BD87B23G-CTR

Overview

The BD87B23G-CTR is an automotive voltage detector IC integrating a reset function for microcomputer input voltage monitoring and a watchdog timer for clock signal supervision. It maintains low static current across a wide input voltage range of up to 20V, enhancing system redundancy with minimal power consumption. The reset detection voltage is selectable as fixed or variable via external resistors. Reset delay time and watchdog monitoring duration are adjustable using external capacitors. Key electrical parameters include a typical under-voltage detection voltage of 2.3V, precision of ±2.0%, and an open-drain output active in the low state.

Feature Summary

• Integrates reset and watchdog timer functions for microcomputer supervision
• Supports functional safety analysis for automotive applications
• Features adjustable reset delay and watchdog timing via external components
• Maintains low static current across a wide operating voltage range

Applications

• Microcomputer input voltage monitoring in automotive systems
• Microcomputer clock signal supervision via watchdog timer
• Automotive electronic control units requiring functional safety support

Procurement Notes

Verify the specific suffix G-C against the official Rohm Semiconductor datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets AEC-Q100 Grade 1 requirements for your target automotive environment. Confirm RoHS compliance status directly from the manufacturer's documentation before procurement.

Selection Notes

Select this component when designing automotive circuits requiring integrated voltage supervision and watchdog functionality. The fixed 2.3V detection threshold suits applications where this specific under-voltage level is appropriate. Consider external resistor and capacitor values to customize reset delays and watchdog intervals according to system timing requirements.

Part Context

This part belongs to Rohm Semiconductor's automotive-grade voltage detector family designed for functional safety support. It shares architectural similarities with other models in the series, differing primarily in detection voltage thresholds and package options. The SSOP6 package provides a compact solution for space-constrained automotive PCB layouts.

Replacement Considerations

Direct substitutes within the same series include BD87B29G-CTR (2.9V), BD87B34G-CTR (3.4V), and BD87B46G-CTR (4.6V). Verify that the alternative detection voltage aligns with the microcomputer's supply requirements. Ensure the replacement maintains the same SSOP6 package and functional safety classification.