U+2391 "⎑" Passive-Pull-down-Output Symbol Unicode Character
Unicode Version 17.0
⎑
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.
General Properties
| Code Point | U+2391 |
| Version Added | 3.0 |
| Name | Passive-Pull-down-Output Symbol |
| Block | Miscellaneous Technical |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⎑ |
| HTML Hex Encoding | ⎑ |
| UTF-8 Encoding | 0xE2 0x8E 0x91 |
| UTF-16 Encoding | 0x2391 |
| UTF-32 Encoding | 0x00002391 |
| C/C++/Java Escape | \u2391 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |