DS1814BR-5/T&R

Supervisors Overview

The DS1814BR-5/T&R is a MicroMonitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of up to 5.5 V and monitors a single input channel. The device features a fixed threshold voltage of 5 V with an overvoltage detection threshold at 4.5 V. It provides push-pull outputs that are active high and active low, ensuring versatile interface compatibility. Key timing parameters include a reset delay time of 280 ms. The component supports manual reset functionality and includes a watchdog timer for system reliability. It is housed in a SOT-23-5 package and functions reliably across an operating temperature range from -40 C to +85 C.

Supervisors Feature Summary

• Integrates both power-fail detection and a watchdog timer within a single supervisory circuit.
• Provides configurable push-pull output states supporting both active high and active low logic levels.
• Includes manual reset capability allowing external intervention for system recovery.

Supervisors Applications

• Embedded systems requiring reliable power supervision and automated reset mechanisms
• Microcontroller-based designs needing integrated watchdog protection against software hangs
• Industrial control units operating in environments with variable power supply stability

Supervisors Procurement Notes

Verify the specific suffix designation when ordering, as tape-and-reel packaging variations may exist. Confirm the manufacturer source, noting potential listings under Maxim Integrated or Analog Devices Inc. Ensure the part number matches the exact threshold voltage requirements for your application. Cross-reference datasheets to confirm pinout compatibility if substituting older revisions. Validate RoHS compliance status through official documentation before final procurement decisions.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog functionality is required. The fixed 5 V threshold suits standard logic families without needing adjustable references. Consider the SOT-23-5 package size for space-constrained printed circuit board layouts. Evaluate the 280 ms reset delay against system startup requirements to ensure adequate stabilization time. Verify that the push-pull output drive strength meets the load requirements of the connected microcontroller reset pin.

Supervisors Part Context

This device belongs to the DS1814 series of MicroMonitor circuits designed for comprehensive power management. It combines voltage monitoring with watchdog timer capabilities to enhance system robustness. The series is characterized by low quiescent current consumption and precise threshold accuracy. It serves as a critical component in maintaining operational integrity for digital systems subject to power fluctuations or software errors.

Supervisors Replacement Considerations

DS1814CR-10+T&R offers similar supervisory functions but features a different threshold voltage configuration. DS1819BR-20+T&R provides comparable MicroMonitor capabilities with potentially distinct timing characteristics. Verify electrical parameter alignment and package compatibility before implementing any substitute components in existing designs.

Supervisors FAQ

Does the DS1814BR-5/T&R include a watchdog timer?

Yes, the device integrates a watchdog timer to monitor system activity and trigger a reset if the processor fails to service it within the specified timeframe.

What is the reset delay time for this supervisory circuit?

The reset delay time is 280 ms, providing sufficient time for the power supply to stabilize before asserting the reset signal.