BU4219F-TR

Overview

The BU4219F-TR is a voltage detector IC from ROHM Semiconductor featuring an adjustable delay timer. It operates within a supply voltage range of 0.7V to 7V with a typical under-voltage detection threshold of 1.9V and ±1% precision. The device utilizes an open-drain output capable of sourcing up to 6.5mA at high voltage levels. It functions across a temperature range of -40°C to 125°C, consumes approximately 0.40μA in the ON state, and includes hysteresis defined as VDET x 0.05.

Feature Summary

• Features an adjustable reset delay timer for customized timing control.
• Provides precise under-voltage detection with specified accuracy margins.
• Supports wide operating voltage ranges suitable for various power rails.

Applications

• Monitoring power supply voltages in embedded systems
• Providing reset signals for microcontrollers during brown-out events
• Ensuring system stability in portable electronic devices

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity upon receipt. Validate electrical parameters against datasheet specifications before integration. Ensure storage conditions comply with manufacturer guidelines to maintain reliability. Check for alternative recommended parts if long-term availability is required.

Selection Notes

Select this component when adjustable delay functionality is required alongside precise voltage monitoring. Consider the open-drain output configuration for interfacing with logic circuits. Evaluate the wide operating temperature range for harsh environment applications. Compare current consumption requirements against similar supervisory circuits.

Part Context

This part belongs to the BU42xxxF series of voltage detectors designed for low-power supervision. It complements other models like BU4217F and BU4239F by offering specific threshold characteristics. The series supports various packaging options including SOP-4 and VSOF-5 variants for different board space constraints.

Replacement Considerations

BD5219G-1TR is identified as a replacement with the same pinout. Verify compatibility regarding package dimensions and electrical tolerances before substitution.