BU45L344G-TL

Overview

The BU45L344G-TL is a voltage detector IC from the ROHM BU45/BU46 series, designed for monitoring single-input power supplies. It features a fixed threshold voltage of 3.4 V with ±1% accuracy and a reset delay timer of 400 ms. The device operates within a supply voltage range of 0.6 V to 6 V and consumes a typical operating current of 2.8 µA. It utilizes an open-drain output type and is housed in an SSOP-3 package. The component supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay time setting.
• Highly accurate voltage detection with ±1% precision for reliable system supervision.
• Low current consumption design suitable for battery-powered applications.

Applications

• Portable electronic devices requiring low standby current
• Battery-operated equipment needing precise voltage monitoring
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify availability status as this component may be obsolete or not recommended for new designs. Confirm package integrity and moisture sensitivity level handling requirements upon receipt. Ensure compatibility with existing PCB footprint and soldering profiles. Check for any recent product change notices affecting specifications or manufacturing location.

Selection Notes

Select this part when a fixed 3.4 V threshold with 400 ms delay is required. Consider the open-drain output configuration for interfacing with microcontrollers. Evaluate the SSOP-3 package constraints against board space limitations. Compare against similar series members if different thresholds or delay times are needed.

Part Context

This component belongs to the BU45/BU46 series of voltage detectors known for high accuracy and low power consumption. It is manufactured by ROHM Semiconductor and typically used in applications where reliable power supervision is critical without adding complexity through external timing components.

Replacement Considerations

BD5234G-1 is listed as a similar specification replacement option. Verify electrical parameters and pinout compatibility before substitution. Note that BD5234G-1 offers adjustable delay instead of fixed delay.