BU4946F-TR

Supervisors Overview

The BU4946F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features a typical 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 supports a maximum supply voltage of 7V. It utilizes an SOP-4 package and functions reliably across a temperature range of -40°C to 125°C. The component draws a circuit current of 0.40μA in the ON state and 0.55μA in the OFF state at VDET=4.8V, with hysteresis set at VDET x 0.05.

Supervisors Feature Summary

• CMOS technology ensures low power consumption for battery-operated applications.
• Provides precise voltage monitoring with fixed threshold detection capabilities.
• Compact surface-mount packaging facilitates integration into space-constrained designs.

Supervisors Applications

• Portable electronic devices requiring efficient power management
• Battery-powered equipment needing reliable voltage supervision
• General-purpose industrial control systems

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm package integrity and pin alignment against official datasheet specifications before implementation. Ensure compliance with RoHS directives as indicated in product documentation. Validate thermal performance within specified operating ranges during system integration testing.

Supervisors Selection Notes

Select this component when a fixed 4.6V threshold is required without manual reset functionality. Consider the SOP-4 package constraints for PCB layout. Evaluate the CMOS output characteristics against load requirements. Compare power consumption metrics with alternative supervisors if extended battery life is critical. Verify compatibility with system voltage levels within the 0.7V to 7V reset range.

Supervisors Part Context

This part belongs to the BU4946 series of standard voltage detectors from ROHM Semiconductor. It is positioned as a cost-effective solution for basic supervisory tasks. The series emphasizes simplicity with no additional features like watchdog timers or adjustable delays. It serves legacy designs transitioning to more compact packages while maintaining established electrical characteristics.

Supervisors Replacement Considerations

BD5246G-1TR is listed as a similar specification replacement with SSOP-5 packaging and open-drain output. BD5246G-1 offers comparable threshold accuracy but requires pinout adaptation. Verify functional equivalence regarding output drive strength and reset timing before substitution.