The BU4229G-TR with Supervisory Circuits CMOS Low Volt Detect is a voltage monitor IC manufactured by ROHM. It is a voltage monitor IC that detects the voltage drop in a power supply to prevent malfunctions in systems that require a stable power supply. It is features trigger circuits and reset circuits, and dual built-in hysteresis voltages that are adjustable with external components. It has high detection accuracy (ability to detect low voltages with a wide operating range), low power consumption, and is suitable for low-voltage power supplies. It is housed in a range of industry-standard surface mount packages and is suitable for use in a range of applications, including PCs, hard disks, portable handheld devices, and audio and video equipment.