BU4917F-TR

Supervisors Overview

The BU4917F-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features a fixed under-voltage detection threshold of 1.7V 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 a CMOS output type with a low active state and includes hysteresis defined as VDET x 0.05. The circuit consumes typical currents of 0.40µA (ON) and 0.55µA (OFF) at VDET=4.8V. It functions reliably across an industrial temperature range of -40°C to +125°C and is housed in a compact SOP4 package.

Supervisors Feature Summary

• CMOS output architecture providing low active state signaling
• High accuracy voltage detection with ±1% precision
• Ultra-low current consumption for extended battery life
• Integrated hysteresis to prevent output oscillation

Supervisors Applications

• Portable electronic devices requiring low standby current
• Microprocessor system power supply supervision
• Battery-operated equipment voltage monitoring
• General-purpose voltage level detection circuits

Supervisors Procurement Notes

Verify the specific suffix 'F' against the manufacturer's latest documentation to confirm pinout and electrical characteristics, as suffixes often denote package or thermal variations. Confirm RoHS compliance status directly with the supplier, as regulatory updates may affect ordering part numbers. Ensure the SOP4 package dimensions match the target PCB footprint requirements before finalizing procurement.

Supervisors Selection Notes

Select this component when a fixed 1.7V threshold is required without external resistor networks. The CMOS output is suitable for direct interfacing with digital logic inputs. Consider the ±1% tolerance for critical applications where precise voltage margins are necessary. Evaluate the 0.7V to 7V reset range compatibility with the system's operating voltage levels.

Supervisors Part Context

This part belongs to the BU49xx series of standard CMOS voltage detectors. The series offers various detection voltages in 0.1V steps and different output types. The BU4917F specifically provides a 1.7V threshold in a small SOP4 package, distinguishing it from open-drain variants like the BU48xx series which may have different output structures.

Supervisors Replacement Considerations

BD5217G-1 is listed as a similar specification replacement with comparable detection voltage and precision, though it uses an SSOP5 package and open-drain output.