BU45L232G-TL

Overview

The BU45L232G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supplies. It features a threshold voltage of 2.3 V with ±1% accuracy and an open-drain output. The device includes a built-in counter timer providing a fixed reset delay of 200 ms, eliminating the need for external capacitors. Operating within a supply voltage range of 0.6 V to 6 V, it consumes 2.8 µA in the active state. Packaged in SSOP-3, it supports operation from -40°C to +105°C.

Feature Summary

• Built-in counter timer circuit provides a fixed 200 ms reset delay without requiring external timing components.
• High detection accuracy of ±1% ensures reliable voltage threshold monitoring at 2.3 V.
• Low current consumption of 2.8 µA optimizes power efficiency for battery-operated applications.
• Open-drain output configuration allows flexible interfacing with various logic levels.

Applications

• Monitoring microprocessor power supply voltages
• Battery backup system supervision
• Reset signal generation for embedded controllers

Procurement Notes

Verify component authenticity through authorized channels due to NRND status. Confirm RoHS compliance and moisture sensitivity level (MSL 3) requirements for surface mount assembly. Check datasheet for specific handling precautions during reflow soldering processes.

Selection Notes

Select this part when a precise 2.3 V threshold with fixed delay is required. Compare against adjustable delay alternatives like BD5223G-1 if timing flexibility is needed. Ensure input voltage range covers the minimum operating voltage of the monitored circuit.

Part Context

Part of the BU45/BU46 series of highly accurate, low-current voltage detectors. Designed for compact designs using SSOP-3 packaging. Intended for systems requiring simple, cost-effective supervision without complex external components.

Replacement Considerations

BD5223G-1 offers similar specifications with adjustable delay instead of fixed 200 ms. Verify package compatibility and electrical parameter alignment before substitution.

FAQ

Does the BU45L232G-TL require an external capacitor for the reset delay?

No, the internal counter timer circuit eliminates the need for an external capacitor to set the 200 ms delay.

What is the output type of this voltage detector?

It features an open-drain output suitable for connecting to pull-up resistors.