BU4229G-TR

Overview

The BU4229G-TR is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a CMOS output with a typical threshold voltage of 2.9 V and high accuracy of ±1%. It functions in temperatures from -40°C to +125°C, drawing a maximum operating current of 550 nA. Packaged in SSOP-5, it serves as a supervisory circuit for low-voltage detection without manual reset or watchdog capabilities.

Feature Summary

• Provides simple reset or power-on reset functionality with an open-drain or open-collector output type.
• Features an adjustable reset delay timer to accommodate specific system timing requirements.
• Operates with low static current consumption suitable for battery-powered applications.
• Delivers precise voltage detection with high accuracy across a wide operating temperature range.

Applications

• Monitoring microprocessor and microcontroller power supplies
• Supervising battery-operated electronic devices
• Ensuring system stability in portable consumer electronics

Procurement Notes

Verify the component status carefully before procurement, as this part is classified as Not Recommended for New Designs (NRND). Confirm that the SSOP-5 package and 2.9 V threshold align with existing design constraints. Ensure compatibility with the adjustable delay configuration if utilized. Check for end-of-life implications regarding long-term supply availability and potential obsolescence risks for future production runs.

Selection Notes

Select this component when a fixed 2.9 V threshold with adjustable delay is required in an SSOP-5 package. Consider the NRND status for new projects; evaluate alternatives like the BD5229G-1 for new designs. Verify that the CMOS/open-drain output interface matches the receiving logic level. Ensure the 0.7 V to 7 V input range covers the minimum expected supply voltage during operation.

Part Context

This part belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. It is functionally similar to other parts in the family but distinguished by its specific 2.9 V threshold and SSOP-5 packaging. The series focuses on low-power supervision for embedded systems, offering precision and reliability in compact surface-mount formats.

Replacement Considerations

The BD5229G-1 is listed as a recommended replacement with the same pinout and package. Verify that the BD5229G-1's slightly different electrical characteristics, such as the 0.8 V to 6 V operating range and ±0.9% accuracy, are acceptable for the application.