BD5238G-TR

Overview

The BD5238G-TR is a CMOS reset IC from the ROHM Nano Energy series, designed for under-voltage detection with a typical threshold of 3.8V. It features an adjustable reset delay timer set via an external capacitor and provides an N-channel open-drain output. The device operates within a supply voltage range of 0.8V to 6V and maintains high accuracy with a detection voltage precision of ±2.5%. It consumes ultra-low current, typically 0.23µA in active mode and 0.27µA in standby. The component is housed in a compact SSOP-5 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Ultra-low power consumption suitable for battery-operated applications
• Adjustable reset delay time using an external capacitor
• High-precision voltage detection with narrow tolerance
• Compact surface-mount packaging for space-constrained designs

Applications

• Portable electronic devices requiring extended battery life
• Microcontroller system supervision
• Embedded systems monitoring power rails
• Automotive electronics supporting functional safety analysis

Procurement Notes

Verify the specific suffix 'G' confirms the RoHS compliant version. Confirm the '-TR' indicates tape and reel packaging if required for automated assembly. Check current lifecycle status as some variants may be marked NRND. Ensure the design accounts for the external capacitor needed for delay adjustment. Validate that the open-drain output configuration matches the target circuit logic requirements.

Selection Notes

Select this component when low quiescent current is critical for system efficiency. Choose the BD5238G-TR over fixed-delay alternatives if application timing requires flexibility through external capacitance. Ensure the 3.8V detection threshold aligns with the monitored rail's minimum operational voltage. Consider the SSOP-5 footprint constraints during PCB layout. Verify compatibility with the target microcontroller's input requirements given the open-drain output structure.

Part Context

This part belongs to the BD52xx-2M series of voltage detectors from ROHM Semiconductor. These ICs integrate high-precision CMOS detection circuits with low-power characteristics. The series is engineered for applications demanding minimal standby current while maintaining reliable supervision of power supplies in consumer and automotive environments.

Replacement Considerations

The BD53E38G is listed as a similar level replacement with the same pinout but offers different electrical specifications including higher current consumption and CMOS output instead of open-drain.