BU4223F-TR

Overview

The BU4223F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features an open-drain output and operates within a reset active voltage range of 0.7 to 7 V. The typical under-voltage detection voltage is 2.3 V with a precision of ±1%. Circuit current is 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. It supports an external delay circuit resistance of up to 10.0 MΩ. The device functions in temperatures from -40°C to 125°C and is housed in an SOP4 package.

Feature Summary

• Adjustable reset delay timer functionality
• Open-drain output configuration
• Low power consumption design

Applications

• Portable equipment monitoring
• Battery-powered systems supervision
• General-purpose voltage monitoring

Procurement Notes

Verify the supply status carefully as this component may be subject to end-of-life or last-time-buy conditions. Confirm RoHS compliance and specific ordering suffixes for tape-and-reel packaging. Ensure the selected variant matches the required SOP4 package dimensions and temperature range specifications before finalizing procurement orders.

Selection Notes

Select this part when an adjustable delay time is required for reset signaling. Verify that the 2.3 V detection threshold aligns with the system's low-voltage requirements. Consider the open-drain output capability for interfacing with various logic levels. Check if the SOP4 package fits the available PCB footprint constraints.

Part Context

This component belongs to the BU42xxF series of voltage detectors from ROHM. It is designed for supervisory circuits in portable devices. The 'TR' suffix indicates tape-and-reel packaging. It serves as a replacement for older variants like the BU4223F, offering similar pinouts and functionalities within the same product family.

Replacement Considerations

BD5223G-1 is listed as a recommended replacement with the same pinout. Verify compatibility regarding package type (SSOP5 vs SOP4) and electrical characteristics such as output drive current and operating voltage range before substitution.