BD49E27G-TR

Overview

The BD49E27G-TR is a processor supervisor IC from the BD49 series, manufactured by Rohm Semiconductor. It features a CMOS output type with an active low reset signal. The device monitors supply voltage with a typical detection threshold of 2.7V and offers high accuracy with a precision of ±1%. It operates within a reset active voltage range of 0.95V to 10V and includes a fixed reset delay timer. The component is housed in a 5-pin SSOP package and is supplied in tape and reel format.

Feature Summary

• CMOS output architecture providing active low reset functionality for digital logic interfacing
• High-precision voltage detection capability ensuring reliable monitoring of power supply levels
• Integrated fixed reset delay timer to prevent false triggering during power-up transients

Applications

• Processor system supervision for microcontrollers and embedded systems
• Battery-powered equipment requiring stable voltage monitoring
• Automotive electronic control units (ECUs) where robust power management is critical

Procurement Notes

Verify the specific suffix G-TR to confirm the SSOP-5 package and tape-and-reel packaging configuration. Ensure compatibility with the required 2.7V detection threshold for your target application. Check for end-of-life or obsolescence status as some variants in this family may be restricted for new designs. Confirm RoHS compliance requirements against your manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when a CMOS output interface is preferred over open-drain types for direct logic connection. The 2.7V threshold suits applications requiring early warning for 3.3V or 5V rail drops. Consider the ±1% precision for tight tolerance requirements. Evaluate the 100µs reset delay against system startup timing constraints to ensure proper initialization sequences are maintained without external components.

Part Context

This part belongs to the BD49xxx series of high-accuracy, low-current voltage detector ICs. The series provides various detection voltages in 0.1V increments ranging from 2.3V to 6.0V. The BD49E27G-TR specifically targets applications needing a 2.7V threshold with CMOS output characteristics, distinguishing it from the BD48xxx series which utilizes N-channel open-drain outputs.

Replacement Considerations

BD5227G-1TR is listed as a similar level replacement with the same package and detection voltage, though it has different electrical specifications such as lower current consumption and a wider operating voltage range.