BU4343G-TR

Overview

The BU4343G-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed threshold voltage of 4.3 V with an accuracy of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and draws a static current of 550 nA. It provides an adjustable reset delay time and utilizes a CMOS output type without manual reset or watchdog timer capabilities. The component is housed in an SSOP-5 package and supports surface mount installation. It functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• CMOS technology enables ultra-low power consumption suitable for battery-operated systems.
• Adjustable reset delay timer allows customization of response timing via external components.
• High detection accuracy ensures reliable system monitoring under varying load conditions.

Applications

• Portable electronic devices requiring low standby current
• Microprocessor reset circuits in industrial control systems
• Battery-powered equipment needing precise voltage supervision

Procurement Notes

Verify the obsolete status indicated as NRND (Not Recommended for New Designs) before procurement planning. Confirm that existing inventory meets project requirements as new design adoption is discouraged. Ensure compatibility with SSOP-5 footprint constraints during final assembly validation.

Selection Notes

Select this component when a fixed 4.3 V threshold with high precision is required. Consider the adjustable delay feature if timing synchronization is necessary. Evaluate the low static current against total system power budgets. Verify thermal performance within the specified -40°C to +125°C range for the intended environment.

Part Context

This part belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. It shares architectural similarities with other members like BU4340G-TR and BU4341G-TR, differing primarily in threshold voltage settings. The series emphasizes low power and compact packaging for modern portable electronics.

Replacement Considerations

The BD5243G-1TR is listed as a recommended replacement with the same pinout and package. Verify electrical parameter differences such as output type and current consumption during transition planning.