HCT6961-8

{
  "slug": "hct6961-8",
  "version": "0.1.0",
  "type": "component",
  "description": "HCTmicro Analog To Digital Converters (ADC), QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "hct6961-8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "hct6961-8.step",
    "hct6961-8.lbr",
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    "docs/hct6961-8-datasheet.pdf",
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    "hct6961-8-hero.overlay.json",
    "hct6961-8-etched.glb"
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  "component": {
    "mpn": "HCT6961-8",
    "manufacturer": "HCTmicro",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2a305a398462aa48354886dd89000994.pdf",
    "parts": {
      "symbol": "hct6961-8.kicad_sym",
      "footprint": "hct6961-8.kicad_mod",
      "model_3d": "hct6961-8-hero.glb",
      "model_3d_plain": "hct6961-8-etched.glb",
      "model_3d_step": "hct6961-8-etched.step",
      "model_3d_step_plain": "hct6961-8.step",
      "lbr": "hct6961-8.lbr"
    },
    "distributor_links": {
      "lcsc": "C46469664"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T22:16:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave the pin unconnected."
      },
      {
        "number": "2",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital supply, with a ceramic capacitor greater than 0.1uF between DVDD and DVSS; DVDD must equal the external MCU supply voltage, though it may differ from AVDD."
      },
      {
        "number": "3",
        "name": "DVSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "4",
        "name": "AIN0/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN0, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB, (AVDD-AVSS)/2 with 5mA drive capability)."
      },
      {
        "number": "5",
        "name": "AIN1/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN1, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB, (AVDD-AVSS)/2 with 5mA drive capability)."
      },
      {
        "number": "6",
        "name": "AIN2/IOUT/VB/P1",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN2, alternatively IOUT or VB, and also general-purpose I/O P1 when enabled in SYS_CONF4; a pin used as GPIO cannot be used as an ADC input."
      },
      {
        "number": "7",
        "name": "AIN3/IOUT/VB/P2",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN3, alternatively IOUT or VB, and also general-purpose I/O P2 when enabled in SYS_CONF4; a pin used as GPIO cannot be used as an ADC input."
      },
      {
        "number": "8",
        "name": "AIN4/IOUT/VB/P3",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN4, alternatively IOUT or VB, and also general-purpose I/O P3 when enabled in SYS_CONF4; a pin used as GPIO cannot be used as an ADC input."
      },
      {
        "number": "9",
        "name": "AIN5/IOUT/VB/P4",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN5, alternatively IOUT or VB, and also general-purpose I/O P4 when enabled in SYS_CONF4; a pin used as GPIO cannot be used as an ADC input."
      },
      {
        "number": "10",
        "name": "AIN6/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN6, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "11",
        "name": "AIN7/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN7, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "12",
        "name": "REFP1",
        "type": "bidirectional",
        "description": "Positive input of reference voltage source 1; a capacitor of at least 1uF must be connected between REFP1 and REFN1."
      },
      {
        "number": "13",
        "name": "REFN1",
        "type": "bidirectional",
        "description": "Negative input of reference voltage source 1; normally connected to AVSS."
      },
      {
        "number": "14",
        "name": "AIN8/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN8, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "15",
        "name": "AIN9/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN9, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "16",
        "name": "AIN10/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN10, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "17",
        "name": "AIN11/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN11, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "18",
        "name": "AIN12/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN12, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "19",
        "name": "AIN13/IOUT/VB",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN13, which can alternatively be the IDAC current source output (IOUT) or the bias voltage output (VB)."
      },
      {
        "number": "20",
        "name": "AIN14/IOUT/VB/REFP2",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN14, alternatively IOUT or VB, and also the positive input of reference source 2 (REFP2), with the ADC reference chosen by REFSEL<1:0>."
      },
      {
        "number": "21",
        "name": "AIN15/IOUT/VB/REFN2",
        "type": "bidirectional",
        "description": "ADC analog input channel AIN15, alternatively IOUT or VB, and also the negative input of reference source 2 (REFN2), with the ADC reference chosen by REFSEL<1:0>."
      },
      {
        "number": "22",
        "name": "REFOUT",
        "type": "output",
        "description": "On-chip 2.5V internal reference output that requires a 1uF ceramic capacitor; if unused it must be left floating or grounded and must not be pulled up to the supply."
      },
      {
        "number": "23",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "24",
        "name": "VBCOM",
        "type": "output",
        "description": "Dedicated bias voltage output that may be filtered to ground with a 0.1uF capacitor and routed on the PCB to the signal node needing bias."
      },
      {
        "number": "25",
        "name": "PSW",
        "type": "bidirectional",
        "description": "Ground switch with 8 ohm on-impedance, enabled through the SWT_SIG register, and able to carry currents below 20mA."
      },
      {
        "number": "26",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply, with a capacitor of at least 1uF between AVDD and AVSS."
      },
      {
        "number": "27",
        "name": "SYNC",
        "type": "input",
        "description": "ADC synchronization input: when low the chip's internal operation is disabled, and going high starts operation so that multiple chips' conversion timing can be synchronized."
      },
      {
        "number": "28",
        "name": "DOUT/RDY_N",
        "type": "output",
        "description": "SPI data output that requires an external pull-up of at least 100 kOhm to the supply, with 1 MOhm recommended when the data rate is below 800Hz."
      },
      {
        "number": "29",
        "name": "DIN",
        "type": "input",
        "description": "SPI data input; no pull-up or pull-down resistor should be fitted to this pin."
      },
      {
        "number": "30",
        "name": "SCLK",
        "type": "input",
        "description": "SPI clock input, recommended to be held low when not communicating; no pull-up or pull-down resistor should be fitted."
      },
      {
        "number": "31",
        "name": "CLK",
        "type": "bidirectional",
        "description": "External 2.4576MHz precision clock input when CKSRSEL<1:0> is 10 or 11; when the internal RC clock is used, tie this pin to ground or set CKSRSEL<1:0>=01 to output the RC clock from this pin."
      },
      {
        "number": "32",
        "name": "CSN",
        "type": "input",
        "description": "SPI chip select input, active low; no pull-up or pull-down resistor should be fitted."
      },
      {
        "number": "33",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: Package mismatch to verify: the hint says QFN-32-EP(5x5), but the text only names the package QFN32L; Pinout taken from the HCT6961-8 table (Table 2-1, pages 29-31). The datasheet also has an HCT6961-4 ; Type assignment for analog and multi-function pins is an interpretation: the datasheet labels them o",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 55,
        "cost_usd": 0.1957,
        "at": "2026-10-17T22:15:23"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/2a305a398462aa48354886dd89000994.pdf",
        "pages": 93,
        "sha256": "1fb21f15d14c8618",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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  }
}