BU4227F-TR

Overview

The BU4227F-TR is a supervisory circuit voltage detector manufactured by ROHM Semiconductor. It features a fixed detection threshold voltage of 2.7V with a precision of ±1%. The device operates within a supply voltage range of 0.7V to 7V and provides an open-drain reset output that is active low. It includes an adjustable delay timer for reset timing control. The component supports a single monitored input channel and functions without manual reset or watchdog capabilities. It is housed in a SOP-4 package and complies with RoHS standards.

Feature Summary

• Provides low-voltage detection with a fixed 2.7V threshold
• Features an adjustable delay timer for reset timing
• Delivers an active-low open-drain reset output signal

Applications

• Power supply monitoring in electronic systems
• Microcontroller reset circuit generation
• Battery voltage supervision

Procurement Notes

Verify the specific package type and pinout configuration against the official datasheet before procurement, as variations may exist within the product family. Confirm the manufacturing status, as this component may be subject to end-of-life notices or last-time buy conditions. Ensure compatibility with the target application's voltage levels and temperature requirements. Cross-reference the ordering part number to guarantee correct revision and packaging specifications.

Selection Notes

Select this component when a fixed 2.7V detection threshold is required for power management applications. The adjustable delay feature allows customization of reset timing relative to power-up events. Consider the open-drain output capability for interfacing with various logic families. Evaluate the operating temperature range and supply voltage limits to ensure suitability for the intended environment. Compare performance metrics against alternative supervisors if precise threshold accuracy or different package options are needed.

Part Context

This component belongs to the BU4227 series of voltage detectors from ROHM Semiconductor. The series offers various threshold voltages and package options to support diverse power monitoring needs. The BU4227F-TR specifically utilizes a SOP-4 package, distinguishing it from other variants like the G-series which may use SSOP packages. This series is designed for simple reset and power-on reset applications in consumer and industrial electronics.

Replacement Considerations

The BD5227G-1TR is listed as a recommended replacement with the same pinout. Verify electrical parameter compatibility, including threshold voltage and output characteristics, before substitution. Note potential differences in package dimensions and thermal performance between the SOP-4 and SSOP-5 formats.