BD45325G-TR

Overview

The BD45325G-TR is a voltage detector from the ROHM BD45 series, designed for monitoring single power supply lines. It features a fixed detection threshold of 3.2V with an overvoltage threshold of 3.636V and hysteresis defined as VDET x 0.05. The device operates within a supply voltage range of 0.95V to 10V and includes a manual reset function. Key electrical parameters include a reset delay time of 50ms, accuracy of ±1%, and a maximum power dissipation of 540mW. It draws a typical static current of 800nA and supports an open-drain output capable of sinking 1.2mA at low voltage and sourcing 5mA at high voltage.

Feature Summary

• Provides precise under-voltage and over-voltage detection with a fixed 3.2V threshold and integrated hysteresis.

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Battery-powered systems needing low quiescent current supervision
• Industrial control units operating in wide temperature ranges

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity upon receipt, as the SSOP-5 form factor requires careful handling during inspection. Cross-reference datasheet revisions to ensure compatibility with existing design specifications before final procurement decisions.

Selection Notes

Select this component when a fixed 3.2V threshold with manual reset capability is required. Ensure the application environment stays within the -40°C to +105°C operating range. Verify that the open-drain output interface matches the downstream logic requirements without additional pull-up components beyond standard design practices.

Part Context

This part belongs to the BD45 series of supervisory circuits manufactured by ROHM Semiconductor. It utilizes an SSOP-5 surface-mount package suitable for space-constrained designs. The series focuses on providing reliable voltage monitoring solutions with low power consumption for various electronic applications.

Replacement Considerations

BD5232G-1TR is listed as a recommended replacement with the same SSOP-5 package. Note differences in reset delay adjustability and active state voltage ranges when substituting.

FAQ

Does the BD45325G-TR include a watchdog timer?

No, the BD45325G-TR does not feature a built-in watchdog timer; it functions solely as a voltage detector with manual reset capability.

What is the hysteresis voltage specification?

The hysteresis voltage is specified as VDET multiplied by 0.05, providing noise immunity around the detection threshold.