BU4246F-TR

Overview

The BU4246F-TR is a CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It features an adjustable reset delay timer and an open-drain output type that activates at a low state. The device operates within a wide supply voltage range of 0.7 V to 7 V, with a typical under-voltage detection threshold of 4.6 V and a precision of ±1%. It consumes minimal current, specified as 0.40 μA when active and 0.55 μA when off at Vdet=4.8V. The component is housed in an SSOP-5 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Adjustable reset delay timer functionality allows customization of the reset pulse width.
• Open-drain output structure provides flexibility for interfacing with various logic families.
• Low power consumption characteristics support battery-operated applications.
• Wide operating voltage range ensures compatibility with diverse power supply systems.

Applications

• Microprocessor system reset circuits
• Battery-powered device power management
• Portable equipment voltage supervision

Procurement Notes

Verify end-of-life status before integration, as this component may be discontinued or restricted to last-time buys. Confirm RoHS compliance and specific ordering suffixes match design requirements. Check for authorized distributors offering remaining stock or qualified alternatives. Ensure ECAD models are updated for accurate PCB layout implementation.

Selection Notes

Select this part when an adjustable delay time is required for reset timing control. Compare against similar level parts like BD5246G-1 for potential pin-compatible upgrades. Evaluate current consumption specs against system power budgets. Verify that the open-drain output configuration aligns with the target microcontroller input requirements.

Part Context

This component belongs to the BU42xx series of voltage detectors from ROHM. It shares functional similarities with other members of the family but is distinguished by its specific 4.6 V detection threshold and adjustable delay feature. The series is widely used in industrial and consumer electronics for reliable power supervision.

Replacement Considerations

The BD5246G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameter compatibility, particularly the reset delay adjustability and output drive capabilities, before substituting.