BD45431G-TR

Overview

The BD45431G-TR is a voltage detector from the ROHM BD45 series, designed for supervisory circuit applications. It features a fixed reset delay timer of 100 ms and supports manual reset functionality. The device monitors a single input with a typical under-voltage detection threshold of 4.3 V and offers ±1% precision. It operates within a reset active voltage range of 0.95 V to 10 V and utilizes an open-drain output type. The component is housed in an SSOP-5 package and functions across a temperature range of -40°C to +105°C.

Feature Summary

• Integrates a fixed 100 ms reset delay timer to ensure stable system initialization.
• Supports manual reset capability for controlled system recovery operations.
• Provides high-precision voltage monitoring with ±1% detection accuracy.

Applications

• General-purpose voltage supervision in embedded systems
• Microcontroller power-on reset circuits
• Battery-powered device monitoring

Procurement Notes

Verify the specific suffix and package configuration against the official datasheet before procurement. Confirm that the fixed delay time and manual reset features align with the design requirements. Check the supply status as this component may be subject to end-of-life notices or last-time buy conditions. Ensure compatibility with the target operating temperature range and voltage thresholds.

Selection Notes

Select this component when a fixed delay period is required without external timing components. The manual reset feature allows for software-controlled system resets. Compare the 4.3 V threshold against the system's nominal voltage to ensure proper triggering. Consider the open-drain output interface for level shifting or wired-OR configurations in the circuit design.

Part Context

This part belongs to the BD45 series of voltage detectors manufactured by ROHM Semiconductor. It is specifically engineered for low-power applications requiring precise voltage monitoring. The BD45431G-TR variant includes the tape-and-reel packaging designation, suitable for automated surface-mount assembly processes.

Replacement Considerations

The BD5243G-1 is listed as a recommended replacement with the same package. Verify that the adjustable delay and lack of manual reset in the substitute do not conflict with design constraints.

FAQ

Does the BD45431G-TR include a watchdog timer?

No, the BD45431G-TR does not include a built-in watchdog timer.

What is the reset active state of the output?

The reset output is active low.