BD4859G-TR

Overview

The BD4859G-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features an open-drain output type and monitors a single input channel with a typical under-voltage detection threshold of 5.9V. The device offers high precision with a Vdet accuracy of ±1% and includes hysteresis defined as Vdet multiplied by 0.05. It operates within a reset active voltage range of 0.95V to 10V. The component supports manual reset functionality and lacks a watchdog timer or battery backup switch. It is housed in an SSOP-5 package and is available in tape and reel packaging.

Feature Summary

• High-precision voltage monitoring with ±1% detection accuracy
• Open-drain output configuration for flexible interfacing
• Integrated hysteresis to prevent output oscillation during threshold transitions

Applications

• Processor supervisor circuits requiring precise voltage tracking
• General-purpose voltage monitoring in embedded systems
• Power management supervision where manual reset is acceptable

Procurement Notes

Verify the specific suffix 'G' indicates the SSOP-5 package variant when sourcing. Confirm RoHS compliance status through official datasheets prior to integration. Ensure the supply chain source provides valid manufacturer documentation to guarantee authenticity. Check for any end-of-life notices or last-time-buy recommendations associated with this specific part number revision before finalizing procurement plans.

Selection Notes

Select this component when a fixed 5.9V detection threshold is required for system supervision. The open-drain output allows compatibility with various logic levels up to the maximum supply voltage. Consider the absence of a watchdog timer if automated recovery from software faults is necessary. The SSOP-5 package suits space-constrained designs compared to larger footprints.

Part Context

This part belongs to the BD48 series of standard voltage detectors. It shares functional similarities with other members like the BD4853FVE-TR but differs in detection voltage and package type. The BD4859G-TR specifically targets applications needing a higher voltage threshold than the 2.3V-6.0V range common in some low-voltage variants, offering robust supervision for mid-range power rails.

Replacement Considerations

BD4859G-TR is listed as a similar level replacement for BD4859G. For alternative packages, BD5250G-TR is noted as a recommended package option with similar specifications.