BU4309G-TR

Overview

The BU4309G-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 0.9 V with a precision of ±1%. It delivers a CMOS output type with a reset active state of Low. The component supports a maximum power dissipation of 210 mW and maintains accuracy within 1% across the operating temperature range of -40°C to +125°C.

Feature Summary

• CMOS low voltage detection with adjustable reset delay timer functionality
• High accuracy voltage monitoring with ±1% detection precision
• Wide operating supply voltage range supporting diverse system requirements

Applications

• System reset circuits in embedded microcontrollers
• Voltage supervision for battery-powered devices
• Power management monitoring in portable electronics

Procurement Notes

Verify the current lifecycle status before procurement, as this component may be classified as Not Recommended for New Designs (NRND). Confirm package compatibility and electrical parameters against the official datasheet to ensure suitability for existing designs. Check availability through authorized distributors as stock levels may vary.

Selection Notes

Select this component when a CMOS output interface and adjustable reset delay are required for low voltage monitoring. Ensure the application operates within the specified temperature range and supply voltage limits. Consider the NRND status if designing new products, opting for recommended alternatives like the BD5209G-1 for long-term supply assurance.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. It is specifically engineered for low voltage detection tasks requiring high precision and low power consumption. The device complements the manufacturer's portfolio of PMIC solutions focused on system reliability and power management.

Replacement Considerations

The BD5209G-1 is documented as a replacement with the same pinout and package. Verify that the open-drain output of the alternative matches the circuit requirements compared to the CMOS output of the original part.