BD49E31G-MTR

Overview

The BD49E31G-MTR is a high-accuracy voltage detector IC from ROHM Semiconductor, designed for automotive applications. It features a typical under-voltage detection threshold of 3.1V with ±1% precision. The device operates within a reset active voltage range of 0.95V to 10V and utilizes a CMOS output type. It consumes ultra-low current, specified at 0.60µA in the ON state and 0.85µA in the OFF state when Vs=4.8V. The component is housed in an SSOP5 package with dimensions of 2.9x2.8mm (t=1.25) and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• High accuracy detection capability with ±1% precision for reliable voltage monitoring.
• Ultra-low current consumption design suitable for power-sensitive automotive systems.
• Automotive-grade qualification supporting functional safety analysis requirements.

Applications

• Automotive electronic control unit power supervision
• Battery voltage monitoring in vehicle systems
• Processor supervisor circuits requiring high accuracy

Procurement Notes

Verify supply status as this part may be marked Not Recommended for New Designs. Confirm package integrity and RoHS compliance upon receipt. Check for functional safety documentation if required for automotive integration. Ensure ordering suffix matches specific tape-and-reel requirements for automated assembly processes.

Selection Notes

Select this component when precise voltage threshold monitoring is critical for automotive safety systems. The CMOS output interface simplifies logic level interfacing with microcontrollers. Consider the low standby current for battery-backed applications. Verify that the SSOP5 package fits the available PCB footprint constraints compared to alternative SOT23-5 packages.

Part Context

This voltage detector belongs to the BD49 series, which focuses on high-accuracy monitoring solutions. The 'E' suffix typically denotes enhanced automotive specifications. The 'MTR' suffix indicates the specific tape-and-reel packaging format for surface-mount technology assembly lines.

Replacement Considerations

BD5231G-1 is listed as a recommended replacement with the same SSOP5 package. Note differences in output type (Open Drain vs CMOS) and delay timer adjustability when substituting.