BU4817F-TR

Supervisors Overview

The BU4817F-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features an open-drain output with a low-active reset signal and operates within a detection voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is set at 1.7 V with a precision of ±1%. The device consumes a circuit current of 0.40 μA when active and 0.55 μA when off, measured at Vdet=4.8V. It includes hysteresis voltage defined as Vdet x 0.05 and functions across a temperature range of -40°C to +125°C. Packaged in SOP-4, this component is currently designated as end-of-life.

Supervisors Feature Summary

• Provides reliable supervision of single-input voltage levels using CMOS technology.
• Delivers a low-active reset signal via an open-drain output interface.
• Incorporates internal hysteresis to prevent output oscillation during voltage transitions.
• Operates efficiently with ultra-low standby and active current consumption.

Supervisors Applications

• Monitoring battery-powered systems requiring precise voltage thresholds.
• Supervising microprocessor and memory power rails for system stability.
• Industrial control units operating in extended temperature environments.
• Consumer electronics requiring compact surface-mount voltage supervision.

Supervisors Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement, as the BU4817F-TR indicates a tape-and-reel configuration. Confirm that the end-of-life status aligns with long-term production requirements. Ensure compatibility with existing PCB footprints for the SOP-4 package. Cross-reference the exact detection voltage tolerance and operating temperature range with the target application specifications to guarantee performance reliability under all expected conditions.

Supervisors Selection Notes

Select the BU4817F-TR when a fixed 1.7 V detection threshold meets the system's voltage monitoring needs. Consider this component for designs prioritizing minimal power consumption in both active and inactive states. The open-drain output requires an external pull-up resistor, which must be accounted for in the circuit design. Verify that the SOP-4 package dimensions fit within the available board space constraints compared to alternative SSOP packages.

Supervisors Part Context

The BU4817F-TR belongs to the BU48xx series of standard voltage detectors from ROHM Semiconductor. This series focuses on providing cost-effective and compact solutions for power management applications. The 'F' designation typically corresponds to the SOP-4 package format, distinguishing it from other variants like the G-series which may utilize different housing styles. The product line emphasizes low current draw and high accuracy for sensitive electronic circuits.

Supervisors Replacement Considerations

The BD5217G-1 is listed as a similar specification replacement with identical detection voltage and package type. Verify pinout compatibility and electrical characteristics before substitution. Note that the BD5217G-1 is recommended for new designs while the BU4817F-TR is end-of-life.