BU45K482G-TL

Overview

The BU45K482G-TL is a voltage detector IC from the ROHM BU45 series, designed for monitoring single power supply lines. It features an open-drain output and operates within a maximum supply voltage of 6 V. The device detects voltages with a threshold of 4.8 V and includes a built-in reset delay timer of 200 ms, eliminating the need for external capacitors. It offers high accuracy of ±1% and low current consumption of 2.8 µA. The component is housed in an SSOP-3 package and supports operation temperatures from -40°C to +105°C.

Feature Summary

• Built-in counter timer delay circuit removes requirement for external delay-setting capacitors
• High detection accuracy with ±1% precision for reliable voltage monitoring
• Low power consumption suitable for battery-operated applications
• Compact SSOP-3 package design with pin rotation for simplified layout

Applications

• Monitoring microprocessor power supply rails
• Battery voltage level detection in portable devices
• Reset signal generation for digital logic circuits
• Over-voltage or under-voltage protection systems

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Availability is restricted to last-time buy scenarios or existing stock. Verify end-of-life status directly with authorized distributors before finalizing designs. Ensure all regulatory compliance requirements are met with alternative components if long-term supply is required.

Selection Notes

Select this part when a fixed 200 ms delay is acceptable and minimal external components are desired. The open-drain output requires a pull-up resistor. Consider the BU46 series for CMOS outputs or BD52 series for lower current consumption if specifications allow. Verify package compatibility and thermal performance for the specific application environment.

Part Context

Part of the BU45/BU46 series of highly accurate voltage detectors. These ICs integrate internal delay timers to simplify circuit design. The BU45 variant specifically provides an open-drain output interface. This series targets cost-sensitive consumer electronics requiring reliable supervision without complex external timing networks.

Replacement Considerations

BD5248G-1TR is listed as a recommended replacement with similar specifications. Note that the substitute uses an SSOP-5 package instead of SSOP-3, requiring PCB layout adjustments. Verify electrical parameter alignment before substitution.