BD49E42G-TR

Overview

The BD49E42G-TR is a CMOS output voltage detector IC from the BD49xxx series by ROHM Semiconductor. It provides a fixed detection threshold of 4.2V with an accuracy of ±1%. The device operates within a supply voltage range of 0.95V to 10V and features a reset delay timer of 100µs. It draws a typical operating current of 900nA and is housed in a 5-pin SSOP package. The component supports an operating temperature range from -40°C to +105°C.

Feature Summary

• CMOS output structure for low power consumption
• High precision voltage detection with ±1% accuracy
• Fixed reset delay timer for stable signal generation

Applications

• Processor supervisor circuits
• Battery voltage monitoring systems
• Portable electronic device power management

Procurement Notes

Verify the specific suffix G-TR against official ROHM documentation to confirm the tape and reel packaging configuration. Ensure the part number matches the exact threshold voltage requirements for your design, as minor suffix variations may indicate different packages or testing conditions. Cross-reference with the latest datasheet revision to confirm RoHS compliance and environmental certifications before finalizing procurement orders.

Selection Notes

Select this component when a fixed 4.2V threshold is required with high accuracy and low standby current. The CMOS output is suitable for direct interfacing with digital logic inputs. Consider the 100µs reset delay for timing-sensitive applications. Verify that the 5-pin SSOP package fits the available PCB footprint constraints and thermal requirements of the target enclosure design.

Part Context

This part belongs to the BD49xxx series of voltage detectors, which are designed for high accuracy and low current consumption. The series offers various detection voltages from 2.3V to 6.0V in 0.1V increments. The BD49E42G-TR specifically targets applications requiring precise monitoring of 4.2V rails, such as lithium-ion battery protection or 3.3V/5V system supervision.

Replacement Considerations

BD5242G-1 is listed as a replacement option with the same package type but features an open-drain output instead of CMOS.