BU4243F-TR

Overview

The BU4243F-TR is a CMOS voltage detector with an adjustable delay timer, manufactured by ROHM Semiconductor. It features a typical under-voltage detection threshold of 4.3V with ±1% precision. The reset active voltage range spans from 0.7V to 7V, utilizing an open-drain output type that activates in the low state. The device operates within a temperature range of -40°C to +125°C and consumes 0.40μA when active (at Vdet=4.8V) and 0.55μA when off. It is housed in a SOP-4 package.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• Open-drain output configuration for flexible logic interfacing
• High precision voltage detection with tight tolerance margins

Applications

• Microprocessor system reset circuits
• Battery-powered device supervision
• Portable equipment power monitoring

Procurement Notes

Verify supply status as this component may be classified as End-of-Life or Last Time Buy. Confirm package compatibility and electrical specifications against current design requirements before procurement. Check for available replacement alternatives if long-term availability is critical for production planning.

Selection Notes

Select this component for applications requiring precise voltage monitoring with customizable reset delays. Ensure the operating voltage range aligns with the system's power rails. Consider the open-drain output requirement for pull-up resistor implementation. Verify thermal performance within the specified industrial temperature range.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM Semiconductor. These devices are designed for supervisory applications in portable electronics and industrial systems. The series offers various detection thresholds and package options to suit different design constraints.

Replacement Considerations

BD5243G-1 is listed as a similar level alternative with the same pinout. Verify functional equivalence and package compatibility before substitution.