BU4342G-TR

Overview

The BU4342G-TR is a CMOS voltage detector from ROHM Semiconductor, designed for monitoring power supply integrity. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 4.2 V with a precision of ±1%. It utilizes an SSOP-5 package and delivers a CMOS output active at low level. Key electrical characteristics include a maximum operating temperature of +125 °C and a minimum of -40 °C.

Feature Summary

• CMOS output type providing low-active reset signal
• Adjustable reset delay timer functionality
• High accuracy voltage detection with ±1% precision
• Wide operating supply voltage range supporting low-power applications

Applications

• Portable equipment requiring low standby current
• Battery-powered systems needing reliable power supervision
• General-purpose electronic circuits requiring voltage monitoring

Procurement Notes

Verify the supply status carefully as this component is classified as Not Recommended for New Designs (NRND). Confirm that existing inventory meets project requirements before procurement. Ensure compatibility with the SSOP-5 package dimensions and verify RoHS compliance documentation matches the specific manufacturing batch. Check for alternative recommended replacements if long-term availability is critical.

Selection Notes

Select this component when a fixed 4.2 V threshold with high precision is required alongside adjustable timing delays. The CMOS output interface suits digital logic integration without additional buffering. Consider the wide temperature range for industrial or automotive environments. Evaluate the low static current consumption against system power budgets. Verify that the SSOP-5 footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the BU42(43)xxG series of supervisory circuits manufactured by ROHM Semiconductor. It is categorized under PMIC - Power Management ICs and specifically Voltage Detectors. The series is known for low power consumption and compact packaging options suitable for space-constrained designs.

Replacement Considerations

The BD5242G-1 is listed as a similar level replacement with the same pinout and package. Verify functional equivalence regarding threshold voltage and output type before substitution.