DS8921ATMX

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds8921atmx",
  "title": "DS8921ATMX",
  "brief": "Texas Instruments RS-485 / RS-422 ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "DS8921ATMX",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ds8921atmx.pdf",
    "parts": {
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      "footprint": "ds8921atmx.kicad_mod",
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      "lbr": "ds8921atmx.lbr"
    },
    "distributor_links": {
      "lcsc": "C5216058"
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply pin; rated 5 V with operating range 4.5 to 5.5 V"
      },
      {
        "number": "2",
        "name": "RO",
        "type": "output",
        "description": "Receiver output pin; TTL-compatible with VOH = 2.5 V minimum, VOL = 0.5 V maximum"
      },
      {
        "number": "3",
        "name": "DI",
        "type": "input",
        "description": "TTL/CMOS-compatible driver input; VIH = 2.0 V, VIL = 0.8 V"
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin"
      },
      {
        "number": "5",
        "name": "DO–",
        "type": "output",
        "description": "Inverting differential driver output; VOH = 2.5 V minimum, VOL = 0.5 V maximum"
      },
      {
        "number": "6",
        "name": "DO+",
        "type": "output",
        "description": "Non-inverting differential driver output; VOH = 2.5 V minimum, VOL = 0.5 V maximum"
      },
      {
        "number": "7",
        "name": "RI–",
        "type": "input",
        "description": "Inverting differential receiver input; ±200 mV sensitivity over ±7 V common-mode range"
      },
      {
        "number": "8",
        "name": "RI+",
        "type": "input",
        "description": "Non-inverting differential receiver input; ±200 mV sensitivity over ±7 V common-mode range"
      }
    ],
    "provenance": {
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      "factory_chain": {
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        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 22,
        "cost_usd": 0.18,
        "at": "2026-09-24T05:38:41"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ds8921atmx.pdf",
        "pages": 22,
        "sha256": "0be14ebc915d205b",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
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        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "sha256": "4e15ac20364075942de51d42248a0e31939abd23a51a3a7bb36e26c252cdbc7f",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "DS8921ATMX (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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  "visibility": {
    "public": true
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}