BD4950G-TR

Overview

The BD4950G-TR is a single-channel voltage detector manufactured by Rohm Semiconductor, designed for monitoring power supply integrity. It features a fixed detection threshold of 5V with a precision of ±1%. The device provides an active-low reset signal via a CMOS output interface. It operates within a wide supply voltage range from 0.95V to 10V and maintains functionality across an industrial temperature range of -40°C to +105°C. Packaged in a compact 5-SSOP (SC-74A) form factor, it supports surface-mount installation.

Feature Summary

• CMOS output structure providing low current consumption and direct logic interfacing capabilities
• Active-low reset signal generation triggered when monitored voltage falls below the threshold
• High accuracy voltage detection with specified tolerance ensuring reliable system supervision

Applications

• Portable equipment power management systems
• Battery-powered electronic devices requiring voltage supervision
• General-purpose microprocessor reset circuits

Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as obsolete or last-time buy. Confirm package variant matches SC-74A/SOT-753 specifications. Check RoHS compliance documentation for regulatory adherence. Validate that the ordering suffix corresponds to the required tape-and-reel quantity. Ensure design-in compatibility with existing PCB footprints before final procurement decisions.

Selection Notes

Select this component when a fixed 5V threshold is required for system monitoring. The CMOS output is suitable for low-power applications compared to open-drain alternatives. Consider the operating voltage range limits and thermal characteristics against specific environmental requirements. Evaluate the package dimensions for space-constrained designs. Verify that the absence of delay timers or watchdogs aligns with the application's timing needs.

Part Context

This component belongs to the BD49xxx series of standard voltage detectors from Rohm Semiconductor. The series offers various fixed detection voltages ranging from 2.3V to 6.0V in precise increments. These devices are characterized by high accuracy and low current consumption, targeting portable and battery-operated electronics where power efficiency and reliable supervision are critical.

Replacement Considerations

BD5250G-1TR is identified as a similar replacement option with the same SSOP5 package. Note that the alternative features an open-drain output and adjustable delay timer, differing from the CMOS fixed-output nature of the original part.