sensitive applications. It serves as a simplified power management solution compared to more complex PMICs. The series focuses on essential reset generation and basic system protection without extensive programmability. It complements other Maxim Integrated analog and mixed-signal products used in embedded control architectures.

Supervisors Replacement Considerations

DS1815R-20

Supervisors FAQ

Does the DS1815R-20+T&R include a chip enable pin?

No, the device does not feature a chip enable signal; it operates continuously when powered.

What is the reset delay time for this supervisory circuit?

The reset delay time is specified as 280 ms according to the official parameters.