BU4313F-TR

Overview

The BU4313F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single power supply lines. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is set at 1.3 V with a precision of ±1%. The device draws a circuit current of 0.40 μA in the ON state and 0.55 μA in the OFF state at VDET=4.8V. It utilizes a SOP-4 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• CMOS output type provides low standby current consumption suitable for battery-powered applications.
• Adjustable reset delay timer allows customization of the reset pulse width via external components.
• High accuracy voltage detection ensures reliable system supervision across varying load conditions.

Applications

• Portable electronic devices requiring low-power voltage supervision
• Battery-operated equipment needing under-voltage lockout protection
• General-purpose microcontroller reset circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolete status indicators, as this part may be subject to discontinuation. Ensure packaging specifications match reel requirements for automated assembly processes.

Selection Notes

Select this component when a fixed 1.3 V threshold with high precision is required. Consider the SOP-4 package constraints for PCB layout. Evaluate the adjustable delay feature against fixed-delay alternatives if timing flexibility is critical for the specific application sequence.

Part Context

This part belongs to the BU42(43)xxF series of voltage detectors. It shares functional similarities with other members like the BU4313G but differs in package type and specific electrical characteristics. The F-series typically denotes specific packaging and performance variations within the broader product line.

Replacement Considerations

The BD5213G-1 is listed as a recommended replacement with the same pinout. Verify compatibility regarding the reset active voltage range (0.8 V to 6 V vs 0.7 V to 7 V) and output drive capabilities before substitution.