BD87B46FVM-CTR

Overview

The BD87B46FVM-CTR is an automotive voltage detector IC integrating reset and watchdog timer functions. It features a typical under-voltage detection threshold of 4.6V with ±2.0% precision. The device supports a reset active voltage range from 2V to 20V and operates on a single input. Static current consumption is low, at 4.5µA when active and 3µA when off. It utilizes an open-drain output type with a low-active state. The component is housed in an MSOP8 package and complies with AEC-Q100 Grade 1 standards for automotive applications.

Feature Summary

• Integrates microcontroller input voltage monitoring via reset function and clock signal supervision through a built-in watchdog timer.
• Maintains low static current consumption across a wide input voltage range up to 20V to enhance system redundancy.
• Allows flexible configuration of reset detection voltage, reset delay time, and watchdog monitoring time using external resistors and capacitors.

Applications

• Automotive microcontroller power supply monitoring
• System reset generation for embedded controllers
• Watchdog timer implementation for fault detection

Procurement Notes

Verify the specific suffix 'CTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the order matches the automotive-grade AEC-Q100 qualification status intended for functional safety support. Ensure the MSOP8 package dimensions align with the target PCB footprint specifications before finalizing procurement orders.

Selection Notes

Select this component when designing automotive systems requiring integrated voltage supervision and watchdog capabilities within a compact surface-mount package. The wide operating voltage range and adjustable timing parameters offer design flexibility for various microcontroller architectures. Consider the low static current characteristics for battery-sensitive applications where power efficiency is critical during standby or operational states.

Part Context

This part belongs to Rohm Semiconductor's series of automotive voltage detectors designed for functional safety support. These ICs are engineered to monitor power integrity in vehicle electronics, ensuring reliable operation under varying electrical conditions. The integration of reset and watchdog functions reduces component count and simplifies circuit design for automotive microcontrollers.

Replacement Considerations

Consult official documentation for qualified substitute part numbers within the same automotive voltage detector family. Verify compatibility regarding detection voltage thresholds, package dimensions, and functional safety certifications before implementing any alternative components in existing designs.