BD87B41FVM-CTR

Overview

The BD87B41FVM-CTR is an automotive-grade voltage detector IC with a built-in watchdog timer, designed for monitoring microcontroller input voltages and clock signals. It features a typical under-voltage detection threshold of 4.1V with ±2.0% precision. The device operates within a reset active voltage range of 2V to 20V and maintains low static current consumption (4.5µA ON, 3µA OFF). It supports adjustable reset delay and watchdog monitoring times via external capacitors, ensuring system redundancy in harsh environments.

Feature Summary

• Integrates microcomputer input voltage monitoring reset function and microcomputer clock signal monitoring watchdog timer function.
• Maintains low static current levels even at wide input voltages up to 20V to enhance system redundancy.
• Allows selection of fixed or variable reset detection voltage through adjustment of external resistors.
• Enables regulation of reset delay time and watchdog monitoring time via external capacitors.

Applications

• Automotive microcontroller power supply monitoring
• System redundancy enhancement in vehicle electronics
• Watchdog timer implementation for MCU clock signal supervision

Procurement Notes

Verify the specific suffix 'CTR' indicates tape-and-reel packaging configuration as per manufacturer standards. Confirm AEC-Q100 Grade 1 qualification status matches project requirements. Ensure compatibility with MSOP8 package dimensions during PCB layout. Cross-reference functional safety support category documentation for intended automotive applications.

Selection Notes

Select this component when integrated voltage detection and watchdog functionality are required in a single package. Consider the 4.1V detection threshold against target supply rails. Evaluate external resistor and capacitor availability for timing adjustments. Verify operating temperature range suitability for -40°C to 125°C automotive environments.

Part Context

Part of Rohm's BD87Bxx series of voltage detectors with watchdog timers. Designed specifically for automotive applications requiring high reliability and functional safety support. Shares architectural similarities with BD87B46FVM-C but differs in detection voltage threshold.

Replacement Considerations

BD87B46FVM-CTR offers similar functionality with a 4.6V detection threshold. BD37B41FVM-CTR provides comparable voltage detection without the integrated watchdog timer feature. Verify pinout and electrical specifications before substitution.