HD3SS3212RKSR

{
  "slug": "hd3ss3212rksr",
  "version": "0.1.3",
  "type": "component",
  "tags": [
    "component",
    "interface",
    "hd3ss3212rksr",
    "board-derived"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
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    "page.json",
    "README.md",
    "verification.json",
    "hd3ss3212rksr.kicad_sym",
    "hd3ss3212rksr.kicad_mod",
    "hd3ss3212rksr-etched.glb",
    "hd3ss3212rksr-etched.step",
    "hd3ss3212rksr.glb",
    "hd3ss3212rksr.step",
    "hd3ss3212rksr.lbr",
    "docs/hero.png",
    "docs/hd3ss3212rksr-datasheet.pdf",
    "hd3ss3212rksr-hero.glb",
    "hd3ss3212rksr-hero.overlay.json"
  ],
  "component": {
    "mpn": "HD3SS3212RKSR",
    "manufacturer": "Texas Instruments",
    "package": "TQFN-20-EP(2.5x4.5)",
    "pin_count": 21,
    "category": "Interface",
    "subcategory": "Analog Switches - Special Purpose",
    "datasheet": "https://www.ti.com/lit/ds/symlink/hd3ss3212.pdf",
    "parts": {
      "symbol": "hd3ss3212rksr.kicad_sym",
      "footprint": "hd3ss3212rksr.kicad_mod",
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      "model_3d_plain": "hd3ss3212rksr-etched.glb",
      "model_3d_step": "hd3ss3212rksr-etched.step",
      "model_3d_step_plain": "hd3ss3212rksr.step",
      "lbr": "hd3ss3212rksr.lbr"
    },
    "distributor_links": {
      "digikey": {
        "part": "296-42174-2-ND",
        "url": "https://www.digikey.com/en/products/detail/texas-instruments/HD3SS3212RKSR/5278905"
      },
      "mouser": {
        "part": "595-HD3SS3212RKSR",
        "url": "https://www.mouser.com/en/ProductDetail/Texas-Instruments/HD3SS3212RKSR?qs=GURawfaeGuCmQa5mgNd%252ByQ%3D%3D"
      },
      "lcsc": {
        "part": "C129320",
        "url": "https://www.lcsc.com/product-detail/C129320.html"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RSVD1",
        "type": "output",
        "description": "Reserved. Can be left not connected or can be fed to VCC. [datasheet p.5]"
      },
      {
        "number": "2",
        "name": "OEn",
        "type": "input",
        "description": "Active-low chip enable. L: normal operation. H: shutdown. [datasheet p.4]"
      },
      {
        "number": "3",
        "name": "A0p",
        "type": "bidirectional",
        "description": "Port A, channel 0, high-speed positive signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "4",
        "name": "A0n",
        "type": "bidirectional",
        "description": "Port A, channel 0, high-speed negative signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground. [datasheet p.4]"
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "3.3-V power. [datasheet p.4]"
      },
      {
        "number": "7",
        "name": "A1p",
        "type": "bidirectional",
        "description": "Port A, channel 1, high-speed positive signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "8",
        "name": "A1n",
        "type": "bidirectional",
        "description": "Port A, channel 1, high-speed negative signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "9",
        "name": "SEL",
        "type": "input",
        "description": "Port select pin. L: Port A to Port B. H: Port A to Port C. [datasheet p.4]"
      },
      {
        "number": "10",
        "name": "RSVD2",
        "type": "output",
        "description": "Reserved. Can be left not connected or can be fed to VCC. [datasheet p.5]"
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground. [datasheet p.4]"
      },
      {
        "number": "12",
        "name": "C1n",
        "type": "bidirectional",
        "description": "Port C, channel 1, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "13",
        "name": "C1p",
        "type": "bidirectional",
        "description": "Port C, channel 1, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "14",
        "name": "C0n",
        "type": "bidirectional",
        "description": "Port C, channel 0, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "15",
        "name": "C0p",
        "type": "bidirectional",
        "description": "Port C, channel 0, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "16",
        "name": "B1n",
        "type": "bidirectional",
        "description": "Port B, channel 1, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "17",
        "name": "B1p",
        "type": "bidirectional",
        "description": "Port B, channel 1, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "18",
        "name": "B0n",
        "type": "bidirectional",
        "description": "Port B, channel 0, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4]"
      },
      {
        "number": "19",
        "name": "B0p",
        "type": "bidirectional",
        "description": "Port B, channel 0, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected (footnote, p.4). [datasheet p.5]"
      },
      {
        "number": "20",
        "name": "GND",
        "type": "power_in",
        "description": "Ground. [datasheet p.4]"
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed thermal pad (not listed in the Pin Functions table). Must be connected to ground and soldered to the PCB for thermal and mechanical performance (RKS0020A note 3, p.20). [datasheet p.14]"
      }
    ],
    "provenance": {
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/hd3ss3212.pdf",
        "pages": 27,
        "sha256": "111def72b5f44bae3da73790745ede7645aed4eb92445885ff610b459beb42c2",
        "source_tier": "mfr",
        "retrieved": "2026-10-27",
        "edition": "SLASE74F, revised September 2016"
      },
      "cad": "Footprint and symbol as used on Adom board designs; 3D model: KiCad library 3D model WQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x2.9mm (CC-BY-SA 4.0 with the KiCad library exception)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      },
      "build": {
        "tool": "board-derived part page builder 0.1: one-off Claude session scripts in Caleb Taylor's container (retired; not the Adom parts factory)",
        "pins": "KiCad symbol from the source board + adom-ds2sf datasheet extraction (claude-opus-4-7)",
        "at": "2026-10-09"
      }
    },
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        "origin": "footprint origin",
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        "footprint_binding": "identity",
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        "checked": "2026-10-09",
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      },
      {
        "file": "hd3ss3212rksr-etched.step",
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        "sha256": "17511b6eeb9a40653985c6edb60b71078b028121b9e0d07f3325fadcad609384",
        "checked": "2026-10-09",
        "checked_by": "session-scripts/partstep.py (placement inverse from the source board; centroid-matched to KiCad library models on 59 reference cases)"
      }
    ]
  },
  "description": "Texas Instruments Analog Switches - Special Purpose, TQFN-20-EP(2.5x4.5). KiCad symbol, footprint and 3D as used on Adom boards; pin functions from the manufacturer datasheet."
}