BU4216F-TR

Overview

The BU4216F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. 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 1.6 V with a precision of ±1%. The device utilizes an open-drain output type and maintains a low active state during reset conditions. It does not include manual reset or watchdog timer functionalities. The component supports a wide operating temperature range from -40°C to +125°C and consumes minimal current, specified at 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V.

Feature Summary

• Adjustable reset delay timer allows customization of response timing via external components.
• Open-drain output interface provides flexible logic level compatibility for system integration.
• Low power consumption design ensures minimal energy usage during both active and standby states.

Applications

• Portable battery-powered devices requiring precise voltage monitoring
• Embedded systems needing reliable power supply supervision
• Consumer electronics utilizing low-voltage logic families

Procurement Notes

Verify the specific suffix '-TR' indicates tape-and-reel packaging when sourcing. Confirm the supply status as 'Last Time Buy' or end-of-life if available, as this impacts long-term availability. Ensure compatibility with existing PCB footprints for SOP-4 packages. Cross-reference with recommended replacement parts like BD5216G-1 for new designs to ensure future support.

Selection Notes

Select this component when an adjustable delay feature is required alongside a fixed 1.6 V detection threshold. Consider the SOP-4 package constraints for space-limited designs. Evaluate the open-drain output requirements against pull-up resistor needs in the target circuit. Compare current consumption specifications against other detectors in the BU42 series for optimal power efficiency.

Part Context

This part belongs to the BU42xxF series of voltage detectors from ROHM. It shares functional similarities with the BU4216G but differs in package type (SOP-4 vs SSOP-5). The F-series typically denotes specific packaging and manufacturing runs. It is part of a broader family of supervisory circuits designed for general-purpose power management applications.

Replacement Considerations

The BD5216G-1 is listed as a similar level replacement with the same pinout and recommended for new designs. Verify package differences between SOP-4 and SSOP-5 during physical substitution.