BU4242F-TR

Overview

The BU4242F-TR is a voltage detector with an adjustable delay time, designed for monitoring power supply voltages. It features a typical under-voltage detection voltage of 4.2V with ±1% precision. The reset active voltage range spans from 0.7V to 7V. It utilizes an open-drain output type and supports an adjustable reset delay timer. The circuit current is specified at 0.40μA (on) and 0.55μA (off) at Vdet=4.8V. It operates within a temperature range of -40°C to +125°C and is housed in an SOP-4 package.

Feature Summary

• Provides under-voltage detection with high precision threshold accuracy
• Features an externally adjustable reset delay timer for customized timing control
• Delivers low power consumption suitable for battery-operated applications
• Offers an open-drain output compatible with various logic families

Applications

• Microprocessor system reset circuits
• Portable equipment power management
• Battery-powered device supervision
• Industrial control system monitoring

Procurement Notes

Verify the specific suffix F indicates the SOP-4 package configuration distinct from other variants. Confirm RoHS compliance status as per the latest manufacturer documentation. Check supply status as this component may be subject to end-of-life notices or limited availability. Ensure ordering part numbers match the required tape-and-reel quantity specifications for production integration.

Selection Notes

Select this component when a precise 4.2V threshold is required with flexible delay timing. Compare against BD5242G-1 for similar functionality in SSOP-5 packages if pinout compatibility allows. Evaluate current consumption requirements against the specified 0.40μA on-state value. Consider the operating temperature range suitability for the intended environmental conditions.

Part Context

Part of the BU42xx series voltage detectors from Rohm Semiconductor, focusing on low-voltage monitoring solutions. This series provides configurable delay times and high accuracy for reliable system supervision. The BU4242 variant specifically targets applications requiring a 4.2V detection threshold with adjustable timing characteristics for robust power management.

Replacement Considerations

BD5242G-1 serves as a similar level replacement with the same pinout but in an SSOP-5 package. Verify package dimension compatibility and pin assignment alignment before substitution. Review datasheet differences regarding electrical parameters and operating conditions to ensure functional equivalence.