{"schemaVersion":1,"slug":"binary-decoder-demultiplexer","name":"Binary decoder / demultiplexer","kind":"symbol","abbreviation":"DEC","aliases":["binary decoder","demultiplexer","one of many selection"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses binary selection and enable conditions to activate the documented selected output.","description":["Uses binary selection and enable conditions to activate the documented selected output.","On a schematic, identify the binary address inputs, enable polarities and output active level and trace the selected output channels and destination mapping. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A decoder and a demultiplexer can share a device implementation; this record combines those uses rather than counting the same hardware twice.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the binary address inputs, enable polarities and output active level.","Trace the selected output channels and destination mapping."],"drawingChecklist":["Label the binary address inputs, enable polarities and output active level.","Cross-reference the selected output channels and destination mapping.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A decoder and a demultiplexer can share a device implementation; this record combines those uses rather than counting the same hardware twice.","facts":[{"label":"Common schematic mnemonic","value":"DEC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The binary address inputs, enable polarities and output active level"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc138","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["digital-multiplexer","plc-io"],"artwork":"electronics-logic-decoder","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/binary-decoder-demultiplexer","illustration":{"url":"https://eloragrid.ai/library/illustrations/binary-decoder-demultiplexer.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-hc138","title":"SN74HC138 — binary decoding and demultiplexing","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc138.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of binary decoding and demultiplexing. 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."}]}