RX8025T-UB

{
  "schema_version": 1,
  "type": "component",
  "slug": "rx8025t-ub",
  "title": "RX8025T-UB",
  "brief": "Seiko Epson Real-time Clocks (RTC), SOP-14-208mil. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rtc",
    "rx8025t-ub"
  ],
  "component": {
    "mpn": "RX8025T-UB",
    "manufacturer": "Seiko Epson",
    "package": "SOP-14-208mil",
    "pin_count": 14,
    "category": "RTC",
    "subcategory": "Real-time Clocks (RTC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/16cae6401786756db40a0b4d442c9aa4.pdf",
    "parts": {
      "symbol": "rx8025t-ub.kicad_sym",
      "footprint": "rx8025t-ub.kicad_mod",
      "model_3d": "rx8025t-ub-etched.glb",
      "model_3d_plain": "rx8025t-ub.glb",
      "model_3d_step": "rx8025t-ub-etched.step",
      "model_3d_step_plain": "rx8025t-ub.step",
      "lbr": "rx8025t-ub.lbr"
    },
    "distributor_links": {
      "lcsc": "C17353"
    },
    "pins": [
      {
        "number": "1",
        "name": "T1/CE",
        "type": "input",
        "description": "Manufacturer test pin (T1, also labeled CE). Must be left unconnected externally."
      },
      {
        "number": "2",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input. Fmax = 400 kHz (Fast-mode). Requires external pull-up to VDD; no internal ESD diode to VDD, allowing level-shifted operation."
      },
      {
        "number": "3",
        "name": "FOUT",
        "type": "output",
        "description": "CMOS 32.768 kHz clock output. Enabled when FOE = H (outputs 32.768 kHz); when disabled the pin is Hi-Z. Drive per DC characteristics (e.g. VOH >= 2.9 V at IOH = -100 uA, VDD = 3 V)."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected to the internal IC. Leave open or tie to GND or VDD."
      },
      {
        "number": "5",
        "name": "TEST",
        "type": "input",
        "description": "Manufacturer test pin. Must be left unconnected externally."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply pin. Interface operating range 1.6-5.5 V (typ. 3.0 V); time-keeping down to 1.2 V. Bypass with at least 0.1 uF between VDD and GND."
      },
      {
        "number": "7",
        "name": "FOE",
        "type": "input",
        "description": "FOUT output enable. Level 'H' enables the 32.768 kHz FOUT output; level 'L' places FOUT in Hi-Z. VIH >= 0.8*VDD, VIL <= 0.2*VDD."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected to the internal IC. Leave open or tie to GND or VDD."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected to the internal IC. Leave open or tie to GND or VDD."
      },
      {
        "number": "10",
        "name": "/INT",
        "type": "output",
        "description": "Open-drain interrupt output for alarm, fixed-cycle timer, and time-update events. Asserts low when an interrupt fires; requires external pull-up. VOL <= GND+0.25 V at IOL = 1 mA, VDD = 5 V."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Module ground reference (0 V)."
      },
      {
        "number": "12",
        "name": "T2/VPP",
        "type": "passive",
        "description": "Manufacturer test pin (T2, also labeled VPP). Must be left unconnected externally."
      },
      {
        "number": "13",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data (address/data/ACK). N-channel open-drain output; requires external pull-up sized for the bus capacitance. No internal VDD diode, supports level-shifted buses."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected to the internal IC. Leave open or tie to GND or VDD."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/16cae6401786756db40a0b4d442c9aa4.pdf",
        "pages": 33,
        "sha256": "e061d6f8feb4ec7e",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -3.81
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-14_3.9x8.7mm_P1.27mm@sha256:a885b619b22880c9",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "rx8025t-ub.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "rx8025t-ub-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b4f7add6d4a412aa8268e457903927a05a45ed60a0e750e88ec69bf540931634",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Seiko Epson",
      "Package": "SOP-14-208mil",
      "Category": "RTC",
      "Pins": "14"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "rx8025t-ub"
  ],
  "discovery_pitch": "RX8025T-UB (Seiko Epson) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "rx8025t-ub.kicad_sym",
    "rx8025t-ub.kicad_mod",
    "rx8025t-ub.glb",
    "rx8025t-ub.step",
    "rx8025t-ub-etched.step",
    "rx8025t-ub.lbr",
    "docs/hero.png",
    "docs/rx8025t-ub-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "RX8025T-UB",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T05:22:55.667Z"
}