PSSI2021SAY

{
  "schema_version": 1,
  "type": "component",
  "slug": "pssi2021say",
  "title": "PSSI2021SAY",
  "brief": "Nexperia Current Source / Constant Current Source, SOT-353. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "pssi2021say"
  ],
  "component": {
    "mpn": "PSSI2021SAY",
    "manufacturer": "Nexperia",
    "package": "SOT-353",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Current Source / Constant Current Source",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/PSSI2021SAY.pdf",
    "parts": {
      "symbol": "pssi2021say.kicad_sym",
      "footprint": "pssi2021say.kicad_mod",
      "model_3d": "pssi2021say-etched.glb",
      "model_3d_plain": "pssi2021say.glb",
      "model_3d_step": "pssi2021say-etched.step",
      "model_3d_step_plain": "pssi2021say.step",
      "lbr": "pssi2021say.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "n.c.",
        "type": "unconnected",
        "description": "Not connected. Leave floating or tie to any convenient net; the pin has no internal bond."
      },
      {
        "number": "2",
        "name": "IOUT",
        "type": "output",
        "description": "Regulated output current terminal. Sources a stabilized current (15 uA to 50 mA) into the load referenced to GND. Internal PNP collector; output voltage rating Vout = 73 V (with VS = 75 V)."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / return terminal for the load current. All internal references are taken with respect to this pin."
      },
      {
        "number": "4",
        "name": "REXT",
        "type": "passive",
        "description": "External resistor terminal used to program the output current. Connect a resistor Rext between REXT (pin 4) and VS (pin 5); Iout = 0.617/Rext + 15 uA. Left open, typical Iout is ~15 uA. Internal resistor value is ~48 kOhm."
      },
      {
        "number": "5",
        "name": "VS",
        "type": "power_in",
        "description": "Supply voltage terminal. Absolute maximum VS = 75 V. Also serves as the reference node for the external programming resistor (Rext between pin 5 and pin 4)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/PSSI2021SAY.pdf",
        "pages": 13,
        "sha256": "403e1e89af407de3",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "pssi2021say.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.1,
          2.0,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2860de5b7b085919ff6e952148353f928798588d9f544dc69430545aff2ba908",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pssi2021say-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.1,
          2.0,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ed1c8bac461a54c04d11defae9d9259f9d9cb3fc807a86d3fc9bf773c799131e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Nexperia",
      "Package": "SOT-353",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    }
  },
  "variants": [
    {
      "mpn": "PSSI2021SAY",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "pssi2021say"
  ],
  "discovery_pitch": "PSSI2021SAY (Nexperia) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "pssi2021say.kicad_sym",
    "pssi2021say.kicad_mod",
    "pssi2021say.glb",
    "pssi2021say.step",
    "pssi2021say.lbr",
    "docs/hero.png",
    "docs/pssi2021say-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T04:32:51.825Z"
}