BD45432G-TR

Overview

The BD45432G-TR is a supervisory circuit voltage detector manufactured by ROHM Semiconductor. It features a fixed threshold voltage of 4.3 V with a precision of ±1%. The device supports a reset active voltage range from 0.95 V to 10 V and utilizes an open drain output type. It includes a manual reset function but lacks a watchdog timer or battery backup switch. The reset delay time is fixed at 200 ms. Operating specifications include a maximum supply voltage of 10 V, a power dissipation of 540 mW, and a circuit current of 0.80 μA (ON) and 0.85 μA (OFF) at VDET=4.8V. The component operates within a temperature range of -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with a fixed 4.3 V threshold and ±1% accuracy.
• Supports manual system reset functionality for controlled restart sequences.
• Features low static current consumption suitable for power-sensitive applications.
• Delivers reliable supervision across a wide operating temperature range.

Applications

• Embedded system power monitoring
• Microcontroller reset generation
• Industrial control board supervision

Procurement Notes

Verify the obsolete status and last-time-buy designation before procurement planning. Confirm that the SSOP-5 package dimensions match the target PCB footprint. Ensure the open-drain output configuration aligns with the downstream logic requirements. Check for RoHS compliance documentation if required by specific regulatory standards.

Selection Notes

Select this component when a fixed 4.3 V threshold is required for system supervision. The manual reset capability distinguishes it from auto-reset variants. Verify that the 200 ms delay meets the startup timing constraints of the monitored circuit. Consider the SSOP-5 package size for space-constrained designs requiring single-input voltage detection.

Part Context

This part belongs to the BD45 series of voltage detectors from ROHM Semiconductor. It is designed for general-purpose supervisory applications requiring high accuracy and low power consumption. The series typically offers various threshold voltages and delay times to accommodate different system requirements.

Replacement Considerations

BD5243G-1TR is listed as a recommended replacement with the same package and similar detection voltage, though it features adjustable delay and no manual reset.