BU4946G-TR

Supervisors Overview

The BU4946G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features a CMOS output type with a typical detection threshold of 4.6V and a precision of ±1%. The device operates within a supply voltage range of 0.7V to 7V and supports a reset active voltage range from 0.7V to 7V. It exhibits low circuit current consumption, specified at 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. The component provides hysteresis equal to VDET x 0.05 and offers L-output currents of 3.3mA (Low) and 6.5mA (High). It is housed in an SSOP5 package (SOT23-5 equivalent, 2.9x2.8mm) and functions across a temperature range of -40°C to 125°C.

Supervisors Feature Summary

• CMOS output architecture providing push-pull/totem pole drive capabilities without manual reset or watchdog timer integration.
• High accuracy voltage detection with ±1% precision and defined hysteresis to prevent output oscillation near the threshold.
• Extended operational temperature range supporting industrial applications from -40°C to +125°C ambient conditions.

Supervisors Applications

• Monitoring 5V logic power rails in embedded systems
• Supervising battery-powered devices requiring precise under-voltage detection
• Industrial control circuits operating in wide temperature environments

Supervisors Procurement Notes

Verify the specific suffix 'G' corresponds to the SSOP5 package variant when sourcing replacements. Confirm that the 'TR' designation indicates tape-and-reel packaging if reel quantity handling is required. Check RoHS compliance status as indicated in official documentation. Ensure the obsolete status does not conflict with long-term availability requirements for your production cycle.

Supervisors Selection Notes

Select this component when a fixed 4.6V threshold with high precision is required for single-supervision tasks. The CMOS output allows direct interfacing with digital logic inputs. Consider the low standby current for power-sensitive designs. Verify that the SSOP5 footprint matches your PCB layout constraints compared to alternative packages like SOT23-5.

Supervisors Part Context

This part belongs to the BU4946 series of standard voltage detectors. It serves as a dedicated supervisory circuit for maintaining system stability during power fluctuations. The device integrates internal comparators and reference voltage sources to detect undervoltage conditions without external timing components.

Supervisors Replacement Considerations

BD5246G-1TR is documented as a same-package replacement with similar detection levels but different output characteristics (Open Drain vs CMOS).