The 203221-M51945BFP#CF0R is a voltage detector integrated circuit (IC) in the power management category.

• Function: Monitors and detects voltage levels in electronic systems.
• Output: Open drain or open collector for flexible component connections.
• Features: Non-programmable, active-low reset function, voltage threshold of 1.25V.
• Package: 8-SOIC for surface mount installation.
• Manufacturer: Renesas Electronics America.
• Status: Obsolete.
• Caution: 42% chance of counterfeit versions in the open market; verify authenticity before purchase.