BU4234F-TR

Overview

The BU4234F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single power supply lines. 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 3.4 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 is housed in a compact SOP-4 package.

Feature Summary

• Adjustable reset delay timer functionality allows customization of response timing via external components.
• Open-drain output structure provides flexibility for interfacing with various logic families.
• Wide operating voltage range supports diverse system power supply requirements.

Applications

• Microprocessor system supervision
• Portable equipment power management
• Battery-operated device monitoring

Procurement Notes

Verify the specific suffix 'F' indicates the SOP-4 package configuration distinct from other variants. Confirm RoHS compliance status through official documentation before integration. Ensure design compatibility with the open-drain output requirements of the target circuit. Check current supply status as older revisions may have limited availability.

Selection Notes

Select this component when a fixed 3.4 V threshold with adjustable delay is required. Compare against BD52xxG series equivalents if SSOP-5 packaging or different current characteristics are preferred. Verify that the absence of a watchdog timer meets system safety requirements. Ensure the SOP-4 footprint fits the available PCB space constraints.

Part Context

This part belongs to the BU42(43)xxF series of voltage detectors from ROHM. It serves as a supervisory circuit for ensuring stable operation of digital systems. The F-series typically denotes specific package and thermal characteristics compared to G-series alternatives.

Replacement Considerations

BD5234G-1 is listed as a similar level replacement with the same pinout but in an SSOP-5 package. Verify package dimension compatibility before substitution.