BD4928G-TR

Overview

The BD4928G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It features a typical under-voltage detection threshold of 2.8V with a precision of ±1%. The device supports a reset active voltage range from 0.95V to 10V and utilizes a CMOS output type. It operates without a manual reset or watchdog timer function. Key electrical characteristics include a circuit current of 0.60μA at VS=4.8V when active and 0.85μA when off. Hysteresis is defined as Vs multiplied by 0.05. The component is housed in an SSOP5 package and is currently classified as not recommended for new designs.

Feature Summary

• CMOS output structure for low-power voltage supervision
• Standard hysteresis characteristic proportional to supply voltage
• Compact SSOP5 surface-mount packaging

Applications

• Microprocessor power supply monitoring
• Portable battery-powered equipment supervision
• Multi-output power system oversight

Procurement Notes

Verify the obsolete status before procurement, as this part is not recommended for new designs. Confirm availability through authorized distributors for existing production support. Ensure the ordering suffix matches the required tape-and-reel quantity. Check RoHS compliance documentation for regulatory adherence. Validate that the SSOP5 package dimensions fit the target PCB layout constraints.

Selection Notes

Select this component only for legacy system maintenance or replacement where the original design specified the BD4928G. Evaluate the fixed 2.8V threshold against the specific rail voltage requirements of the application. Consider the CMOS output drive capability for interfacing with downstream logic. Assess if the lack of adjustable delay or manual reset meets the system safety protocols. Compare against newer alternatives if new design implementation is possible.

Part Context

This component belongs to the BD49xx series of standard voltage detectors from ROHM Semiconductor. These devices are engineered for general-purpose power management tasks requiring reliable voltage threshold detection. The series typically offers various threshold options within a compact footprint, catering to consumer electronics and industrial control applications where space efficiency and low standby current are prioritized.

Replacement Considerations

The BD5228G-1TR is documented as a similar level replacement with the same package. Verify compatibility regarding the open-drain output difference and adjusted voltage range specifications.