BU4244F-TR

Overview

The BU4244F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features an under-voltage detection threshold of 4.4 V with a precision of ±1%. The reset active voltage range spans from 0.7 V to 7 V. The device utilizes an open-drain output type and provides an adjustable delay timer with a low reset active state. It does not include manual reset or watchdog timer functions. The circuit current is 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. It operates within a temperature range of -40°C to 125°C and is housed in a SOP4 package.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• Open-drain output configuration supporting flexible interfacing
• Wide reset active voltage range accommodating various supply levels

Applications

• Microprocessor system supervision
• Battery-powered device monitoring
• General-purpose voltage monitoring circuits

Procurement Notes

Verify the specific suffix and package variant against the official datasheet, as ordering part numbers may differ. Confirm RoHS compliance status and check for end-of-life notifications, as this component may be subject to discontinuation. Ensure the selected variant matches the required operating temperature range and electrical specifications for the target application.

Selection Notes

Select this component when an adjustable delay timer is required for reset sequencing. Compare the 4.4 V threshold and ±1% precision against system requirements. Consider the SOP4 package size and open-drain output characteristics. Evaluate the low standby current consumption for power-sensitive designs. Verify compatibility with the intended voltage range and environmental conditions.

Part Context

This component belongs to the BU42xx series of voltage detectors from ROHM Semiconductor. These devices are designed for supervisory applications requiring precise voltage monitoring and configurable reset delays. The series typically offers low power consumption and compact packaging options suitable for portable electronics and industrial control systems.

Replacement Considerations

BD5244G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameter compatibility and package differences before substitution.