{"schemaVersion":1,"slug":"parallel-in-serial-out-register","name":"Parallel-in serial-out register","kind":"symbol","abbreviation":"PISO","aliases":["parallel to serial register","PISO shift register"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Loads a parallel word and presents its bits through a serial shift output.","description":["Loads a parallel word and presents its bits through a serial shift output.","On a schematic, identify the parallel inputs, load control and shift clock and trace the serial data output and bit-order convention. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","PISO serialises a parallel state; it is not the reverse pin connection of an arbitrary SIPO part.","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 parallel inputs, load control and shift clock.","Trace the serial data output and bit-order convention."],"drawingChecklist":["Label the parallel inputs, load control and shift clock.","Cross-reference the serial data output and bit-order convention.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"PISO serialises a parallel state; it is not the reverse pin connection of an arbitrary SIPO part.","facts":[{"label":"Common schematic mnemonic","value":"PISO — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The parallel inputs, load control and shift clock"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc165","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["serial-in-parallel-out-register","plc-io"],"artwork":"electronics-memory-piso","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/parallel-in-serial-out-register","illustration":{"url":"https://eloragrid.ai/library/illustrations/parallel-in-serial-out-register.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-hc165","title":"SN74HC165 — parallel-load serial shift storage","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc165.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of parallel-load serial shift storage. 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."}]}