BU4335F-TR

Overview

The BU4335F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 3.5 V and a precision of ±1%. The reset active voltage range spans from 0.7 V to 7 V. The output type is CMOS, and the reset active state is low. It does not include manual reset or watchdog timer functions. The circuit current is 0.40 μA when ON (at VDET=4.8V) and 0.55 μA when 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

• Adjustable reset delay timer functionality
• CMOS output type with low active state
• Wide reset active voltage range

Applications

• General purpose voltage monitoring
• Microprocessor reset circuits
• Battery powered device supervision

Procurement Notes

Verify the supply status as Last Time Buy before finalizing procurement plans. Confirm that the SOP-4 package and CMOS output specifications align with the target design requirements. Ensure compatibility with the specified operating temperature range and voltage thresholds for the intended application environment.

Selection Notes

Select this component for applications requiring a specific 3.5 V detection threshold with adjustable delay timing. Consider the low power consumption characteristics suitable for battery-operated systems. Verify that the SOP-4 package fits the available PCB space and that the CMOS output interface matches the downstream logic requirements.

Part Context

This part belongs to the BU43xx series of voltage detectors from ROHM Semiconductor. It is designed for supervisory circuits where precise voltage monitoring and controlled reset timing are necessary. The series offers various detection voltages and packages to suit different system constraints.

Replacement Considerations

The BD5235G-1 is listed as a similar level replacement with the same pinout. Note differences in package (SSOP-5 vs SOP-4) and output type (Open drain vs CMOS) when substituting.