BD46E231G-MTR

Overview

The BD46E231G-MTR is a fixed-delay voltage detector IC designed for automotive applications, featuring a typical under-voltage detection threshold of 2.3V with ±1% precision. It operates within a reset active voltage range of 0.95V to 10V and utilizes a CMOS output type. The device incorporates a fixed reset delay timer of 100msec and supports manual reset functionality. Circuit current consumption is specified at 0.80µA in the ON state and 0.85µA in the OFF state at Vs=4.8V. Hysteresis voltage is set at Vdet x 0.05, with an L-output current capability of 1.2mA. The component is housed in an SSOP-5 package and complies with RoHS standards.

Feature Summary

• Built-in fixed delay timer eliminates the need for external capacitors for timing settings.
• High accuracy voltage detection with ±1% precision ensures reliable monitoring.
• Low current consumption design optimizes power efficiency in battery-backed systems.
• Automotive-grade qualification supports functional safety analysis requirements.

Applications

• Microprocessor reset circuits in automotive electronic control units
• Battery voltage monitoring in vehicle power management systems
• Supervisory circuits for embedded controllers requiring fixed delay response

Procurement Notes

Verify the supply status as End-of-Life or Not Recommended for New Designs before integration. Confirm that the SSOP-5 package and CMOS output configuration match the target schematic. Ensure compatibility with the 2.3V detection threshold and 100msec delay requirement. Check for RoHS compliance documentation if required by specific regional regulations. Validate that the manual reset feature aligns with the system's recovery logic.

Selection Notes

Select this component when a precise 2.3V threshold with high accuracy is required for automotive voltage supervision. The fixed 100msec delay is suitable for applications needing deterministic reset timing without external components. Consider the low standby current for battery-sensitive designs. The CMOS output drives digital inputs directly, simplifying interface design compared to open-drain alternatives. Verify that the operating temperature range meets the environmental conditions of the installation site.

Part Context

This part belongs to the BD46Exxxx-M series of voltage detectors from ROHM Semiconductor. The series is characterized by built-in counter timers and high accuracy, targeting automotive counter-timer applications. It complements other variants in the family that offer different detection voltages and output types, such as open-drain configurations.

Replacement Considerations

Check for direct pin-compatible replacements within the BD46Exxxx-M series if different thresholds are needed. Verify if the BD45Exxxx-M series offers similar features with open-drain outputs if CMOS drive is not strictly required. Ensure any substitute maintains the AEC-Q100/AEC-Q101 qualification and fixed delay characteristics.

FAQ

Does the BD46E231G-MTR require an external capacitor for the delay timer?

No, the device has a built-in fixed delay timer circuit, eliminating the need for an external capacitor to set the delay time.

What is the output configuration of this voltage detector?

The BD46E231G-MTR features a CMOS output type, which provides a push-pull drive capability suitable for direct connection to digital logic inputs.

Is manual reset supported on this component?

Yes, the BD46E231G-MTR supports manual reset functionality, allowing the user to force a reset state via a dedicated input pin.