BU4929G-TR

Supervisors Overview

The BU4929G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic systems. It operates within a supply voltage range of 0.95 V to 10 V and features a fixed under-voltage detection threshold of 2.9 V with ±1% precision. The device utilizes a CMOS output type and lacks manual reset, watchdog timer, or battery backup switch functionalities. It is housed in an SSOP-5 package and supports operation across a temperature range of -40 °C to 105 °C.

Supervisors Feature Summary

• Provides precise under-voltage detection with a fixed 2.9 V threshold and high accuracy.
• Features a compact SSOP-5 surface-mount package suitable for space-constrained designs.
• Operates over a wide supply voltage range from 0.95 V to 10 V.

Supervisors Applications

• Microprocessor power supply monitoring
• Portable battery-powered equipment
• Test and measurement instruments

Supervisors Procurement Notes

Verify the specific operating temperature range requirements against the datasheet, as some sources indicate up to 125 °C while others specify 105 °C. Confirm that the CMOS output type aligns with the load interface requirements. Ensure the fixed 2.9 V threshold meets the system's under-voltage lockout specifications before finalizing procurement.

Supervisors Selection Notes

Select this component when a fixed 2.9 V detection threshold is required for single-input voltage monitoring. Consider the CMOS output drive capability and the absence of delay timers or watchdog features. Evaluate the SSOP-5 package constraints and ensure the operating temperature range fits the environmental conditions of the target application.

Supervisors Part Context

The BU4929G-TR belongs to the BU49xx series of standard voltage detectors from ROHM Semiconductor. This series is engineered for reliable power management in portable and industrial devices. The part is designated as Not Recommended for New Designs (NRND), indicating it is supported for existing production but not encouraged for new development projects.

Supervisors Replacement Considerations

The BD5229G-1 is documented as a replacement with the same package and similar detection voltage. Verify compatibility regarding output type differences and operating temperature ranges before substitution.