BD46E455G-MTR

Overview

The BD46E455G-MTR is an automotive-grade voltage detector IC manufactured by Rohm Semiconductor. It features a typical detection voltage of 4.5 V with ±1% precision and a fixed reset delay timer of 50 msec. The device operates within a supply voltage range of 0.95 V to 10 V and supports CMOS output types. It consumes ultra-low current, specified as 850 nA in operating mode. The component is housed in a compact SSOP5 package (2.9x2.8 mm) and complies with AEC-Q100 standards for automotive applications.

Feature Summary

• Built-in counter timer eliminates the need for external delay setting capacitors
• Ultra-low current consumption suitable for battery-powered systems
• Automotive grade qualification ensuring reliability under harsh conditions
• Compact SSOP5 package design similar to SOT-23-5

Applications

• Automotive electronic control unit power monitoring
• Battery backup system supervision
• Microcontroller reset circuit generation
• Portable device power management

Procurement Notes

Verify the specific suffix G-MTR against official Rohm documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with AEC-Q100 requirements if deploying in automotive environments. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status prior to integration into regulated assemblies.

Selection Notes

Select this component when a precise 4.5 V threshold with high accuracy is required for automotive voltage supervision. The integrated 50 msec delay timer simplifies board layout by removing external timing components. Consider the low quiescent current for energy-sensitive applications. Verify that the CMOS output capability meets the input requirements of the downstream logic circuits.

Part Context

This part belongs to the BD46 series of voltage detectors designed specifically for automotive use. It shares functional similarities with other models in the family but is distinguished by its specific 4.5 V detection threshold and 50 msec fixed delay characteristic. The series emphasizes low power consumption and robust performance across the extended automotive temperature range.

Replacement Considerations

BD46E451G-MTR offers a similar form factor but features a different 100 msec delay time. BD48E45G-MTR provides an open-drain output instead of CMOS, requiring pull-up resistor consideration. Verify electrical compatibility before substitution.