BD4955G-TR

Overview

The BD4955G-TR is a standard voltage detector IC manufactured by Rohm Semiconductor, designed for monitoring single power supply rails. It features a fixed detection threshold of 5.5V with a precision of ±1%. The device utilizes a CMOS output type that provides an active-low reset signal when the monitored voltage falls below the threshold. It operates within a wide input voltage range and supports a reset active voltage range from 0.95V to 10V. The component is housed in a compact 5-pin SSOP package (SC-74A/SOT-753) suitable for surface-mount applications.

Feature Summary

• Provides precise under-voltage detection with a fixed 5.5V threshold
• Delivers an active-low reset signal via a CMOS push-pull output
• Operates across a broad temperature range from -40°C to 105°C
• Features low current consumption for efficient power management

Applications

• Monitoring power supplies in portable electronic devices
• Ensuring system stability in industrial control equipment
• Providing reset signals for microprocessors and memory circuits
• Protecting battery-powered systems from deep discharge

Procurement Notes

Verify component authenticity through authorized distributors as the part is obsolete. Confirm replacement availability since manufacturing has ceased. Check datasheet revisions for any parameter updates before integration. Ensure packaging matches design requirements as tape-and-reel specifications may vary. Validate thermal performance against application constraints.

Selection Notes

Select this component for applications requiring a fixed 5.5V detection threshold. Consider the CMOS output capability for direct interfacing with digital logic. Evaluate the 5-SSOP package size for space-constrained PCB layouts. Assess the operating temperature range against environmental conditions. Compare current consumption metrics with alternative supervisors if power efficiency is critical.

Part Context

This component belongs to the BD49xxx series of voltage detectors from Rohm Semiconductor. The series offers various fixed detection voltages ranging from 2.3V to 6.0V. These devices are characterized by high accuracy and low current consumption. They are designed for general-purpose power supply monitoring in consumer and industrial electronics.

Replacement Considerations

The BD5250G-1TR is listed as a similar level replacement with the same package. Verify electrical compatibility as the replacement has a 5.0V threshold instead of 5.5V. Confirm pinout alignment and output drive capabilities match the original design requirements.