BD45421G-TR

Overview

The BD45421G-TR is a voltage detector supervisory circuit manufactured by ROHM Semiconductor. It features a fixed threshold voltage of 4.2 V with an accuracy of ±1%. The device operates within a supply voltage range up to 10 V and includes a manual reset function. It provides an open-drain output with a fixed reset delay time of 90 ms minimum. The component supports a wide operating temperature range from -40°C to +105°C and is housed in a 5-SSOP package.

Feature Summary

• Provides manual reset capability for system control
• Features open-drain output configuration
• Includes fixed delay timer for stable reset generation

Applications

• Microprocessor reset circuits
• Battery-powered device supervision
• Portable equipment power monitoring

Procurement Notes

Verify the current lifecycle status as the part may be discontinued or subject to last-time buy restrictions. Confirm package compatibility and electrical specifications against the official datasheet before integration. Check for authorized replacement components if availability is limited.

Selection Notes

Select this component for applications requiring a fixed 4.2 V detection threshold with manual reset functionality. Ensure the design accommodates the open-drain output structure and the specified reset delay time. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This component belongs to the BD45 series of voltage detectors from ROHM Semiconductor. It is designed for low-power supervision tasks in portable and industrial electronics. The SSOP-5 package allows for compact surface-mount implementation in space-constrained designs.

Replacement Considerations

BD5242G-1TR is listed as a similar alternative with the same package type.