BD4931G-TR

Overview

The BD4931G-TR is a standard voltage detector IC from ROHM Semiconductor, designed for monitoring power supply levels in electronic circuits. It features a detection threshold of 3.1 V with a precision of ±1%. The device operates within a reset active voltage range of 0.95 V to 10 V and utilizes a CMOS output type. Key electrical parameters include a maximum power dissipation of 540 mW and a circuit current consumption of 0.60 μA (ON) and 0.85 μA (OFF) at Vs=4.8V. It supports an operating temperature range from -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• High accuracy detection voltage with ±1% precision
• Ultra-low current consumption for efficient power management
• CMOS output type suitable for digital logic interfaces
• Wide operating temperature range for industrial applications

Applications

• Microcontroller reset circuits requiring precise voltage monitoring
• Logic circuit supervision to ensure stable operation
• Battery-powered devices needing low standby current
• Industrial control systems operating in wide temperature ranges

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific packaging variants such as tape and reel options. Ensure the supplier provides valid traceability documentation. Cross-reference part numbers to avoid confusion with similar series components like BD5231G-1. Validate that the received units match the specified SSOP-5 package dimensions and pinout configuration.

Selection Notes

Select this component when a fixed 3.1 V threshold is required for system supervision. Consider the CMOS output capability for direct interfacing with digital inputs. Evaluate the ±1% accuracy against system tolerance requirements. Compare current consumption metrics with other series members if ultra-low power is critical. Ensure the operating temperature range meets the environmental conditions of the target application.

Part Context

The BD4931G-TR belongs to the BD49xxx series of standard voltage detectors produced by ROHM Semiconductor. This series is characterized by high accuracy and low current consumption, offering both N-channel open drain and CMOS output options across various detection voltages. The BD4931G-TR specifically provides a CMOS output variant with a 3.1 V threshold, fitting into the broader portfolio of supervisory circuits designed for reliable power management in compact packages.

Replacement Considerations

The BD5231G-1TR is listed as a recommended replacement with the same SSOP-5 package. Verify compatibility regarding output type differences, as the substitute uses an open-drain output instead of CMOS. Check if the adjustable delay timer feature in the replacement aligns with design requirements, as the original lacks this function.