BU4826G-TR

Supervisors Overview

The BU4826G-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed under-voltage detection threshold of 2.6 V with a precision of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and consumes a typical operating current of 550 nA at VDET=4.8V. It provides an open-drain output with a low active reset state. The component is housed in an SSOP-5 package and supports an adjustable reset delay timer. It functions reliably across an extended temperature range from -40°C to +125°C.

Supervisors Feature Summary

• CMOS technology ensures high accuracy and low power consumption for battery-operated systems.
• Fixed 2.6 V detection threshold allows precise monitoring of specific voltage rails.
• Open-drain output interface facilitates direct connection to microprocessor reset lines.

Supervisors Applications

• Microprocessor system reset circuits
• Battery voltage monitoring in portable devices
• Power supply supervision for embedded controllers

Supervisors Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before procurement, as this indicates the component is being phased out. Confirm that the SSOP-5 package dimensions match the target PCB footprint. Ensure the open-drain output configuration aligns with the downstream logic requirements. Check for RoHS compliance documentation if environmental regulations apply to the final assembly.

Supervisors Selection Notes

Select this part when a fixed 2.6 V threshold is required without external resistor networks. Consider the 550 nA quiescent current for low-power designs. The absence of a manual reset or watchdog timer simplifies the design but limits functionality compared to more complex supervisors. Verify that the 7 V maximum input voltage accommodates potential transient spikes in the application environment.

Supervisors Part Context

This component belongs to the BU48xx series of standard voltage detectors. The series offers various detection voltages from 0.9 V to 4.8 V in 0.1 V increments. The BU4826G-TR specifically targets the 2.6 V market segment, providing a cost-effective solution for single-channel voltage supervision in consumer and industrial electronics.

Supervisors Replacement Considerations

The BD5226G-1TR is listed as a recommended replacement with the same SSOP-5 package. Note that the substitute features an adjustable delay timer and slightly different electrical characteristics, requiring schematic review during migration.