BU4342FVE-TR

Overview

The BU4342FVE-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed threshold voltage of 4.2 V with a precision of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and supports adjustable reset delay times. It utilizes a VSOF-5 surface-mount package and delivers a CMOS output type. The component functions without manual reset or watchdog timer capabilities, maintaining a typical operating current of 550 nA. It is rated for an extended temperature range from -40°C to +125°C.

Feature Summary

• CMOS output interface for direct logic integration
• Adjustable reset delay timer functionality
• High detection accuracy with ±1% threshold precision
• Low power consumption suitable for battery-operated systems

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring in portable devices
• Power supply supervision in embedded systems
• Over-voltage and under-voltage protection modules

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance documentation matches specific manufacturing batches. Check for alternative sourcing channels as standard availability may be restricted. Ensure storage conditions adhere to moisture sensitivity level requirements prior to assembly.

Selection Notes

Select this component when a fixed 4.2 V threshold is required for single-input voltage monitoring. Consider the adjustable delay feature if timing control for reset signals is necessary. Evaluate the VSOF-5 package constraints against PCB layout space limitations. Compare operating current specifications against other series members if ultra-low power is critical.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors. It shares architectural similarities with other members like the BU4344FVE-TR but differs in threshold settings. The series is characterized by compact packaging and low standby current, targeting space-constrained consumer electronics and industrial control applications requiring reliable power supervision.

Replacement Considerations

The BD5242G-1 is listed as a recommended replacement with similar specifications. Verify pinout compatibility and electrical parameter alignment before substitution. Note that the replacement uses an SSOP-5 package, requiring PCB footprint adaptation.