BU4247G-TR

Overview

The BU4247G-TR is a CMOS voltage detector manufactured by Rohm Semiconductor, designed for monitoring single power supply lines. It features an adjustable reset delay timer and an open-drain output active low. The typical under-voltage detection threshold is set at 4.7V with a precision of ±1%. The device operates within a reset active voltage range of 0.8 to 6V and supports a maximum supply voltage of 7V. It functions reliably across a temperature range of -40°C to +125°C. The circuit consumes minimal current, specified as 0.23μA in the on state and 0.27μA in the off state. It is housed in a compact SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with a fixed 4.7V threshold and high accuracy.
• Includes an externally adjustable reset delay timer to control output timing.
• Features an open-drain output configuration compatible with various logic families.
• Operates over an extended industrial temperature range for robust performance.

Applications

• Microprocessor system reset circuits
• Portable equipment power management
• Battery-operated device supervision
• General-purpose voltage monitoring

Procurement Notes

Verify the specific suffix G-TR confirms the SSOP-5 surface-mount package and tape-and-reel packaging format. Confirm RoHS compliance status matches project requirements. Check that the supply status aligns with long-term availability needs, as this component may be subject to end-of-life transitions. Ensure the manufacturer source is authorized to guarantee authenticity.

Selection Notes

Select this component when a 4.7V detection threshold is required with adjustable delay functionality. The open-drain output allows for flexible interfacing with different logic levels. Consider the SSOP-5 package size for space-constrained designs. Verify that the operating voltage range covers the minimum system voltage to ensure proper reset generation during brown-out conditions.

Part Context

This part belongs to the BU42xx series of voltage detectors from Rohm Semiconductor. These devices are designed for simple reset applications without manual reset or watchdog timer features. The series offers various threshold voltages to suit different power rail monitoring needs. The BU4247G variant specifically targets applications requiring a 4.7V detection point.

Replacement Considerations

The BD5247G-1TR is documented as a similar level replacement with the same pinout and package. Verify electrical parameter compatibility before substitution. Ensure the replacement maintains the required adjustable delay and open-drain output characteristics.