DS1819CR-20+T&R

Supervisors Overview

The DS1819CR-20+T&R is a MicroMonitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. 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 active high and active low push-pull outputs, includes a manual reset input, and integrates a watchdog timer. It has a reset delay time of 280 ms and consumes 12 uA of operating current. The component supports power failure detection and functions without battery backup switching. It is housed in an SOT-23-5 package and operates between -40°C and +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer for system reliability monitoring
• Provides configurable active high and active low push-pull outputs
• Includes manual reset capability for user-initiated control
• Supports power failure detection functionality

Supervisors Applications

• Voltage supervision in embedded systems
• Microcontroller reset management
• Power-on reset generation
• Watchdog timer implementation in industrial controllers

Supervisors Procurement Notes

Verify the exact suffix and tape/reel specifications against the official datasheet before ordering. Confirm that the component status aligns with project requirements, as availability may vary. Ensure compatibility with existing PCB footprints and signal levels. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Check for any specific handling or storage instructions provided in the product documentation.

Supervisors Selection Notes

Select this component when a single-channel voltage supervisor with integrated watchdog functionality is required. Consider the 3.3 V threshold and 2.7 V overvoltage limit for appropriate rail monitoring. Evaluate the 280 ms reset delay against system startup timing requirements. Verify that the SOT-23-5 package fits the design constraints. Ensure the operating temperature range meets environmental conditions.

Supervisors Part Context

This part belongs to the DS1819BR/AR/CR series of MicroMonitor supervisory circuits from Maxim Integrated. These devices are designed for simple reset and power-on reset applications. The series typically offers various threshold voltages and output configurations to suit different power supply architectures. The CR variant indicates specific temperature and performance grades defined by the manufacturer.

Supervisors Replacement Considerations

Consult the official datasheet for direct pin-to-pin replacements within the DS1819 family. Verify electrical parameters such as threshold voltage and reset delay for equivalent parts. Check package compatibility and operating temperature ranges. No specific substitute part numbers are confirmed in the provided data.