BD4945G-TR

Overview

The BD4945G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It features a fixed under-voltage detection threshold of 4.5V with a typical precision of ±1%. The device utilizes CMOS output technology and operates within a supply voltage range of 0.8V to 10V. It supports an operating temperature range from -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• CMOS output type for digital logic compatibility
• High accuracy voltage detection with ±1% precision
• Wide operating supply voltage range up to 10V
• Extended industrial temperature capability

Applications

• Microprocessor reset circuits
• Battery-powered system supervision
• Portable equipment power management
• Industrial control system monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required tape-and-reel packaging configuration. Check current lifecycle status as this part may be subject to discontinuation notices. Ensure compliance with RoHS directives and relevant environmental regulations for your target market.

Selection Notes

Select this component when a fixed 4.5V threshold is required for system supervision. Consider the CMOS output drive capability against load requirements. Evaluate the SSOP-5 package dimensions against PCB layout constraints. Compare performance metrics such as quiescent current and hysteresis characteristics against alternative supervisory ICs if lower power consumption is critical.

Part Context

This component belongs to the BD49 series of standard voltage detectors from ROHM Semiconductor. These devices are engineered for reliable power supply monitoring in consumer and industrial electronics. The series offers various threshold options to accommodate different logic families and system voltage levels, providing a standardized solution for reset generation and voltage supervision tasks.

Replacement Considerations

BD5245G-1TR is listed as a replacement option with similar specifications and package compatibility.