BD4845G-TR

Overview

The BD4845G-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor. It features an open-drain output type and operates within a reset active voltage range of 0.95V to 10V. The device provides a typical under-voltage detection threshold of 4.5V with a precision of ±1%. It consumes 0.60µA in the ON state and 0.85µA in the OFF state at Vs=4.8V. The hysteresis voltage is defined as Vs x 0.05, and the low-level output current is 0.4mA. The component is housed in an SSOP5 package measuring 2.9x2.8mm with a thickness of 1.25mm.

Feature Summary

• Standard CMOS architecture designed for high-accuracy voltage monitoring
• Open-drain output configuration suitable for interfacing with various logic levels
• Ultra-low current consumption characteristics for power-sensitive applications

Applications

• Microcontroller system supervision
• Logic circuit power monitoring
• Battery backup switching circuits

Procurement Notes

Verify that the specific order matches the BD4845G-TR designation, as this part is designated as Not Recommended for New Designs (NRND). Confirm compatibility with the recommended replacement BD5245G-1TR if initiating new designs. Ensure the SSOP5 package dimensions align with existing PCB footprints. Check RoHS compliance status for environmental regulations. Validate supply availability through authorized distributors due to end-of-life status.

Selection Notes

Select this component only for maintenance or legacy system upgrades where the NRND status does not impact long-term viability. Compare electrical parameters against the BD5245G-1TR, which offers adjustable delay and improved current specs. Consider the fixed 4.5V threshold and lack of manual reset functionality. Evaluate the SSOP5 package constraints against available space. Assess the open-drain output requirements against system interface needs.

Part Context

This voltage detector belongs to ROHM's standard CMOS reset IC series, which includes variants like the BU48xx and BD47xx families. These devices are engineered for low-voltage detection ranges from 0.9V to 4.8V in 0.1V steps. The BD4845G-TR specifically targets applications requiring simple reset generation without complex timing features, utilizing a compact SSOP5 package similar to SOT-23-5 standards.

Replacement Considerations

The BD5245G-1TR is the officially recommended replacement. It shares the same SSOP5 package but offers adjustable reset delay and lower current consumption. Verify pinout compatibility before substitution.