BD45442G-TR

Overview

The BD45442G-TR is a voltage detector from the BD45xxx series manufactured by Rohm Semiconductor. It features a fixed detection threshold of 4.4V with ±1% accuracy and a fixed reset delay time of 200ms. The device operates within a supply voltage range of 0.95V to 10V and supports manual reset functionality via an open-drain output. It is housed in a 5-pin SSOP package (SC-74A/SOT-753) and functions across a temperature range of -40°C to 105°C.

Feature Summary

• Provides precise voltage monitoring with a fixed 4.4V detection threshold and high accuracy.
• Includes a fixed 200ms reset delay timer to ensure stable power-up sequences.
• Supports manual reset input for controlled system recovery operations.
• Delivers low quiescent current consumption suitable for battery-powered applications.

Applications

• Processor supervisor circuits requiring reliable voltage monitoring
• Battery backup switching systems with fixed delay requirements
• Embedded systems needing manual reset capability
• General supervisory circuits for microcontrollers

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin compatibility during replacement planning. Check RoHS compliance documentation for regulatory adherence. Validate thermal performance within specified operating ranges. Ensure substitute components match electrical specifications precisely.

Selection Notes

Evaluate fixed delay characteristics against system startup timing requirements. Compare quiescent current levels with power budget constraints. Assess manual reset necessity versus automatic recovery options. Verify package dimensions for PCB layout compatibility. Consider temperature range suitability for environmental conditions.

Part Context

This component belongs to Rohm's BD45 series of voltage detectors, designed for supervisory applications. It offers a balance of precision and simplicity with fixed parameters. The series targets cost-sensitive designs requiring reliable power management without complex configuration needs.

Replacement Considerations

BD5244G-1TR is listed as a recommended replacement with similar package and detection voltage. Note that the alternative features adjustable delay rather than fixed 200ms delay. Verify functional equivalence before implementation.

FAQ

What is the reset delay time specification?

The BD45442G-TR has a fixed reset delay time of 200ms.

Does this component support manual reset?

Yes, the device includes a manual reset function for controlled system recovery.

What is the detection voltage accuracy?

The detection voltage accuracy is specified as ±1%.