BU4334F-TR

Overview

The BU4334F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply integrity in electronic circuits. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The device detects under-voltage conditions with a typical threshold of 3.4 V and maintains a precision of ±1%. It delivers a low-level active reset output without manual reset or watchdog timer functionality. The component supports operation across an extended temperature range from -40°C to +125°C and consumes minimal current, specified at 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V.

Feature Summary

• CMOS voltage detection with adjustable reset delay timer
• Low power consumption suitable for battery-operated systems
• High accuracy voltage monitoring with hysteresis

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system reset circuits
• Battery-powered equipment monitoring

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm availability through authorized distributors or last-time-buy channels. Ensure compatibility with existing PCB footprints and design specifications. Check for RoHS compliance documentation if required for specific regulatory standards. Evaluate replacement options due to potential supply chain constraints.

Selection Notes

Select this component when a fixed 3.4 V threshold with adjustable delay is required. Consider the VSOF-5 package size for space-constrained designs. Verify that the CMOS output type matches the input requirements of the downstream logic. Ensure the operating temperature range meets the environmental conditions of the application.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors. It is functionally similar to other parts in the family but distinguished by its specific threshold voltage and package configuration. The 'TR' suffix indicates tape and reel packaging for automated assembly processes.

Replacement Considerations

BD5234G-1TR is listed as a recommended replacement with the same pinout.