SIT1050T

{
  "schema_version": 1,
  "type": "component",
  "slug": "sit1050t",
  "title": "SIT1050T",
  "brief": "SIT CAN Controllers, SO-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "sit1050t"
  ],
  "component": {
    "mpn": "SIT1050T",
    "manufacturer": "SIT",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "CAN Controllers",
    "datasheet": "docs/sit1050t-datasheet.pdf",
    "parts": {
      "symbol": "sit1050t.kicad_sym",
      "footprint": "sit1050t.kicad_mod",
      "model_3d": "sit1050t-etched.glb",
      "model_3d_plain": "sit1050t.glb",
      "model_3d_step": "sit1050t-etched.step",
      "model_3d_step_plain": "sit1050t.step",
      "lbr": "sit1050t.lbr"
    },
    "distributor_links": {
      "lcsc": "C313021"
    },
    "pins": [
      {
        "number": "1",
        "name": "TXD",
        "type": "input",
        "description": "Transmit data input from the CAN controller. CMOS-level logic input (VIH ≥ 2 V, VIL ≤ 0.8 V) with internal pull-up (IIL = -10 to -50 µA at VI = 0 V; IIH = ±2 µA at VI = VCC). A low level drives the bus dominant; high or open leaves the bus recessive. A dominant time-out (typ. 450 µs) prevents the bus from being held dominant indefinitely."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground supply reference (0 V). The exposed thermal pad of the DFN3x3-8/HVSON8 variant is internally connected to this pin and should be soldered to board ground for enhanced thermal performance."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "+5 V supply voltage input (recommended 4.5-5.5 V, abs-max -0.3 to +6 V). Typical supply current is ~6 mA in recessive/silent state and ~50 mA (max 70 mA) in dominant state with 60 Ω load."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "output",
        "description": "Receive data output to the CAN controller; reads out the differential state of the CAN bus. Push-pull CMOS output (VOH ≥ 4 V at IO = -2 mA, VOL ≤ 0.4 V at IO = 2 mA). LOW = dominant bus, HIGH = recessive bus."
      },
      {
        "number": "5",
        "name": "Vref",
        "type": "output",
        "description": "Reference voltage output at 0.5·VCC (spec 0.4·VCC to 0.6·VCC) capable of sourcing/sinking |IO| ≤ 50 µA. Provides a stable common-mode reference for the CAN controller or bus termination bias."
      },
      {
        "number": "6",
        "name": "CANL",
        "type": "bidirectional",
        "description": "LOW-level CAN bus line (differential pair with CANH). Driven low (VOL(D) 0.5-2.25 V, typ 1.5 V) in the dominant state and biased to 0.5·VCC in the recessive state. Handles DC bus voltages of -40 to +40 V and transient ±200 V (see Fig. 7); short-circuit currents are limited by internal protection."
      },
      {
        "number": "7",
        "name": "CANH",
        "type": "bidirectional",
        "description": "HIGH-level CAN bus line (differential pair with CANL). Driven high (VOH(D) 2.75-4.5 V, typ 3.5 V) in the dominant state and biased to 0.5·VCC in the recessive state. Handles DC bus voltages of -40 to +40 V and transient ±200 V; internal short-circuit and overcurrent protection."
      },
      {
        "number": "8",
        "name": "S",
        "type": "input",
        "description": "Silent-mode control input (a.k.a. STB). LOW or open = normal (transmitter enabled); HIGH = silent mode (transmitter disabled, receiver still active). VIH ≥ 2.0 V, VIL ≤ 0.8 V; input current 15-60 µA at VS = 2 V. Enable time from silent to dominant ≤ 1 µs."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "docs/sit1050t-datasheet.pdf",
        "pages": 17,
        "sha256": "32c8f1165b0507ef",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "sit1050t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "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)"
      },
      {
        "file": "sit1050t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f00bfcc91d318127ff8eaab30f717c1fd30ba6008c88408594719d6f69b355",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SIT",
      "Package": "SO-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sit1050t"
  ],
  "discovery_pitch": "SIT1050T (SIT) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sit1050t.kicad_sym",
    "sit1050t.kicad_mod",
    "sit1050t.glb",
    "sit1050t.step",
    "sit1050t-etched.step",
    "sit1050t.lbr",
    "docs/hero.png",
    "docs/sit1050t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "SIT1050TT",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T06:02:16.679Z"
}