BD46331G-TR

Overview

The BD46331G-TR is a voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features a fixed detection threshold of 3.3V with a precision of ±1%. The device operates within a reset active voltage range of 0.95V to 10V and includes a fixed delay timer of 100ms. It utilizes a CMOS output type with a low active state and supports manual reset functionality. The circuit current consumption is 0.80μA in the ON state (at VDET=4.8V) and 0.85μA in the OFF state. Hysteresis is set at VDET x 0.05. The component is housed in an SSOP5 package, rated for temperatures between -40°C and +105°C, and lacks watchdog or automotive certifications.

Feature Summary

• Integrated fixed delay timer eliminates the need for external capacitors for timing settings
• High accuracy voltage detection with specified hysteresis to prevent output fluctuation
• Low current consumption design suitable for battery-powered applications
• Manual reset capability allows for controlled system initialization

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Embedded systems needing reliable power-on reset sequences
• Battery-operated devices utilizing low standby current components

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the SSOP5 package dimensions match the target PCB footprint. Check the latest supply status as this component may be subject to lifecycle changes. Ensure compatibility with the required operating temperature range for the intended environment. Cross-reference the manual reset pin configuration with the system design requirements.

Selection Notes

Select this component when a fixed 3.3V threshold with high precision is required. Consider the CMOS output drive strength for interfacing with downstream logic. Evaluate the 100ms delay duration against system startup timing constraints. Verify that the manual reset feature aligns with the control strategy. Compare current consumption metrics against other supervisory ICs if power efficiency is critical.

Part Context

This part belongs to the BD46xxx series of voltage detectors, characterized by built-in counter timer delay circuits. It serves as a supervisory circuit for ensuring proper system operation during power transitions. The series is designed for general-purpose electronic applications requiring precise voltage monitoring without complex external timing components.

Replacement Considerations

BD5233G-1 is listed as a recommended replacement with the same SSOP5 package. Note differences in output type (Open Drain vs CMOS), delay adjustability, and maximum operating voltage when substituting.