HT34118ARWZ

{
  "slug": "ht34118arwz",
  "version": "0.1.0",
  "type": "component",
  "description": "HTCSEMI Audio Interface ICs, SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "ht34118arwz",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
  },
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    "README.md",
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    "ht34118arwz.step",
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  "component": {
    "mpn": "HT34118ARWZ",
    "manufacturer": "HTCSEMI",
    "package": "SOP-28",
    "pin_count": 28,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Audio Interface ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/fec1cc60d36f5c5297ad0dc504fb9abd.pdf",
    "parts": {
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      "model_3d_step_plain": "ht34118arwz.step",
      "lbr": "ht34118arwz.lbr"
    },
    "distributor_links": {
      "lcsc": "C2998007"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T20:59:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "FO",
        "type": "output",
        "description": "Filter output with output impedance less than 50 Ω."
      },
      {
        "number": "2",
        "name": "FI",
        "type": "input",
        "description": "Filter input with input impedance greater than 1.0 MΩ."
      },
      {
        "number": "3",
        "name": "CD",
        "type": "input",
        "description": "Chip Disable: logic low (<0.8 V) sets normal operation, logic high (>2.0 V) powers down the IC; input impedance nominally 90 kΩ."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage of +2.8 to +6.5 V is required at about 5.0 mA; as VCC falls from 3.5 to 2.8 V an AGC reduces the receive attenuator gain by about 25 dB in receive mode."
      },
      {
        "number": "5",
        "name": "HTO+",
        "type": "output",
        "description": "Output of the second hybrid amplifier with gain internally set at -1.0, giving a differential output with HTO- to the hybrid transformer."
      },
      {
        "number": "6",
        "name": "HTO-",
        "type": "output",
        "description": "Output of the first hybrid amplifier, with gain set by external resistors."
      },
      {
        "number": "7",
        "name": "HTI",
        "type": "input",
        "description": "Input and summing node of the first hybrid amplifier; DC level is about VB."
      },
      {
        "number": "8",
        "name": "TXO",
        "type": "output",
        "description": "Output of the transmit attenuator; DC level is approximately VB."
      },
      {
        "number": "9",
        "name": "TXI",
        "type": "input",
        "description": "Input to the transmit attenuator; max signal level 350 mVrms, input impedance about 10 kΩ."
      },
      {
        "number": "10",
        "name": "MCO",
        "type": "output",
        "description": "Output of the microphone amplifier, with gain set by external resistors."
      },
      {
        "number": "11",
        "name": "MCI",
        "type": "input",
        "description": "Input and summing node of the microphone amplifier; DC level is about VB."
      },
      {
        "number": "12",
        "name": "MUT",
        "type": "input",
        "description": "Mute input: logic low (<0.8 V) sets normal operation, logic high (>2.0 V) mutes the microphone amplifier; ground if unused."
      },
      {
        "number": "13",
        "name": "VLC",
        "type": "input",
        "description": "Volume control input: at VLC = VB the receive attenuator is at maximum gain in receive mode, at 0.3 VB the receive gain is down 35 dB; no effect on transmit mode."
      },
      {
        "number": "14",
        "name": "CT",
        "type": "passive",
        "description": "An RC at this pin sets the response time for the circuit to switch modes."
      },
      {
        "number": "15",
        "name": "VB",
        "type": "power_out",
        "description": "Output voltage of about VCC/2 serving as system AC ground and biasing the volume control; a filter capacitor is required."
      },
      {
        "number": "16",
        "name": "CPT",
        "type": "passive",
        "description": "An RC at this pin sets the time constant for the transmit background monitor."
      },
      {
        "number": "17",
        "name": "TLI2",
        "type": "input",
        "description": "Input to the transmit level detector on the mike/speaker side."
      },
      {
        "number": "18",
        "name": "TLO2",
        "type": "output",
        "description": "Output of the transmit level detector on the mike/speaker side and input to the transmit background monitor."
      },
      {
        "number": "19",
        "name": "RLO2",
        "type": "output",
        "description": "Output of the receive level detector on the mike/speaker side."
      },
      {
        "number": "20",
        "name": "RLI2",
        "type": "input",
        "description": "Input to the receive level detector on the mike/speaker side."
      },
      {
        "number": "21",
        "name": "RXI",
        "type": "input",
        "description": "Input to the receive attenuator and dial tone detector; max input level 350 mVrms, input impedance about 10 kΩ."
      },
      {
        "number": "22",
        "name": "RXO",
        "type": "output",
        "description": "Output of the receive attenuator; DC level is approximately VB."
      },
      {
        "number": "23",
        "name": "TLI1",
        "type": "input",
        "description": "Input to the transmit level detector on the line side."
      },
      {
        "number": "24",
        "name": "TLO1",
        "type": "output",
        "description": "Output of the transmit level detector on the line side."
      },
      {
        "number": "25",
        "name": "RLO1",
        "type": "output",
        "description": "Output of the receive level detector on the line side and input to the receive background monitor."
      },
      {
        "number": "26",
        "name": "RLI1",
        "type": "input",
        "description": "Input to the receive level detector on the line side."
      },
      {
        "number": "27",
        "name": "CPR",
        "type": "passive",
        "description": "An RC at this pin sets the time constant for the receive background monitor."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the entire IC."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Ordering info lists HT34118ARW (SOIC) while the MPN is HT34118ARWZ; the Z suffix is not explained, a; Pin 12 MUT description says input impedance is nominally 90 Ω (likely a typo for 90 kΩ); the electri; Types for passive RC pins (CT, CPT, CPR) and VB (power_out) are judgement calls."
        ],
        "pages_sent": 14,
        "cost_usd": 0.153,
        "at": "2026-10-22T20:58:42"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/fec1cc60d36f5c5297ad0dc504fb9abd.pdf",
        "pages": 14,
        "sha256": "0954d559d744c7b2",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "zmin_mm": 0.0,
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        "sha256": "ecc34510e8f74b6103a72c2f24133ad80006c738972a56531d1221b277fcecdb",
        "checked": "2026-10-22",
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        "sha256": "c974fdd1afbe38155ccd2245c66db9ca65667149f016f3c1b8a4300dc74581e8",
        "checked": "2026-10-22",
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  }
}