{"schemaVersion":1,"slug":"logic-xnor-gate","name":"Exclusive-NOR gate","kind":"symbol","abbreviation":"XNOR","aliases":["exclusive NOR","equality gate"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"For two positive-logic inputs, produces a true output when the input states are equal.","description":["For two positive-logic inputs, produces a true output when the input states are equal.","On a schematic, identify the compared input signals and the output driver type and trace the equality output and any required external pull-up. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","XNOR specifies a logical function; an open-drain implementation is a separate electrical output characteristic.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the compared input signals and the output driver type.","Trace the equality output and any required external pull-up."],"drawingChecklist":["Label the compared input signals and the output driver type.","Cross-reference the equality output and any required external pull-up.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"XNOR specifies a logical function; an open-drain implementation is a separate electrical output characteristic.","facts":[{"label":"Common schematic mnemonic","value":"XNOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The compared input signals and the output driver type"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc266","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xor-gate","plc-io"],"artwork":"electronics-gate-xnor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-xnor-gate","illustration":{"url":"https://eloragrid.ai/library/illustrations/logic-xnor-gate.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-electronics-ti-hc266","title":"SN74HC266 — XNOR gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc266.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of xnor gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}]}