BD4943G-TR

Overview

The BD4943G-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a typical under-voltage detection threshold of 4.3 V with a precision accuracy of ±1%. The device operates within a supply voltage range from 0.7 V to 7 V and consumes a static current of 550 nA. It provides a CMOS output type without manual reset or watchdog timer functions. The component is housed in an SSOP-5 package and supports operation across a temperature range of -40°C to +125°C.

Feature Summary

• CMOS output interface for direct logic integration
• High precision voltage detection with ±1% accuracy
• Ultra-low static current consumption for power efficiency

Applications

• Processor supervisor circuits
• Power management monitoring
• Embedded system voltage supervision

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the selected part number matches the required detection voltage and output configuration. Check the lifecycle status, as this component may be marked as not recommended for new designs. Ensure compatibility with the target PCB footprint and thermal requirements.

Selection Notes

Select this component when a precise 4.3 V detection threshold is required with low power consumption. Consider the SSOP-5 package size constraints and the CMOS output drive capability. Evaluate the operating temperature range to ensure it meets the environmental specifications of the application. Compare against other series members if different detection voltages or reset delays are needed.

Part Context

This part belongs to the BU4943/BD49 series of standard voltage detectors from ROHM. It is functionally similar to the BD4943G but may differ in specific packaging or ordering details. The series is characterized by high accuracy and low current consumption, suitable for portable and battery-operated devices requiring reliable voltage supervision.

Replacement Considerations

The BD5243G-1 is listed as a similar level replacement with the same package and detection voltage. Verify electrical parameters and pinout compatibility before substitution.