BD46455G-TR

Overview

The BD46455G-TR is a voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features a fixed reset delay time of 50 milliseconds and supports manual reset functionality. The typical under-voltage detection threshold is set at 4.5V with a precision of ±1%. The device operates within an active voltage range of 0.95V to 10V and utilizes a CMOS output type. It is housed in an SSOP-5 package and complies with RoHS standards.

Feature Summary

• Fixed 50ms reset delay timer ensures stable system recovery after voltage restoration.
• Manual reset capability allows for external control over the reset state.
• CMOS output interface provides direct compatibility with digital logic circuits.

Applications

• General-purpose power supply supervision in electronic equipment
• Microprocessor and memory circuit reset management
• Embedded system voltage monitoring

Procurement Notes

Verify the specific ordering suffix (TR) to confirm tape-and-reel packaging configuration. Ensure the part number matches the exact detection voltage and package variant required for the design. Confirm availability status as this component may be subject to end-of-life or last-time-buy notices from the manufacturer.

Selection Notes

Select this component when a fixed 50ms delay and manual reset are required. Compare against adjustable delay alternatives if timing flexibility is needed. Verify that the 4.5V threshold aligns with the target system's brown-out protection requirements and that the CMOS output drives the subsequent logic levels correctly.

Part Context

This part belongs to the BD46 series of voltage detectors from ROHM. It is functionally similar to other models in the family but distinguished by its specific 4.5V threshold and fixed delay characteristics. It serves as a dedicated supervisory circuit for ensuring reliable operation in low-power applications.

Replacement Considerations

The BD5245G-1 is listed as a recommended replacement with the same SSOP-5 package. Note that the substitute features an adjustable delay timer instead of a fixed one, which may require circuit modification if precise timing is critical.