BU4934G-TR

Supervisors Overview

The BU4934G-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed threshold detection voltage of 3.4 V with a precision of ±1%. The device operates within a reset active voltage range of 0.7 V to 7 V and supports an operating temperature range from -40°C to +125°C. It utilizes an SSOP-5 package and draws a circuit current of 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. The output type is CMOS with a low reset state, and it includes a hysteresis voltage of VDET x 0.05.

Supervisors Feature Summary

• CMOS output structure providing low power consumption
• Fixed threshold voltage detection without manual reset capability
• Wide operating voltage range supporting various system supplies
• High accuracy detection precision for reliable supervision

Supervisors Applications

• Microprocessor system reset circuits
• Battery-powered equipment voltage monitoring
• Portable devices requiring low standby current
• Industrial control systems needing wide temperature operation

Supervisors Procurement Notes

Verify the obsolete status before procurement as this component is Not Recommended for New Designs. Confirm availability through authorized distributors only, as stock levels fluctuate. Ensure the SSOP-5 package matches your PCB footprint requirements. Check RoHS compliance documentation for regulatory adherence. Validate that the 3.4 V threshold aligns with your specific application needs.

Supervisors Selection Notes

Select this part when a fixed 3.4 V threshold is required for voltage supervision. Consider the CMOS output drive capability for interfacing with downstream logic. Evaluate the thermal performance within the -40°C to +125°C range for your environment. Compare power consumption metrics against other supervisory ICs if battery life is critical. Ensure the absence of watchdog or delay timer functions meets your design simplicity goals.

Supervisors Part Context

This component belongs to the BU4934 series of standard voltage detectors manufactured by ROHM Semiconductor. It is positioned as a legacy product in their portfolio, superseded by newer designs like the BD5234G-1. The series focuses on providing basic voltage monitoring functionality with high precision and low power consumption for general-purpose electronic applications.

Supervisors Replacement Considerations

The BD5234G-1TR is a recommended replacement with similar specifications but offers adjustable delay and open-drain output. Verify pin compatibility and electrical parameter alignment during substitution.