BU4345G-TR

Overview

The BU4345G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable reset delay timer and operates within a detection voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is 4.5 V with a precision of ±1%. The device draws a circuit current of 0.40 μA when active (at Vdet=4.8 V) and 0.55 μA when off. It utilizes an SSOP-5 package and supports RoHS compliance.

Feature Summary

• CMOS technology ensures low power consumption and high accuracy in voltage monitoring applications.
• Adjustable reset delay timer allows customization of the output response time relative to voltage changes.
• Wide operating voltage range supports diverse system requirements from low to high voltage thresholds.

Applications

• Power supply supervision in portable electronic devices
• Microprocessor reset circuits requiring precise voltage monitoring
• Battery-powered systems needing low standby current

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging if required for automated assembly. Confirm the component status as Not Recommended for New Designs (NRND) to ensure long-term availability for existing production lines. Check RoHS compliance documentation for regulatory adherence in target markets.

Selection Notes

Select this component when a fixed 4.5 V threshold with adjustable delay is required. Compare against BD5245G-1 for similar functionality in SSOP-5 packages. Ensure the application does not require manual reset or watchdog timer features, which are absent in this model.

Part Context

This part belongs to the BU43xxG series of voltage detectors from ROHM. It shares pinout compatibility with related models like the BD5245G-1. The series is characterized by CMOS construction, offering low current consumption and high precision for supervisory applications.

Replacement Considerations

BD5245G-1 is listed as a similar level replacement with the same pinout and package. Verify electrical parameter equivalence before substitution.

FAQ

Is the BU4345G-TR suitable for new designs?

No, it is marked as Not Recommended for New Designs (NRND). Existing customers may continue purchasing, but new designs should consider alternative components.

What is the reset active state of the BU4345G-TR?

The reset output is active low.