BD45302G-TR

Overview

The BD45302G-TR is a CMOS voltage detector with a fixed delay time, manufactured by ROHM Semiconductor. It features an open-drain output and manual reset capability. The typical under-voltage detection voltage is 3.0 V with ±1% precision. The reset active voltage range spans from 0.95 V to 10 V. The fixed reset delay timer is set at 200 msec. Circuit current consumption is 0.80 μA when on (at Vdet=4.8V) and 0.85 μA when off (at Vdet=4.8V). It operates within a temperature range of -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Fixed delay timer ensures consistent reset timing without external components.
• Manual reset function allows for immediate system recovery upon command.
• Open-drain output interface facilitates flexible logic level interfacing.

Applications

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

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the component status aligns with project lifecycle requirements, as availability may be limited. Ensure compatibility with existing board layouts regarding the SSOP-5 footprint and pin configuration.

Selection Notes

Select this component when a precise, fixed delay is required for system reset stability. The low current consumption makes it suitable for battery-operated applications. Verify that the 3.0 V detection threshold matches the target supply voltage. Consider the manual reset feature if immediate intervention is necessary during fault conditions.

Part Context

This part belongs to the BD45 series of voltage detectors from ROHM Semiconductor. These devices are designed for high accuracy and low power consumption. The BD45302G-TR specifically offers a fixed delay characteristic, distinguishing it from adjustable delay variants within the same family.

Replacement Considerations

The BD5230G-1 is listed as a similar level replacement with the same package. Note that the BD5230G-1 features an adjustable delay timer rather than a fixed one, which may require circuit modification.