BU4235F-TR

Overview

The BU4235F-TR is a CMOS 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 V to 7 V. The typical under-voltage detection voltage is 3.5 V with a precision of ±1%. Circuit current is 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. It is housed in an SOP-4 package, supports a temperature range of -40°C to 125°C, and has a hysteresis voltage of VDET x 0.05.

Feature Summary

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

Applications

• Portable equipment power supply monitoring
• Microprocessor system reset circuits
• Battery-powered device supervision

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm the exact threshold voltage variant required, as the base part number may correspond to different detection voltages depending on the full designation. Check for end-of-life status or last-time-buy notices associated with this specific marking code.

Selection Notes

Select this component for applications requiring a simple voltage supervisor with customizable reset timing. Ensure the operating voltage range covers the system's minimum and maximum requirements. Consider the open-drain output compatibility with the target logic levels. Verify that the SOP-4 package size fits the available PCB footprint constraints.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM. These devices are designed for low-voltage monitoring in portable electronics. The BU4235F specifically denotes a 3.5V detection threshold in the F-series package variant. It serves as a fundamental supervisory component for ensuring stable operation of digital circuits.

Replacement Considerations

The BD5235G-1 is listed as a similar level part with the same pinout. Verify compatibility regarding package dimensions and electrical characteristics before substitution.