BD4743G-TR

Overview

The BD4743G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It features an open collector output type and operates within a reset active voltage range of 0.85 V to 10 V. The device provides a typical under-voltage detection threshold of 4.3 V with a precision of ±1%. It lacks manual reset and watchdog timer functions. The component supports surface mount installation in an SSOP-5 package, with a maximum power dissipation of 540 mW. Operating temperatures range from -40°C to +75°C.

Feature Summary

• Monitors single power supply input for under-voltage conditions
• Provides open collector output signal for system reset control
• Operates without manual reset or watchdog timer functionality

Applications

• Power supply supervision in embedded systems
• Microcontroller reset circuit generation
• Battery-powered device voltage monitoring

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the selected part matches the required detection voltage and output configuration for the target application. Check current supply status as availability may vary by region. Ensure compliance with RoHS requirements if applicable to the manufacturing process.

Selection Notes

Select this component when a fixed 4.3 V detection threshold is required for single-channel voltage monitoring. Consider the open collector output compatibility with the downstream logic interface. Evaluate the operating temperature range limits against environmental conditions. Compare static current consumption and reset active voltage range with alternative supervisory circuits to ensure system stability.

Part Context

This component belongs to the BD47 series of standard voltage detectors from ROHM Semiconductor. It is part of a family of supervisory circuits designed for reliable power management in electronic devices. The BD4743G-TR specifically targets applications requiring precise under-voltage detection without additional complexity such as watchdog timers or manual reset inputs.

Replacement Considerations

The BD5243G-1 is listed as a recommended replacement with the same SSOP-5 package. Verify electrical parameter compatibility, particularly the detection voltage and output characteristics, before substitution.