BU4240G-TR

Overview

The BU4240G-TR is a CMOS voltage detector manufactured by Rohm Semiconductor, designed for supervisory circuit applications. It features a fixed detection threshold of 4V with a precision of ±1%. The device operates within a supply voltage range of 0.7V to 7V and supports an adjustable reset delay timer. It provides a low-active open-drain output without manual reset or watchdog functionality. The component is housed in a compact 5-SSOP package and is rated for operation across a temperature range of -40°C to +125°C.

Feature Summary

• Provides precise voltage monitoring with a fixed 4V detection threshold and ±1% accuracy.
• Features an adjustable reset delay timer to manage system startup sequences.
• Delivers a low-active open-drain output signal for direct interface with digital logic.

Applications

• Microprocessor reset circuits
• Battery-powered equipment supervision
• Portable instrument power management

Procurement Notes

Verify the current lifecycle status before procurement, as this component may be classified as obsolete or not recommended for new designs. Confirm that the 5-SSOP package and 4V threshold align with existing schematic requirements. Ensure compatibility with the target operating temperature range and supply voltage specifications during integration planning.

Selection Notes

Select this component when a fixed 4V threshold is required for voltage supervision. The adjustable delay feature allows customization of reset timing via external components. Consider the open-drain output configuration for level shifting needs. Evaluate the ±1% precision against system tolerance requirements. Verify availability given potential end-of-life status.

Part Context

This part belongs to the BU42xx series of voltage detectors from Rohm Semiconductor. It shares functional similarities with other models in the family but is distinguished by its specific 4V detection threshold. The series generally offers low power consumption and compact packaging solutions for portable electronics.

Replacement Considerations

The BD5240G-1 is identified as a replacement with the same pinout and package. It offers similar electrical characteristics including a 4V threshold and adjustable delay. Verify operational limits and current consumption differences during substitution.