BU4842G-TR

Supervisors Overview

The BU4842G-TR is a CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a single input channel with an open-drain output type and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 4.2 V with a precision accuracy of ±1%. It functions without manual reset or watchdog timer capabilities, maintaining a low static current consumption of approximately 500 nA. The component supports an operating temperature range from -40°C to +125°C and is housed in a compact SSOP-5 package.

Supervisors Feature Summary

• Provides precise monitoring of a single power supply rail using a dedicated voltage detection circuit.
• Generates a system reset signal via an open-drain output interface when the monitored voltage falls below the set threshold.
• Operates effectively across a wide industrial temperature range while maintaining minimal quiescent current draw.

Supervisors Applications

• Embedded systems requiring reliable power-on reset sequencing
• Microcontroller unit (MCU) power supervision circuits
• Battery-operated devices needing low-power voltage monitoring

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as this part number is marked as obsolete or not recommended for new designs. Confirm that the specific ordering suffix matches the required reel packaging specifications. Ensure compatibility with existing PCB footprints before procurement, considering potential lead times for remaining stock or alternative sourcing channels.

Supervisors Selection Notes

Select this component when a fixed 4.2 V threshold is required for single-channel voltage supervision. Consider the open-drain output configuration for flexible logic level interfacing. Evaluate the SSOP-5 package dimensions against available board space constraints. Review thermal performance requirements to ensure operation within the specified -40°C to +125°C range.

Supervisors Part Context

This component belongs to the BU4842 series of standard voltage detectors produced by ROHM Semiconductor. It is part of a broader family of PMIC supervisory circuits designed for general-purpose electronic applications. The series typically offers various threshold voltages to accommodate different system requirements while maintaining consistent package and electrical characteristics.

Supervisors Replacement Considerations

The BD5242G-1TR is documented as a similar replacement option with the same SSOP-5 package. Verify functional equivalence regarding threshold voltage and output configuration before substitution.