BU4315FVE-TR

Overview

The BU4315FVE-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a maximum supply voltage of 7 V and features an adjustable reset delay time. The device provides a detection threshold voltage of 1.5 V with a precision of 1%. It draws a typical operating current of 550 nA and functions reliably across a temperature range of -40°C to +125°C. Packaged in a VSOF-5 surface-mount format, it lacks manual reset, watchdog timer, or chip enable functionalities.

Feature Summary

• CMOS output type for direct interface with digital logic circuits
• Adjustable reset delay time controlled by external components
• High accuracy voltage detection with 1% threshold precision
• Low power consumption suitable for battery-operated systems

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system power supply supervision
• Battery-powered equipment voltage monitoring
• Industrial control circuit protection

Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as discontinued. Confirm package integrity and pin alignment against the VSOF-5 specification before integration. Ensure design compatibility with the 1.5 V threshold and 7 V maximum input limits. Check for RoHS compliance documentation if required by regional regulations. Validate replacement options such as BD5215G-1 if new production is needed.

Selection Notes

Select this component when a fixed 1.5 V detection threshold is required for single-supervision applications. The VSOF-5 package suits space-constrained designs needing surface-mount assembly. Consider the adjustable delay feature for noise immunity requirements. Evaluate the 550 nA quiescent current against system power budgets. Verify that the CMOS output drive capability meets downstream load requirements without additional buffering.

Part Context

This device belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. It shares architectural similarities with other parts in the family, differing primarily in detection threshold voltage and specific package variations. The series is characterized by CMOS outputs and adjustable delay timers, targeting general-purpose supervisory roles in consumer and industrial electronics.

Replacement Considerations

The BD5215G-1 is documented as a same-pinout replacement option. Note that the BD5215G-1 uses an SSOP5 package instead of VSOF-5 and features an open-drain output rather than CMOS. Verify mechanical fit and electrical interface compatibility before substitution.