BD87B29G-CTR

Overview

The BD87B29G-CTR is an automotive voltage detector IC integrating a reset function for monitoring microcomputer input voltage and a watchdog timer (WDT) for clock signal supervision. It operates within a reset active voltage range of 2 to 20 V, supporting wide input voltages up to 20 V. The typical under-voltage detection voltage is 2.9 V with ±2.0% precision. Static current consumption is low at 4.5 µA (ON) and 3 µA (OFF). The device features an open-drain output, adjustable reset delay and WDT time via external capacitors, and hysteresis of VDET×0.036. It is housed in an SSOP6 package, rated for -40°C to 125°C, and complies with AEC-Q100 Grade 1 standards.

Feature Summary

• Integrates power-on reset and watchdog timer functions for microcomputer system redundancy
• Supports wide input voltage operation up to 20 V while maintaining low static current consumption
• Allows configurable reset detection voltage and timing parameters through external resistors and capacitors

Applications

• Automotive microcomputer input voltage monitoring
• Microcomputer clock signal supervision via integrated watchdog timer
• Redundancy enhancement for low-power automotive electronic systems

Procurement Notes

Verify the specific suffix G-CTR against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets AEC-Q100 Grade 1 requirements for your target automotive application. Cross-reference the part number with functional safety documentation if used in safety-critical circuits. Confirm RoHS compliance status prior to integration.

Selection Notes

Select this component when designing automotive systems requiring both voltage supervision and watchdog functionality in a compact SSOP6 package. It is suitable for applications needing adjustable reset thresholds and timing delays via external components. Consider its low static current characteristics for battery-sensitive environments. Verify that the 2.9 V detection threshold aligns with the microcontroller's operating voltage requirements.

Part Context

This part belongs to Rohm Semiconductor's BD87Bxx series of automotive voltage detectors. These ICs are designed to support functional safety analysis and are qualified under AEC-Q100 standards. The series typically includes variants with different detection voltages and package options, such as MSOP8 or SSOP6, catering to diverse automotive embedded control unit needs.

Replacement Considerations

BD87B23G-CTR: Similar SSOP6 package and feature set but with a 2.3 V detection voltage. BD87B46FVM-CTR: Different MSOP8 package with a 4.6 V detection voltage.