BD4951G-TR

Overview

The BD4951G-TR is a standard voltage detector IC from ROHM Semiconductor, currently designated as obsolete. It features a typical under-voltage detection voltage of 5.1V with ±1% precision. The reset active voltage range spans 0.95V to 10V, utilizing a CMOS output type with an active low state. Circuit current consumption is 0.60μA (ON) and 0.85μA (OFF) at Vs=4.8V. Hysteresis voltage is defined as Vs x 0.05. It operates within a temperature range of -40°C to 105°C and is housed in an SSOP5 package.

Feature Summary

• CMOS output interface providing active low reset signal
• High precision voltage detection with ±1% accuracy
• Low power consumption suitable for battery-operated systems
• Wide operating voltage range supporting various supply levels

Applications

• Portable electronic devices requiring voltage monitoring
• Battery-powered equipment needing under-voltage protection
• General-purpose circuit supervision in consumer electronics

Procurement Notes

Verify component obsolescence status before integration. Confirm availability through last-time-buy channels or authorized distributors. Ensure compatibility with existing PCB footprints and design specifications. Review datasheet revisions for any final manufacturing changes. Assess long-term supply chain risks associated with discontinued components.

Selection Notes

Consider the BD5250G-1TR as a recommended replacement with similar package dimensions. Evaluate differences in output type, specifically open drain versus CMOS. Check adjusted hysteresis characteristics and precision variations. Verify thermal performance limits and operating voltage ranges. Ensure functional equivalence meets system requirements despite parameter shifts.

Part Context

Part of the BD49xxx series of high-accuracy, low-current voltage detectors. Designed for applications requiring precise voltage monitoring with minimal power draw. Offers fixed detection voltages across a specific range. Manufactured by ROHM Semiconductor for industrial and consumer markets.

Replacement Considerations

BD5250G-1TR is listed as a similar level replacement with the same SSOP5 package. Note differences in output structure and hysteresis calculation methods.