BD4855G-TR

Overview

The BD4855G-TR is a standard CMOS voltage detector IC manufactured by Rohm Semiconductor. It features a fixed under-voltage detection threshold of 5.5V with a precision of ±1%. The device provides an open-drain output that asserts a low active reset signal when the supply voltage falls below the threshold. It operates within a supply voltage range of 0.95V to 10V and supports a reset active voltage range of 0.95V to 10V. The component is housed in a 5-SSOP package (2.9x2.8mm) and functions across a temperature range of -40°C to 105°C.

Feature Summary

• Provides reliable system supervision through fixed under-voltage detection at 5.5V
• Features high detection precision of ±1% for accurate threshold monitoring
• Utilizes an open-drain output configuration for flexible interface compatibility
• Operates effectively across a wide industrial temperature range

Applications

• Monitoring power supply integrity in embedded systems
• Providing reset signals for microcontrollers and digital logic circuits
• Supervising battery-powered devices requiring stable voltage thresholds
• Industrial control equipment requiring robust voltage monitoring

Procurement Notes

Verify component authenticity as this part is classified as obsolete or last-time buy status. Confirm availability through authorized distributors or surplus channels. Ensure replacement components like the BD5250G-1TR are evaluated for pin compatibility and electrical parameter alignment before integration into existing designs.

Selection Notes

Select this component for applications requiring a fixed 5.5V detection threshold with high accuracy. Consider the open-drain output for level shifting needs. Evaluate the BD5250G-1TR as a direct package-compatible alternative if new design procurement is required, noting differences in delay timer functionality and current consumption specifications.

Part Context

The BD4855G belongs to Rohm's BD48 series of standard voltage detectors. These ICs are designed for supervisory circuit applications where precise voltage monitoring is critical. The series typically offers various threshold options packaged in compact forms suitable for space-constrained electronic designs.

Replacement Considerations

The BD5250G-1TR is a recommended replacement with the same SSOP5 package. Verify that the adjustable delay timer feature does not conflict with existing circuit timing requirements.