DS1816R-5-U+

Supervisors Overview

The DS1816R-5-U+ is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 2.0V to 5.5V and features a fixed reset threshold voltage of 3.3V. The device provides an active-low open-drain reset output with a typical reset delay time of 205ms. It functions across an industrial temperature range from -40°C to +85°C and is housed in a compact SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Provides reliable power-fail detection for microprocessor systems
• Features a manual pushbutton reset capability for system control
• Delivers a stable active-low reset signal upon power-up or undervoltage events

Supervisors Applications

• Microprocessor power supply monitoring
• Battery-powered electronic devices requiring low-voltage supervision
• Embedded systems needing manual reset functionality

Supervisors Procurement Notes

Verify the specific suffix 'U+' indicates RoHS compliance and lead-free status when sourcing. Confirm the manufacturer designation as Analog Devices Inc. or Maxim Integrated to ensure authenticity. Check current lifecycle status, as this component may be subject to limited availability or discontinuation notices. Ensure the SOT-23-3 footprint matches your PCB design requirements before finalizing procurement.

Supervisors Selection Notes

Select this component when a fixed 3.3V threshold is required for system supervision. Consider the SOT-23-3 package size constraints for space-limited designs. Evaluate the need for manual reset integration versus software-controlled alternatives. Verify that the open-drain output interface is compatible with the target logic levels and pull-up resistor configurations in the application circuit.

Supervisors Part Context

This part belongs to the EconoReset family of supervisory circuits designed for cost-sensitive applications. It simplifies power management by combining voltage monitoring and reset generation in a minimal footprint. The series targets consumer electronics and industrial controls where reliable power sequencing is critical without complex external components.

Supervisors Replacement Considerations

Cross-reference with other DS1816 variants for different threshold voltages if 3.3V is not suitable. Verify pinout compatibility with alternative single-channel supervisors in the SOT-23-3 package. Ensure replacement parts maintain the same manual reset feature and active-low output polarity.