BU46L304G-TL

Supervisors Overview

The BU46L304G-TL is a voltage detector IC from the ROHM BU46 series, designed for monitoring single-channel power supplies. It features a fixed threshold voltage of 3.0 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.

Supervisors Feature Summary

• Integrated counter timer delay circuit eliminates the need for external capacitors for delay time setting.
• Highly accurate voltage detection with ±1% precision ensures reliable system supervision.
• Low current consumption design minimizes power usage during operation.

Supervisors Applications

• Monitoring battery-powered devices requiring precise voltage thresholds.
• Supervising microprocessor reset lines in embedded systems.
• Protecting memory circuits against undervoltage conditions.

Supervisors Procurement Notes

Verify the obsolete status and NRND designation before procurement, as this part may not be recommended for new designs. Confirm availability through authorized distributors, noting that some sources indicate limited or discontinued stock. Ensure compatibility with existing PCB footprints and validate that the open-drain output configuration meets system requirements without additional pull-up components.

Supervisors Selection Notes

Select this component when a fixed 3.0 V threshold with a 400 ms delay is required for single-input monitoring. Consider the open-drain output type if active-low reset signaling is needed. Evaluate the low quiescent current for battery-sensitive applications. Compare against similar BU46 series variants if different threshold voltages or delay times are acceptable for the specific design constraints.

Supervisors Part Context

This voltage detector belongs to the BU45/BU46 series of ROHM Semiconductor, which focuses on high-accuracy, low-current supervisory circuits. The series is characterized by built-in delay timers, reducing external component count. The BU46L304G-TL specifically offers a 3.0 V threshold in an SSOP-3 package, targeting compact consumer and industrial electronics requiring reliable power management supervision.

Supervisors Replacement Considerations

The BD5230G-1 is listed as a similar specification replacement with comparable voltage detection characteristics. Verify pinout compatibility and output type differences, as the BD5230G-1 features adjustable delay timing rather than fixed delay. Ensure the replacement meets the same thermal and electrical specifications for the intended application.