COS3157ST

{
  "schema_version": 1,
  "type": "component",
  "slug": "cos3157st",
  "title": "COS3157ST",
  "brief": "COSINE Analog Switches, Multiplexers, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "cos3157st"
  ],
  "component": {
    "mpn": "COS3157ST",
    "manufacturer": "COSINE",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9334d49684b7712cd1b3bd08cb7988e3.pdf",
    "parts": {
      "symbol": "cos3157st.kicad_sym",
      "footprint": "cos3157st.kicad_mod",
      "model_3d": "cos3157st-etched.glb",
      "model_3d_plain": "cos3157st.glb",
      "model_3d_step": "cos3157st-etched.step",
      "model_3d_step_plain": "cos3157st.step",
      "lbr": "cos3157st.lbr"
    },
    "distributor_links": {
      "lcsc": "C42381445"
    },
    "pins": [
      {
        "number": "1",
        "name": "NO",
        "type": "bidirectional",
        "description": "Normally Open analog switch terminal. Connected to COM when IN = 1 (switch ON), high-impedance when IN = 0. Rail-to-rail analog signal range 0V to VCC; conducts equally well in both directions with ~4.5Ω typical ON resistance."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the device. 0V reference for supply and digital control input."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "bidirectional",
        "description": "Normally Closed analog switch terminal. Connected to COM when IN = 0 (switch ON), high-impedance when IN = 1. Rail-to-rail analog signal range 0V to VCC; conducts equally well in both directions. Note: 'NC' here means Normally Closed switch pole, not No-Connect."
      },
      {
        "number": "4",
        "name": "COM",
        "type": "bidirectional",
        "description": "Common analog switch terminal. Routed to either NO or NC depending on the state of the IN control pin. Rail-to-rail signal range 0V to VCC."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input. Recommended operating range 1.65V to 5.5V (absolute max 6.0V). Typical quiescent supply current ICC ≤ 5µA at 5.5V."
      },
      {
        "number": "6",
        "name": "IN",
        "type": "input",
        "description": "Digital control input selecting the switch state. IN = 0 → NC-to-COM path ON, NO OFF; IN = 1 → NO-to-COM path ON, NC OFF. TTL/CMOS compatible: VIH ≥ 2.6V (5V), ≥1.7V (3.3V); VIL ≤ 0.8V (5V), ≤0.7V (3.3V). Must be held HIGH or LOW; do not leave floating."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9334d49684b7712cd1b3bd08cb7988e3.pdf",
        "pages": 10,
        "sha256": "7d3155a9f9498ff0",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "cos3157st.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cos3157st-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "62ed1f25a886ee768387f2fe06d0a6573ddc65dc616ce75a2e617a154bedd6f1",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "COSINE",
      "Package": "SOT-23-6",
      "Category": "Interface",
      "Pins": "6"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cos3157st"
  ],
  "discovery_pitch": "COS3157ST (COSINE) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cos3157st.kicad_sym",
    "cos3157st.kicad_mod",
    "cos3157st.glb",
    "cos3157st.step",
    "cos3157st-etched.step",
    "cos3157st.lbr",
    "docs/hero.png",
    "docs/cos3157st-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "COS3157ST",
      "kind": "packaging"
    },
    {
      "mpn": "COS3157STSC",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T19:27:01.405Z"
}