BU4846F-TR

Supervisors Overview

The BU4846F-TR is a standard voltage detector IC manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It features an under-voltage detection threshold of 4.6V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes an open-drain output type. Key electrical parameters include a circuit current of 0.40μA when ON (at VDET=4.8V) and 0.55μA when OFF. Hysteresis is set at VDET x 0.05. The component supports a low-level reset active state without manual reset or watchdog timer functions. It is housed in a SOP4 package and complies with RoHS standards.

Supervisors Feature Summary

• CMOS technology implementation for low power consumption
• Open-drain output configuration for flexible interfacing
• Fixed under-voltage detection threshold functionality
• RoHS compliant manufacturing process

Supervisors Applications

• Power supply voltage monitoring systems
• Embedded system supervision circuits
• Consumer electronics power management
• Industrial control unit voltage tracking

Supervisors Procurement Notes

Verify the obsolete status of this component before procurement planning. The BU4846F-TR is listed as discontinued with no new design recommendations. Confirm availability through last-time-buy channels if existing inventory is required. Ensure compatibility with replacement parts such as BD5246G-1TR for future designs. Check regional distribution restrictions as some suppliers may not offer this part in all locations. Validate package specifications against current board layouts.

Supervisors Selection Notes

Select this component only for legacy system maintenance or specific last-time-buy requirements due to its discontinued status. Consider the fixed 4.6V threshold and lack of adjustable delay features when evaluating suitability. Compare performance metrics against recommended replacements like the BD5246G-1 series for new projects. Assess package size constraints and operating temperature ranges (-40°C to 125°C). Verify that the open-drain output meets interface requirements without additional pull-up components.

Supervisors Part Context

The BU4846F-TR belongs to ROHM's standard voltage detector family, specifically engineered for simple reset generation based on monitored voltage levels. It serves as a critical supervisory element in ensuring system stability during power fluctuations. The device represents an earlier generation of voltage detectors with fixed thresholds and basic output configurations. Its discontinuation reflects the manufacturer's shift towards more advanced or pin-compatible alternatives within the same product line.

Supervisors Replacement Considerations

The BD5246G-1TR is documented as a similar specification replacement with a recommended status. This substitute offers comparable detection voltage but differs in package type (SSOP5 vs SOP4) and includes adjustable delay features. Evaluate pinout compatibility and functional differences before substitution.