MT8870DNR1

{
  "slug": "mt8870dnr1",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Telecommunication Interface ICs, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "mt8870dnr1",
    "factory-2.0.0",
    "extractor-text"
  ],
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    "mt8870dnr1.lbr",
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    "docs/mt8870dnr1-datasheet.pdf",
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    "viewers/footprint.html",
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    "mt8870dnr1-hero.overlay.json",
    "mt8870dnr1-etched.glb"
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  "component": {
    "mpn": "MT8870DNR1",
    "manufacturer": "Microchip Tech",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Telecommunication Interface ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a9e2b76c88d472affafeb5c2c1601a76.pdf",
    "parts": {
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      "lbr": "mt8870dnr1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2651982",
      "mouser": "494-MT8870DNR1"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T02:19:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "494-MT8870DNR1",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IN+",
        "type": "input",
        "description": "Non-inverting input of the front-end differential op-amp."
      },
      {
        "number": "2",
        "name": "IN-",
        "type": "input",
        "description": "Inverting input of the front-end differential op-amp."
      },
      {
        "number": "3",
        "name": "GS",
        "type": "output",
        "description": "Gain select pin giving access to the front-end differential amplifier output so a feedback resistor can be connected for gain adjustment."
      },
      {
        "number": "4",
        "name": "VRef",
        "type": "power_in",
        "description": "Reference voltage output, nominally VDD/2, used to bias the inputs at mid-rail; 2.3 V to 2.7 V at VDD = 5.0 V with no load."
      },
      {
        "number": "5",
        "name": "INH",
        "type": "input",
        "description": "Logic high inhibits detection of tones representing characters A, B, C and D; the pin is internally pulled down."
      },
      {
        "number": "6",
        "name": "PWDN",
        "type": "input",
        "description": "Active-high power-down input that powers down the device and stops the oscillator; the pin is internally pulled down."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "8",
        "name": "OSC1",
        "type": "input",
        "description": "Clock input; a 3.579545 MHz crystal is connected between OSC1 and OSC2 to complete the internal oscillator."
      },
      {
        "number": "9",
        "name": "OSC2",
        "type": "output",
        "description": "Clock output; a 3.579545 MHz crystal between OSC1 and OSC2 completes the oscillator, with a maximum load of 30 pF on OSC2."
      },
      {
        "number": "10",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground, 0 V typical."
      },
      {
        "number": "11",
        "name": "TOE",
        "type": "input",
        "description": "Three-state output enable; logic high enables outputs Q1 to Q4 and the pin is pulled up internally, while logic low puts Q1 to Q4 in high impedance."
      },
      {
        "number": "12",
        "name": "Q1",
        "type": "tri_state",
        "description": "Three-state decoded tone data output, bit 1, providing the code for the last valid tone pair when enabled by TOE."
      },
      {
        "number": "13",
        "name": "Q2",
        "type": "tri_state",
        "description": "Three-state decoded tone data output, bit 2, providing the code for the last valid tone pair when enabled by TOE."
      },
      {
        "number": "14",
        "name": "Q3",
        "type": "tri_state",
        "description": "Three-state decoded tone data output, bit 3, providing the code for the last valid tone pair when enabled by TOE."
      },
      {
        "number": "15",
        "name": "Q4",
        "type": "tri_state",
        "description": "Three-state decoded tone data output, bit 4, providing the code for the last valid tone pair when enabled by TOE."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "17",
        "name": "StD",
        "type": "output",
        "description": "Delayed steering output that goes high when a tone pair has been registered and the output latch updated, and returns low when St/GT falls below VTSt."
      },
      {
        "number": "18",
        "name": "ESt",
        "type": "output",
        "description": "Early steering output that goes high once a valid tone pair is detected and returns low on any momentary loss of signal condition."
      },
      {
        "number": "19",
        "name": "St/GT",
        "type": "bidirectional",
        "description": "Steering input and guard-time output; a voltage above VTSt registers the tone pair, and a voltage below VTSt frees the device for a new tone pair."
      },
      {
        "number": "20",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply, +5 V typical (4.75 V to 5.25 V recommended operating range)."
      }
    ],
    "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 20-pin SSOP pin table on page 3 lists NC at pins 7 and 16. The page 2 SSOP drawing text is garbl; The datasheet lists Q1-Q4 only as a range (pins 12-15 for the 20-pin package). The individual assign; The package is given as SSOP-20-208mil, but the datasheet only says '20 Pin SSOP' and does not state",
          "1/20 pins cited to the wrong page (name found elsewhere): ['8:OSC1@p2']",
          "1/20 pin names appear NOWHERE in the datasheet text: ['9:OSC2@p2']"
        ],
        "pages_sent": 19,
        "cost_usd": 0.0821,
        "at": "2026-10-29T02:19:17"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a9e2b76c88d472affafeb5c2c1601a76.pdf",
        "pages": 19,
        "sha256": "02ae9b549be6ca37",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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}