BU46L404G-TL

Supervisors Overview

The BU46L404G-TL is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It features a fixed threshold voltage of 4.0 V with an accuracy of ±1%. The device operates within a maximum supply voltage of 6 V and consumes a typical operating current of 2.8 µA. It provides a CMOS output type and includes a built-in reset delay timer of 400 ms, eliminating the need for external capacitors. The component supports operation across a temperature range of -40°C to +105°C and is housed in an SSOP-3 package.

Supervisors Feature Summary

• Built-in counter timer delay circuit eliminates the requirement for external delay-setting capacitors.
• CMOS output interface compatible with standard digital logic circuits.
• High detection accuracy maintained at ±1% threshold precision.

Supervisors Applications

• Monitoring battery voltage levels in portable electronic devices
• Supervising power supply rails in embedded microcontroller systems
• Ensuring system stability during power-up and power-down sequences

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to obsolete status. Confirm RoHS compliance details via official documentation. Check moisture sensitivity handling requirements before assembly. Validate pinout compatibility with existing PCB layouts. Review datasheet specifications for thermal performance limits.

Supervisors Selection Notes

Select this component when a fixed 4.0 V threshold is required for single-channel supervision. Consider the low quiescent current for battery-powered applications. Ensure the SSOP-3 package fits the available footprint. Verify that the 400 ms internal delay meets system timing constraints without external components.

Supervisors Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. The series is characterized by integrated delay timers and CMOS outputs. The BU46L404G-TL specifically targets applications requiring precise 4.0 V monitoring with minimal external component count.

Supervisors Replacement Considerations

Public confirmed substitute: BD5231G-1TR. Note differences in package (SSOP5 vs SSOP3) and output type (Open drain vs CMOS).

Supervisors FAQ

Does the BU46L404G-TL require an external capacitor for the reset delay?

No, the device has a built-in counter timer delay circuit, making external capacitors unnecessary for setting the delay time.

What is the reset delay time for this specific model?

The reset delay time is fixed at 400 ms.