U+2391 "⎑" Passive-Pull-down-Output Symbol Unicode Character

U+2391 "⎑" Passive-Pull-down-Output Symbol is a graphical symbol used in electrical or electronic schematics and logic circuit diagrams to represent a specific type of output stage. It depicts a passive pull-down configuration, meaning that the output is typically pulled to a low voltage state or logic zero through a resistor or similar passive component when the driving device is not actively forcing it high. This symbol helps engineers and technicians identify outputs that rely on an external or internal load to sink current rather than actively driving a high signal. Its inclusion in Unicode aids in the clear digital representation of such technical diagrams without needing specialized fonts.