ATM90E26-YU-R

{
  "schema_version": 1,
  "type": "component",
  "slug": "atm90e26-yu-r",
  "title": "ATM90E26-YU-R",
  "brief": "Microchip Tech Energy Metering, SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data acquisition",
    "atm90e26-yu-r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ATM90E26-YU-R",
    "manufacturer": "Microchip Tech",
    "package": "SSOP-28-208mil",
    "pin_count": 28,
    "category": "Data Acquisition",
    "subcategory": "Energy Metering",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588940826353274880",
    "parts": {
      "symbol": "atm90e26-yu-r.kicad_sym",
      "footprint": "atm90e26-yu-r.kicad_mod",
      "model_3d": "atm90e26-yu-r-hero.glb",
      "model_3d_plain": "atm90e26-yu-r.glb",
      "model_3d_step": "atm90e26-yu-r-etched.step",
      "model_3d_step_plain": "atm90e26-yu-r.step",
      "lbr": "atm90e26-yu-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C616398"
    },
    "pins": [
      {
        "number": "1",
        "name": "MMD1",
        "type": "input",
        "description": "Metering mode configuration bit 1; used with MMD0 to select anti-tampering mode (00), L line mode (01), L+N mode (10), or flexible mode (11)."
      },
      {
        "number": "2",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground reference for digital circuitry."
      },
      {
        "number": "3",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply 2.8V to 3.6V; metering accuracy guaranteed within 3.0V to 3.6V; decouple with 10μF electrolytic and 0.1μF capacitor."
      },
      {
        "number": "4",
        "name": "Reset",
        "type": "input",
        "description": "Active-low hardware reset input; apply minimum 200μs pulse width and connect 0.1μF filter capacitor to ground."
      },
      {
        "number": "5",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply 2.8V to 3.6V; metering accuracy guaranteed within 3.0V to 3.6V; decouple with 0.1μF capacitor."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for analog circuitry."
      },
      {
        "number": "7",
        "name": "I2P",
        "type": "input",
        "description": "N line current positive input for differential measurement; input range 120μVrms to 600mVrms when N line gain is 1."
      },
      {
        "number": "8",
        "name": "I2N",
        "type": "input",
        "description": "N line current negative input for differential measurement; input range 120μVrms to 600mVrms when N line gain is 1."
      },
      {
        "number": "9",
        "name": "Resv_Low",
        "type": "input",
        "description": "Reserved input pin; connect to ground for normal operation."
      },
      {
        "number": "10",
        "name": "I1P",
        "type": "input",
        "description": "L line current positive input for differential measurement; input range 5μVrms to 25mVrms when L line gain is 24."
      },
      {
        "number": "11",
        "name": "I1N",
        "type": "input",
        "description": "L line current negative input for differential measurement; input range 5μVrms to 25mVrms when L line gain is 24."
      },
      {
        "number": "12",
        "name": "USEL",
        "type": "input",
        "description": "UART/SPI interface selection; high selects UART interface, low selects SPI interface; must not change after reset."
      },
      {
        "number": "13",
        "name": "Vref",
        "type": "power_in",
        "description": "Reference voltage output at 1.26V nominal; decouple with 1μF and 1nF capacitors in parallel to ground."
      },
      {
        "number": "14",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for analog circuitry."
      },
      {
        "number": "15",
        "name": "VN",
        "type": "input",
        "description": "Voltage measurement negative input for differential measurement; input range 120μVrms to 600mVrms."
      },
      {
        "number": "16",
        "name": "VP",
        "type": "input",
        "description": "Voltage measurement positive input for differential measurement; input range 120μVrms to 600mVrms."
      },
      {
        "number": "17",
        "name": "WarnOut",
        "type": "output",
        "description": "Fatal error warning output; asserted low when metering parameter calibration error or voltage sag is detected."
      },
      {
        "number": "18",
        "name": "CF1",
        "type": "output",
        "description": "Active energy pulse output; generates pulses proportional to active energy with width 80ms (if period ≥160ms) or 0.5T (if period <160ms)."
      },
      {
        "number": "19",
        "name": "CF2",
        "type": "output",
        "description": "Reactive energy pulse output; generates pulses proportional to reactive energy with width 80ms (if period ≥160ms) or 0.5T (if period <160ms)."
      },
      {
        "number": "20",
        "name": "IRQ",
        "type": "output",
        "description": "Interrupt output; asserted low when one or more events in the SysStatus register (01H) occur."
      },
      {
        "number": "21",
        "name": "ZX",
        "type": "output",
        "description": "Voltage zero-crossing detection output; asserts 5ms high pulse when voltage signal crosses zero."
      },
      {
        "number": "22",
        "name": "OSCI",
        "type": "input",
        "description": "External crystal oscillator input for 8.192MHz crystal; connect 12pF capacitor from pin to ground."
      },
      {
        "number": "23",
        "name": "OSCO",
        "type": "output",
        "description": "External crystal oscillator output for 8.192MHz crystal; connect 12pF capacitor from pin to ground."
      },
      {
        "number": "24",
        "name": "CS",
        "type": "input",
        "description": "Chip select (active low) for SPI interface; must be driven low for entire read/write operation in 4-wire mode or low all the time in 3-wire mode."
      },
      {
        "number": "25",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock for SPI interface; data on SDI shifted into chip on rising edge, data on SDO shifted out on falling edge."
      },
      {
        "number": "26",
        "name": "SDO/UTX",
        "type": "tri_state",
        "description": "Serial data output for SPI (output data on falling edge of SCLK) or UART transmit data; open-drain output requiring 10kΩ pull-up resistor to VDD."
      },
      {
        "number": "27",
        "name": "SDI/URX",
        "type": "input",
        "description": "Serial data input for SPI (input address and data on rising edge of SCLK) or UART receive data; 5V compatible input."
      },
      {
        "number": "28",
        "name": "MMD0",
        "type": "input",
        "description": "Metering mode configuration bit 0; used with MMD1 to select anti-tampering mode (00), L line mode (01), L+N mode (10), or flexible mode (11)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 60,
        "cost_usd": 0.4546,
        "at": "2026-09-22T05:13:40"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588940826353274880",
        "pages": 60,
        "sha256": "2f88e1a16337c82a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atm90e26-yu-r.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          10.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7aa76979ae41da44bded1ed74115012868f2f3f5a757faf32bb9df4f92c1e313",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atm90e26-yu-r-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          10.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1124aefd21314f14db05bee8d431b822212da719218d3dd983c47985b760f498",
        "checked": "2026-11-13",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "SSOP-28-208mil",
      "Category": "Data Acquisition",
      "Pins": "28"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "atm90e26-yu-r"
  ],
  "discovery_pitch": "ATM90E26-YU-R (Microchip Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atm90e26-yu-r.kicad_sym",
    "atm90e26-yu-r.kicad_mod",
    "atm90e26-yu-r.glb",
    "atm90e26-yu-r.step",
    "atm90e26-yu-r.lbr",
    "docs/hero.png",
    "docs/atm90e26-yu-r-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atm90e26-yu-r-etched.step",
    "atm90e26-yu-r-hero.glb",
    "atm90e26-yu-r-hero.overlay.json"
  ],
  "visibility": "public",
  "updated_at": "2026-09-24T17:16:56.842Z",
  "description": "Microchip Tech Energy Metering, SSOP-28-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}