AT25256B-SSHL-B

{
  "slug": "at25256b-sshl-b",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech EEPROM, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "memory",
    "at25256b-sshl-b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at25256b-sshl-b.kicad_sym",
    "at25256b-sshl-b.kicad_mod",
    "at25256b-sshl-b.glb",
    "at25256b-sshl-b.step",
    "at25256b-sshl-b.lbr",
    "docs/hero.png",
    "docs/at25256b-sshl-b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "at25256b-sshl-b-hero.glb",
    "at25256b-sshl-b-hero.overlay.json",
    "at25256b-sshl-b-etched.glb"
  ],
  "component": {
    "mpn": "AT25256B-SSHL-B",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a967dd18eb5fade8be008d64244ba9ad.pdf",
    "parts": {
      "symbol": "at25256b-sshl-b.kicad_sym",
      "footprint": "at25256b-sshl-b.kicad_mod",
      "model_3d": "at25256b-sshl-b-hero.glb",
      "model_3d_plain": "at25256b-sshl-b-etched.glb",
      "model_3d_step": "at25256b-sshl-b-etched.step",
      "model_3d_step_plain": "at25256b-sshl-b.step",
      "lbr": "at25256b-sshl-b.lbr"
    },
    "distributor_links": {
      "lcsc": "C615490",
      "digikey": "AT25256B-SSHL-B-ND",
      "mouser": "556-AT25256B-SSHL-B"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T21:38:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "AT25256B-SSHL-B-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-AT25256B-SSHL-B",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "Chip select is active low, so the device is selected only when CS is low; it should be pulled up to VCC with a resistor of 10 kΩ or less, and a low level is required after power-up before any sequence starts."
      },
      {
        "number": "2",
        "name": "SO",
        "type": "tri_state",
        "description": "Serial data output shifts data out after the falling edge of SCK and stays in a high-impedance state when the device is not selected."
      },
      {
        "number": "3",
        "name": "WP",
        "type": "input",
        "description": "Write-protect pin, when driven low with WPEN set to 1, inhibits all write operations to the STATUS register, and it should be driven high or low as appropriate."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device power supply (VCC), to be connected to the system ground."
      },
      {
        "number": "5",
        "name": "SI",
        "type": "input",
        "description": "Serial data input receives instructions, addresses and data, which are latched on the rising edge of SCK."
      },
      {
        "number": "6",
        "name": "SCK",
        "type": "input",
        "description": "Serial data clock synchronizes communication, latching SI on its rising edge and clocking SO out on its falling edge."
      },
      {
        "number": "7",
        "name": "HOLD",
        "type": "input",
        "description": "Suspend serial input pauses communication when driven low during SCK low with CS low, causing SO to go high-impedance and ignoring SI and SCK, and it should be driven high or low as appropriate."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Device power supply; the device operates from 1.8 V to 5.5 V, and operation at invalid VCC voltages may produce spurious results and should not be attempted."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The exact MPN AT25256B-SSHL-B does not appear in the ordering table. The table lists AT25256B-SSHL-T; Pin numbers and names come from the 8-Lead SOIC column of Table 2-1 (page 5). The pin types are KiCa"
        ],
        "pages_sent": 22,
        "cost_usd": 0.0637,
        "at": "2026-10-28T21:37:52"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a967dd18eb5fade8be008d64244ba9ad.pdf",
        "pages": 42,
        "sha256": "0166fe1a8508df27",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "at25256b-sshl-b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "at25256b-sshl-b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0df07004751f96f9ff129715de4cf223608e4391aa23e1cb76334922ad72b641",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SN",
      "source_page": 29,
      "D": {
        "nom_mm": 4.9,
        "range_mm": [
          null,
          null
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          null,
          null
        ]
      },
      "E": {
        "nom_mm": 6.0,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.75,
        "range_mm": [
          null,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "at25256b-sshl-b.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}