BD46E251G-MTR

Overview

The BD46E251G-MTR is a CMOS voltage detector IC designed for automotive applications, manufactured by ROHM Semiconductor. It features a fixed detection threshold of 2.5V with high accuracy and low current consumption. The device operates within a supply voltage range of 1.20V to 10V and includes a built-in counter timer for reset delay. It utilizes an open-drain output type and is housed in a compact SSOP-5 package suitable for surface mount installation.

Feature Summary

• High accuracy voltage detection with a fixed 2.5V threshold
• Built-in counter timer for programmable or fixed reset delays
• Low current consumption design optimized for battery monitoring
• Automotive-grade reliability with wide operating temperature range

Applications

• Battery backup voltage monitoring in automotive systems
• Power supply supervision for microcontrollers and logic circuits
• Under-voltage detection in electronic control units (ECUs)
• Reset signal generation for embedded systems during power transitions

Procurement Notes

Verify component authenticity through authorized distributors due to the prevalence of counterfeit electronic components. Confirm that the specific suffix matches the required package and tape/reel specifications for automated assembly processes. Ensure compliance with RoHS directives and functional safety standards relevant to automotive integration projects before final procurement decisions.

Selection Notes

Select this component when a precise 2.5V detection threshold is required for automotive power management. Consider the SSOP-5 package constraints and open-drain output compatibility with downstream logic levels. Evaluate the need for internal reset delay functionality versus external timing requirements to ensure optimal circuit design efficiency and space utilization.

Part Context

This part belongs to the BD46Exxxx-M series of voltage detectors, which are characterized by high accuracy and low power consumption. The series is specifically engineered for automotive environments, offering robust performance across extreme temperatures. It complements other ROHM power management solutions by providing reliable supervision for critical system voltages.

Replacement Considerations

The BD45E251G-MTR is documented as a parameter-equivalent alternative. Verify pinout compatibility and electrical specification alignment before substitution. Ensure that any replacement maintains the required automotive qualification standards and package dimensions for direct board integration.