DS1836DS-20+

Supervisors Overview

The DS1836DS-20+ is a MicroManager supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1.2 V to 5.5 V and features an SOIC-8 surface-mount package. The device monitors a single input with a threshold voltage of 4.37 V and provides a CMOS open-drain output. It includes power-fail detection, battery backup switching, and a reset delay time of 500 ms. The component functions without manual reset or watchdog timer capabilities and supports operation across temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Monitors system voltage status and generates internal power-fail signals during out-of-tolerance conditions
• Automatically switches power supply to a battery source when main voltage drops below the threshold level
• Maintains active reset state for a specified duration after main voltage returns to acceptable limits

Supervisors Applications

• Systems designed to operate with dual power supplies
• PIC microprocessor applications requiring precise voltage supervision
• Equipment needing automatic battery backup switching during power transients

Supervisors Procurement Notes

Verify the exact part number against official manufacturer documentation before procurement. Confirm that the suffix indicates the correct package type and operating temperature range. Check current availability status as distribution channels may list obsolete or limited stock items. Ensure compatibility with existing board layouts regarding the SOIC-8 footprint and pin configuration.

Supervisors Selection Notes

Select this component for designs requiring integrated voltage monitoring and seamless power source transition. It eliminates the need for discrete comparator circuits and external switching components. Consider the specific threshold voltage requirements and reset timing characteristics relative to the target microprocessor's sensitivity. Verify that the open-drain output interface matches the downstream logic levels.

Supervisors Part Context

This device belongs to the MicroManager family of supervisory circuits designed for embedded systems. It integrates precision voltage references and comparators into a compact surface-mount package. The series supports both 3.3V and 5V system architectures, providing reliable power management solutions for portable and industrial electronics requiring robust voltage supervision.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data.