AT25256B-SSHL-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "at25256b-sshl-t",
  "title": "AT25256B-SSHL-T",
  "brief": "Microchip EEPROM, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "memory",
    "at25256b-sshl-t"
  ],
  "component": {
    "mpn": "AT25256B-SSHL-T",
    "manufacturer": "Microchip",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/07940475b493401e936fe9aa4c453984.pdf",
    "parts": {
      "symbol": "at25256b-sshl-t.kicad_sym",
      "footprint": "at25256b-sshl-t.kicad_mod",
      "model_3d": "at25256b-sshl-t-etched.glb",
      "model_3d_plain": "at25256b-sshl-t.glb",
      "model_3d_step": "at25256b-sshl-t-etched.step",
      "model_3d_step_plain": "at25256b-sshl-t.step",
      "lbr": "at25256b-sshl-t.lbr"
    },
    "distributor_links": {
      "mouser": "556-AT25256B-SSHL-T",
      "lcsc": "C36901"
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "Chip Select (active low). Enables the device when driven low; the device enters standby when high. All SPI transactions are framed by CS."
      },
      {
        "number": "2",
        "name": "SO",
        "type": "output",
        "description": "Serial Data Output. Data is shifted out on the falling edge of SCK (SPI mode 0). High-Z when CS is high. Output capacitance ~8pF."
      },
      {
        "number": "3",
        "name": "WP",
        "type": "input",
        "description": "Write Protect (active low). When low, disables writes to the status register (hardware data protection). Can be tied to VCC if unused."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "5",
        "name": "SI",
        "type": "input",
        "description": "Serial Data Input. Data (opcodes, addresses, and data to be written) is shifted in on the rising edge of SCK (SPI mode 0)."
      },
      {
        "number": "6",
        "name": "SCK",
        "type": "input",
        "description": "Serial Data Clock. Provides the timing reference for serial input and output. Max 20 MHz at VCC=4.5-5.5V, 10 MHz at 2.5-5.5V, 5 MHz at 1.8-5.5V."
      },
      {
        "number": "7",
        "name": "HOLD",
        "type": "input",
        "description": "Hold (active low). Suspends serial communication without resetting the serial sequence when driven low with CS low. Tie to VCC if unused."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. Operating range 1.8V to 5.5V. Supply current up to 10mA at 20MHz read, standby current 2-5µA typical."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/07940475b493401e936fe9aa4c453984.pdf",
        "pages": 22,
        "sha256": "327b6418a5554831",
        "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"
    },
    "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": "at25256b-sshl-t.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": "at25256b-sshl-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b4cd0fa8b6951be028e4e303a0fb1efd32214f9cea7de9c21738538cc6a4139d",
        "checked": "2026-11-03",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip",
      "Package": "SOIC-8",
      "Category": "Memory",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "at25256b-sshl-t"
  ],
  "discovery_pitch": "AT25256B-SSHL-T (Microchip) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at25256b-sshl-t.kicad_sym",
    "at25256b-sshl-t.kicad_mod",
    "at25256b-sshl-t.glb",
    "at25256b-sshl-t.step",
    "at25256b-sshl-t-etched.step",
    "at25256b-sshl-t.lbr",
    "docs/hero.png",
    "docs/at25256b-sshl-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:10:41.859Z"
}