DS1819BR-20-U

Supervisors Overview

The DS1819BR-20-U is a MicroMonitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1V to 5.5V and features a 3.3V threshold for power monitoring. The device includes an integrated watchdog timer and provides manual reset functionality. It utilizes a push-pull output configuration with active high and active low capabilities. The reset delay time is specified at 280 ms, ensuring stable system recovery. Designed for surface-mount applications, it is housed in a compact SOT-23-5 package.

Supervisors Feature Summary

• Integrates a watchdog timer for automated system fault recovery
• Supports manual reset input for user-initiated system control
• Provides flexible push-pull output with selectable active states

Supervisors Applications

• Embedded systems requiring reliable power supervision
• Microcontroller-based designs needing watchdog protection
• Industrial equipment utilizing 3.3V logic levels

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm RoHS compliance documentation matches current regulatory requirements. Validate package integrity upon receipt as the part is no longer actively manufactured. Cross-reference datasheet revisions to ensure compatibility with existing design specifications before integration into new production runs.

Supervisors Selection Notes

Select this component when a single-channel supervisor with watchdog capability is required. Ensure the 3.3V threshold aligns with the target system voltage. Verify that the SOT-23-5 footprint fits the PCB layout constraints. Consider the 280 ms reset delay against system startup timing requirements. Confirm availability of alternative sources given the end-of-life status.

Supervisors Part Context

This device belongs to the DS1819 series of MicroMonitor circuits designed for simple voltage supervision. It complements other Maxim Integrated PMIC solutions by offering dedicated reset generation and watchdog functions in a minimal footprint. The series supports various threshold options to accommodate different logic families and power rails commonly found in consumer and industrial electronics.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available.