BU46K304G-TL

Overview

The BU46K304G-TL is a voltage detector IC from ROHM Semiconductor's BU45/BU46 series, designed for monitoring single-input supply voltages. It features a CMOS output type and operates within a maximum supply voltage of 6 V. The device has a threshold voltage of 3 V with an accuracy of 1%. It includes a built-in counter timer delay circuit providing a reset delay time of 400 ms, eliminating the need for external capacitors. The component supports surface mount installation in an SSOP-3 package and functions across a temperature range of -40 C to +105 C.

Feature Summary

• Built-in counter timer delay circuit removes requirement for external delay-setting capacitors
• High accuracy voltage detection with 1% precision threshold monitoring
• Low current consumption design suitable for battery-powered applications
• CMOS output configuration for direct logic interface compatibility

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring in portable devices
• Power supply supervision for embedded systems
• Over-voltage or under-voltage protection modules

Procurement Notes

Verify component authenticity through authorized distributors as the part status is obsolete. Confirm RoHS compliance details via official documentation before integration. Check humidity sensitivity handling requirements during storage and assembly. Ensure replacement strategies are evaluated due to end-of-life status. Validate package dimensions against PCB footprint specifications.

Selection Notes

Select this component when a fixed 3 V threshold with CMOS output is required. Consider the integrated 400 ms delay for noise immunity without external components. Evaluate thermal performance within the specified operating temperature range. Compare quiescent current requirements against alternative low-power detectors. Assess package availability constraints given the obsolete lifecycle status.

Part Context

This voltage detector belongs to the BU45/BU46 series, characterized by high accuracy and low power consumption. The series utilizes internal timing circuits to simplify board layout. The BU46K304G-TL variant specifically offers a 3 V detection point with CMOS output characteristics. It represents a compact solution for single-channel voltage supervision in space-constrained designs.

Replacement Considerations

The BD5230G-1 is listed as a similar specification replacement option. Verify electrical parameter alignment including threshold voltage and output type. Confirm package compatibility and pinout correspondence before substitution. Review datasheet differences regarding delay times and operating conditions.