BU4235FVE-TR

Overview

The BU4235FVE-TR is a voltage detector IC manufactured by Rohm Semiconductor, designed for monitoring single-channel power supply voltages. It features an open-drain output and provides a low-active reset signal with an adjustable delay timer to prevent false triggering during power-up or brown-out events. The device operates within a wide temperature range of -40°C to +125°C and supports a maximum supply voltage of 7V. Key electrical specifications include a typical under-voltage detection threshold of 3.5V with ±1% precision, a hysteresis voltage defined as VDET x 0.05, and a reset active voltage range spanning from 0.7V to 7V. The circuit current varies between 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V, while the output can sink up to 3.3mA in the low state and source 6.5mA in the high state.

Feature Summary

• Provides simple reset and power-on reset functionality with an adjustable delay timer to ensure stable system initialization.
• Features an open-drain output type that allows flexible interfacing with various logic families through external pull-up resistors.
• Includes built-in hysteresis to enhance noise immunity and prevent output oscillation during voltage transitions near the detection threshold.

Applications

• Microcontroller unit (MCU) power supply supervision
• Embedded system voltage monitoring
• Portable electronic device power management

Procurement Notes

Verify component authenticity against official Rohm Semiconductor documentation due to end-of-life status. Confirm package integrity and storage conditions prior to assembly. Cross-reference pinouts with recommended replacements if sourcing new inventory. Ensure compliance with RoHS3 standards and check for specific manufacturing date codes relevant to project requirements.

Selection Notes

Select this component when a fixed 3.5V detection threshold with adjustable timing is required. Consider the BD5235G-1 series for pin-compatible alternatives with updated availability. Evaluate the open-drain output capability against system logic levels. Assess the operating temperature range suitability for the intended environmental conditions.

Part Context

This part belongs to the BU42xxFVE series of voltage detectors from Rohm Semiconductor. It is specifically engineered for low-power applications requiring precise voltage monitoring. The VSOF-5 package offers a compact footprint suitable for space-constrained designs. The series is characterized by high accuracy and low standby current consumption.

Replacement Considerations

The BD5235G-1TR is a recommended replacement with the same pinout. Verify compatibility regarding package dimensions and electrical characteristics before substitution.