SIT1042AQT

{
  "schema_version": 1,
  "type": "component",
  "slug": "sit1042aqt",
  "title": "SIT1042AQT",
  "brief": "SIT CAN ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "comm-uart",
    "sit1042aqt"
  ],
  "component": {
    "mpn": "SIT1042AQT",
    "manufacturer": "SIT",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Comm/UART",
    "subcategory": "CAN ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2405131100_SIT-SIT1042AQT-3_C5382542.pdf",
    "parts": {
      "symbol": "sit1042aqt.kicad_sym",
      "footprint": "sit1042aqt.kicad_mod",
      "model_3d": "sit1042aqt-etched.glb",
      "model_3d_plain": "sit1042aqt.glb",
      "model_3d_step": "sit1042aqt-etched.step",
      "model_3d_step_plain": "sit1042aqt.step",
      "lbr": "sit1042aqt.lbr"
    },
    "distributor_links": {
      "lcsc": "C5382541"
    },
    "pins": [
      {
        "number": "1",
        "name": "TXD",
        "type": "input",
        "description": "Transmit data input from the CAN controller. Drives the differential bus: logic low = dominant, logic high = recessive. Internal pull-up to VIO (or VCC on non-VIO variants). TXD dominant timeout t_dom_TXD is typically 2 ms (0.8-4 ms), which forces the driver back to recessive if TXD is stuck low."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference for both the VCC supply and the CAN bus differential outputs."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Main 5V transceiver supply for the CAN bus driver stage. Operating range 4.5-5.5 V. Includes an integrated under-voltage lockout that forces the bus and RXD to the recessive state when VCC is below the UVLO threshold."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "output",
        "description": "Receive data output to the CAN controller. Drives logic low when the bus is dominant and logic high when recessive. Push-pull output referenced to VIO (or VCC on non-VIO variants); I_OH ≈ −3 mA, I_OL ≈ 5 mA."
      },
      {
        "number": "5",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No internal connection on the SIT1042AQT / SIT1042AQT/1 / SIT1042AQTK / SIT1042AQTK/1 variants (no VIO level-shift supply on these ordering codes). May be left floating or tied to GND. On /3, /31, /K3, /K31 suffix variants this pin is instead the VIO I/O-level supply (1.8-5.5 V region, 2.8-5.5 V spec range) for 3.3 V MCU compatibility."
      },
      {
        "number": "6",
        "name": "CANL",
        "type": "bidirectional",
        "description": "Low-side CAN bus I/O. In the dominant state driven to V_OL(D) ≈ 1.5 V (0.5-2.25 V) into a 60 Ω load; recessive state biased to ~0.5·VCC. Withstands ±58 V bus faults and supports −27 V to +32 V common-mode range on the receiver."
      },
      {
        "number": "7",
        "name": "CANH",
        "type": "bidirectional",
        "description": "High-side CAN bus I/O. In the dominant state driven to V_OH(D) ≈ 3.5 V (2.75-4.5 V) into a 60 Ω load; recessive state biased to ~0.5·VCC. Withstands ±58 V bus faults and supports −27 V to +32 V common-mode range on the receiver."
      },
      {
        "number": "8",
        "name": "STB",
        "type": "input",
        "description": "Mode-select input: low = high-speed normal mode, high = low-power standby mode with bus wake-up detection. Wake-up time t_WAKE typically 0.5-1.8 µs, standby-to-normal enable time t_EN ≤ 10 µs. Internal pull-up to VIO (or VCC) so the device defaults to standby if left floating."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2405131100_SIT-SIT1042AQT-3_C5382542.pdf",
        "pages": 22,
        "sha256": "07c6ae984de4a519",
        "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": "sit1042aqt.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": "sit1042aqt-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": "147125cbca8855a3b864946c3346f7662f82ea167244fae1a614798c3169944a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SIT",
      "Package": "SOP-8",
      "Category": "Comm/UART",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sit1042aqt"
  ],
  "discovery_pitch": "SIT1042AQT (SIT) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sit1042aqt.kicad_sym",
    "sit1042aqt.kicad_mod",
    "sit1042aqt.glb",
    "sit1042aqt.step",
    "sit1042aqt-etched.step",
    "sit1042aqt.lbr",
    "docs/hero.png",
    "docs/sit1042aqt-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SIT1042AQT",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQT/1",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQT/3",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQT/31",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQTK",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQTK/1",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQTK/3",
      "kind": "packaging"
    },
    {
      "mpn": "SIT1042AQTK/31",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T06:01:44.274Z"
}