BD87A29FVM-TR

Overview

The BD87A29FVM-TR is a voltage detector with an integrated watchdog timer, housed in an MSOP8 package. It features a typical under-voltage detection voltage of 2.9 V with a precision of ±1.5%. The reset active voltage range spans from 1.0 V to 10 V, utilizing an open-drain output type. The circuit draws a typical current of 5 µA when active. Hysteresis is set at VDET multiplied by 0.05, and the low-level output current is 0.7 mA. The delay circuit resistance is 10 MΩ, while the watchdog timer operates within a voltage range of 2.5 V to 10 V. It functions between -40°C and 105°C.

Feature Summary

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

Applications

• Microprocessor reset circuits requiring precise voltage monitoring
• Embedded systems needing watchdog timer functionality
• Battery-powered devices requiring low quiescent current

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging configuration. Confirm RoHS compliance status matches current regulatory requirements. Ensure the MSOP8 package dimensions align with PCB footprint specifications. Check for any obsolescence notices or lifecycle changes before finalizing procurement plans.

Selection Notes

Select this component when a fixed 2.9 V detection threshold is required. Consider the ±1.5% precision for applications demanding tight voltage margins. Evaluate the 5 µA current consumption against battery life requirements. Verify that the open-drain output interface is compatible with the target logic levels.

Part Context

This part belongs to ROHM's voltage detector family featuring integrated watchdog timers. It shares the MSOP8 package form factor with other series members but differs in detection voltage thresholds. The design supports industrial temperature ranges and offers adjustable timing via external capacitors.

Replacement Considerations

BD87A34FVM-TR serves as a substitute with a 3.4 V detection threshold. Verify that the higher trip point meets system requirements. Both parts share identical pinouts and package styles, facilitating direct replacement if voltage levels allow.