BD4934G-TR

Overview

The BD4934G-TR is a CMOS voltage detector IC from the BD49xxx series, manufactured by Rohm Semiconductor. It features a fixed under-voltage detection threshold of 3.4V with a precision of ±1%. The device provides an active-low reset signal via a push-pull output stage. It operates within a supply voltage range of 0.7V to 7V and maintains low power consumption, drawing 0.40μA in the ON state and 0.55μA in the OFF state at VDET=4.8V. Hysteresis is set at VDET x 0.05. The component is housed in a 5-pin SSOP package (SC-74A/SOT-753) and supports an operating temperature range of -40°C to 125°C.

Feature Summary

• CMOS output structure providing active-low reset functionality for processor supervision
• Fixed 3.4V detection threshold with ±1% accuracy for precise voltage monitoring
• Low current consumption design suitable for battery-powered applications
• Integrated hysteresis to prevent output oscillation during voltage transitions

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Battery-operated electronic devices needing low-power supervision
• Portable equipment utilizing CMOS logic interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications, as this part may be restricted for new designs. Ensure packaging specifications match system requirements before procurement.

Selection Notes

Select this component when a fixed 3.4V threshold with high accuracy is required. Consider the push-pull output capability if driving loads directly without external pull-up resistors. Evaluate thermal performance within the specified -40°C to 125°C range for environmental compatibility.

Part Context

This voltage detector belongs to the BD49xxx family of standard voltage detectors. It serves as a specialized supervisory circuit designed to monitor power supply levels and generate reset signals for digital systems. The series emphasizes low current draw and compact packaging for modern electronics.

Replacement Considerations

BD5234G-1 is a recommended replacement with similar package and detection voltage but offers adjustable delay and open-drain output.