BD46341G-TR

Overview

The BD46341G-TR is a voltage detector supervisory circuit manufactured by ROHM Semiconductor, designed for monitoring single-input power supply voltages. It features a fixed detection threshold of 3.4 V with a precision of ±1%. The device provides a CMOS output type and includes a manual reset function without a watchdog timer. It operates within a reset active voltage range of 0.95 V to 10 V and incorporates a fixed delay timer of 100 msec. The circuit draws a typical current of 0.80 μA when ON and 0.85 μA when OFF at VDET=4.8V. It supports an operating temperature range from -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with a fixed 3.4 V threshold and ±1% accuracy.
• Features a CMOS output interface with a manual reset capability for system control.
• Incorporates a fixed 100 msec reset delay timer to ensure stable power-up sequencing.
• Operates across a wide voltage range of 0.95 V to 10 V with low standby current consumption.

Applications

• Monitoring battery-powered systems requiring precise voltage supervision
• Reset generation for microcontrollers and digital logic circuits
• Power supply monitoring in industrial control equipment
• Voltage supervision in automotive electronics (non-critical)
• Backup power switching detection in embedded systems

Procurement Notes

Verify the specific suffix and packaging configuration against the official ROHM datasheet before ordering, as availability may vary by region. Confirm that the SSOP-5 package dimensions match your PCB footprint requirements. Check for any recent lifecycle notices such as Last Time Buy status or recommended replacements like the BD5234G-1 if long-term supply assurance is required. Ensure compliance with RoHS directives for your target market.

Selection Notes

Select this component when a fixed 3.4 V detection threshold with high precision is required for single-channel voltage monitoring. The CMOS output and manual reset feature make it suitable for applications needing direct interface with digital logic without additional pull-up resistors. Consider the 100 msec fixed delay for noise immunity during power transitions. Evaluate the low current consumption for battery-operated designs. Compare with adjustable threshold alternatives if flexibility in detection voltage is needed.

Part Context

The BD46341G-TR belongs to the BD46 series of voltage detectors from ROHM Semiconductor, which are designed for reliable power supply supervision in compact electronic devices. This series emphasizes low power consumption and high accuracy, making it suitable for portable and industrial applications. The SSOP-5 package allows for space-efficient PCB layouts. The part is often compared with similar devices like the BD5234G-1, which offers adjustable delay but lacks manual reset functionality.

Replacement Considerations

The BD5234G-1 is listed as a recommended replacement with the same SSOP-5 package. However, note that the BD5234G-1 features an open-drain output and adjustable delay instead of a fixed 100 msec delay and CMOS output. Verify compatibility with existing circuit design, particularly regarding output drive requirements and reset timing specifications.