BD4838G-TR

Overview

The BD4838G-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed under-voltage detection threshold of 3.8 V with a precision of ±1%. The device operates within a supply voltage range of 0.95 V to 10 V and consumes low current, typically 0.60 μA in active mode and 0.85 μA in standby mode at VS=4.8 V. It utilizes an open-drain output type without manual reset or watchdog timer functions. The component is housed in an SSOP-5 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• CMOS technology ensures low power consumption for battery-operated systems.
• Fixed 3.8 V detection threshold provides precise voltage monitoring.
• Open-drain output simplifies interface with various logic families.

Applications

• Portable electronic devices requiring voltage supervision
• Battery-powered equipment monitoring
• General-purpose system reset circuits

Procurement Notes

Verify the supply status as the BD4838G is listed as Not Recommended for New Designs (NRND). Confirm availability through authorized distributors for existing production needs. Ensure compatibility with SSOP-5 footprint requirements during procurement planning.

Selection Notes

Select this component when a fixed 3.8 V threshold is required without adjustable settings. Consider the NRND status for long-term projects. Verify that the open-drain output configuration meets system logic level requirements. Check if the absence of a watchdog timer aligns with application safety needs.

Part Context

Part of the BD48 series standard voltage detectors. Similar level replacement includes BD5238G-1, which offers comparable functionality with slight variations in precision and operating voltage range. Both share the SSOP-5 package format.

Replacement Considerations

BD5238G-1 is a similar level replacement with the same package. Verify operating voltage range differences (0.8 V to 6 V vs 0.95 V to 10 V) and precision changes (±0.9% vs ±1%) before substitution.