BD49E37G-TR

Overview

The BD49E37G-TR is a high-accuracy, low-current voltage detector IC from the BD49xxx series by ROHM Semiconductor. It features a CMOS output type and provides an active-low reset signal. The device monitors supply voltages with a typical detection threshold of 3.7V. It operates within a reset active voltage range of 0.95V to 10V. The circuit current consumption is specified at 0.60µA (ON) and 0.85µA (OFF) at Vs=4.8V. It includes hysteresis functionality defined as Vs x 0.05. The component is housed in a 5-pin SSOP package with dimensions of 2.9x2.8mm and thickness of 1.25mm. It supports an operating temperature range from -40°C to 105°C.

Feature Summary

• High accuracy voltage detection with ±1% precision
• Ultra-low current consumption for power efficiency
• CMOS output interface for direct logic integration
• Automotive grade reliability compliant with AEC-Q100

Applications

• Processor supervisor circuits requiring precise voltage monitoring
• Motor driver protection systems
• Battery-powered devices needing low quiescent current
• Automotive electronic control units

Procurement Notes

Verify the specific suffix G-TR confirms the SSOP5 tape-and-reel packaging configuration. Confirm the part status as Not Recommended for New Designs (NRND) if sourcing for new products. Ensure compatibility with existing BOMs due to potential obsolescence. Check RoHS compliance documentation for environmental regulations. Validate the manufacturing date code against project timelines.

Selection Notes

Select this component when a fixed 3.7V threshold with CMOS output is required. Consider the ultra-low current consumption for battery-sensitive applications. Verify that the 0.95V to 10V reset active range covers the system's operational needs. Ensure the SSOP5 package fits the PCB layout constraints. Evaluate the automotive qualification if used in vehicle electronics.

Part Context

This part belongs to the BD49xxx series of voltage detectors characterized by high accuracy and low current draw. The series offers various detection voltages from 2.3V to 6.0V in 0.1V increments. The BD49E37G-TR specifically targets the 3.7V detection point. It is designed for applications requiring reliable supervision without complex external components.

Replacement Considerations

BD5247G-1 is listed as a replacement with the same package but different output type and delay features.