BD87A41FVM-TR

Overview

The BD87A41FVM-TR is a voltage detector with a watchdog timer manufactured by ROHM Semiconductor. It features an under-voltage detection threshold of 4.1V (typical) with a precision of ±1.5%. The device operates within a reset active voltage range of 1.0V to 10V and consumes a typical circuit current of 5µA. It includes an adjustable reset delay timer via an external capacitor on the CT terminal and a watchdog timer function configurable via the CTW terminal. The output is an N-channel open-drain type, active low. The component is housed in an MSOP8 package and supports an operating temperature range from -40°C to 105°C.

Feature Summary

• High detection voltage accuracy of ±1.5% across the specified temperature range.
• Ultra-low power consumption with a typical operating current of 5µA.
• Integrated watchdog timer for system monitoring and fault recovery.

Applications

• Microprocessor reset circuits requiring precise voltage supervision
• Battery-powered systems needing low standby current
• Industrial control units utilizing watchdog functionality

Procurement Notes

Verify the specific suffix and packaging configuration against the official datasheet before ordering. Confirm that the MSOP8 package dimensions match your PCB footprint requirements. Ensure the voltage threshold aligns with your system's supply rail specifications. Check for any end-of-life notices or recommended new designations from the manufacturer.

Selection Notes

Select this component when a fixed 4.1V detection threshold is required. Consider the ±1.5% precision for applications demanding tight voltage margins. The integrated watchdog timer simplifies design compared to discrete solutions. Verify compatibility with the available external timing capacitors for delay and watchdog settings.

Part Context

This part belongs to the BD87A series of voltage detectors from ROHM Semiconductor. The series is characterized by high precision and low current consumption. Similar models in the family offer different detection voltages, such as 2.9V or 3.4V, while maintaining similar package and feature sets. The BD87A series is designed for reliable system supervision in various electronic applications.

Replacement Considerations

Check for direct substitutes like the BD87A29FVM or BD87A34FVM if different voltage thresholds are acceptable. Verify pinout compatibility and package dimensions before substitution. Review datasheets for any differences in watchdog functionality or current consumption.