BD87B41G-CTR

Overview

The BD87B41G-CTR is an automotive voltage detector IC integrating microcomputer input voltage monitoring reset and watchdog timer functions. It supports a wide operating range from 2V to 20V with typical under-voltage detection at 4.1V and ±2.0% precision. Static current is 4.5µA (ON) and 3µA (OFF). The open-drain output activates low, with adjustable delay and watchdog times via external capacitors. It operates from -40°C to 125°C in SSOP6 packaging.

Feature Summary

• Integrates microcomputer input voltage monitoring reset and clock signal monitoring watchdog timer for system redundancy
• Maintains low static current consumption across a wide input voltage range up to 20V
• Allows selection of fixed or variable reset detection voltage through external resistor adjustment
• Enables customization of reset delay time and watchdog monitoring duration via external capacitors

Applications

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

Procurement Notes

Verify the specific suffix G-C indicates the SSOP6 package configuration. Confirm the CTR suffix corresponds to the taping packaging format with a minimum packing quantity of 3000 units. Ensure the component meets AEC-Q100 Grade 1 requirements for the specified temperature range. Check that the FS supportive classification aligns with your functional safety analysis needs before finalizing procurement.

Selection Notes

Select this component when monitoring microcomputer power supplies within a 2V to 20V range is required. Choose the BD87B41G-CTR if a fixed 4.1V detection threshold is suitable, or utilize external resistors for variable thresholds. Consider this part for designs needing adjustable reset delays and watchdog timers using external capacitors. Ensure the SSOP6 package fits the board layout constraints and the -40°C to 125°C temperature range matches the application environment.

Part Context

This device belongs to ROHM's automotive voltage detector series designed for functional safety applications. It combines reset generation and watchdog functionality to enhance system reliability. The integration reduces component count compared to discrete solutions. The FS supportive classification indicates it aids in safety analysis for automotive electronics.

Replacement Considerations

BD87B46G-C offers a similar feature set with a 4.6V typical detection voltage. BD87B34G-C provides a 3.4V detection threshold. BD87B29G-C features a 2.9V detection threshold. All share the same SSOP6 package and electrical characteristics except for the detection voltage.