DAC8740HRGER

{
  "slug": "dac8740hrger",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Interface - Specialized, VQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "dac8740hrger",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "dac8740hrger.kicad_sym",
    "dac8740hrger.kicad_mod",
    "dac8740hrger.glb",
    "dac8740hrger.step",
    "dac8740hrger.lbr",
    "docs/hero.png",
    "docs/dac8740hrger-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "dac8740hrger-hero.glb",
    "dac8740hrger-hero.overlay.json"
  ],
  "component": {
    "mpn": "DAC8740HRGER",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Interface - Specialized",
    "datasheet": "https://www.ti.com/cn/lit/gpn/dac8740h",
    "parts": {
      "symbol": "dac8740hrger.kicad_sym",
      "footprint": "dac8740hrger.kicad_mod",
      "model_3d": "dac8740hrger-hero.glb",
      "model_3d_plain": "dac8740hrger.glb",
      "model_3d_step": "dac8740hrger-etched.step",
      "model_3d_step_plain": "dac8740hrger.step",
      "lbr": "dac8740hrger.lbr"
    },
    "distributor_links": {
      "lcsc": "C2674248",
      "digikey": "DAC8740HRGER-ND",
      "mouser": "595-DAC8740HRGER"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T01:25:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "DAC8740HRGER-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-DAC8740HRGER",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "XEN",
        "type": "input",
        "description": "Crystal oscillator enable; logic low enables external crystal oscillator circuit, logic high disables it requiring external CMOS clock or internal oscillator. No digital input pin should be left floating."
      },
      {
        "number": "2",
        "name": "CLKO",
        "type": "output",
        "description": "Clock output; can be configured as clock output when using internal oscillator or external crystal oscillator."
      },
      {
        "number": "3",
        "name": "CLK_CFG0",
        "type": "input",
        "description": "Clock configuration input; used to configure input/output clocking scheme. No digital input pin should be left floating."
      },
      {
        "number": "4",
        "name": "CLK_CFG1",
        "type": "input",
        "description": "Clock configuration input; used to configure input/output clocking scheme. No digital input pin should be left floating."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "input",
        "description": "Reset input; logic low places device into power-down mode and resets the device, logic high returns device to normal operation. No digital input pin should be left floating."
      },
      {
        "number": "6",
        "name": "CD",
        "type": "output",
        "description": "Carrier detect output; logic high indicates valid carrier is present in HART mode, or indicates jabber inhibitor has triggered in FF/PA mode."
      },
      {
        "number": "7",
        "name": "UART_IN",
        "type": "input",
        "description": "UART data input; serial data input for UART interface. No digital input pin should be left floating."
      },
      {
        "number": "8",
        "name": "UART_RTS",
        "type": "bidirectional",
        "description": "UART request to send; in HART mode, logic high enables demodulator and disables modulator, logic low enables modulator and disables demodulator; in FF/PA mode, reports transmit FIFO threshold information. No digital input pin should be left floating."
      },
      {
        "number": "9",
        "name": "DUPLEX",
        "type": "input",
        "description": "Full-duplex mode enable input; logic high enables full-duplex or internal loop-back test mode. No digital input pin should be left floating."
      },
      {
        "number": "10",
        "name": "UART_OUT",
        "type": "output",
        "description": "UART data output; serial data output from UART interface."
      },
      {
        "number": "11",
        "name": "IOVDD",
        "type": "power_in",
        "description": "Interface supply voltage; 1.71V to 5.5V supply for digital input and output circuitry, sets logical thresholds for digital interface."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground; ground reference voltage for all digital circuitry of the device."
      },
      {
        "number": "13",
        "name": "REG_CAP",
        "type": "passive",
        "description": "Internal regulator capacitor pad; connect capacitor for internal regulator."
      },
      {
        "number": "14",
        "name": "MOD_OUT",
        "type": "output",
        "description": "Modem output; FSK output sinusoid in HART mode or Manchester coded data stream in FOUNDATION Fieldbus and PROFIBUS PA modes; requires parallel capacitance of 5-22nF in HART mode or 0-100pF in FF/PA mode for stability."
      },
      {
        "number": "15",
        "name": "REF",
        "type": "bidirectional",
        "description": "Voltage reference; when internal reference enabled, outputs internal 1.5V reference voltage; when internal reference disabled, accepts external 2.5V reference input."
      },
      {
        "number": "16",
        "name": "MOD_IN",
        "type": "input",
        "description": "Modem input; HART FSK input or FOUNDATION Fieldbus and PROFIBUS PA Manchester coded data stream input. Do not connect if external filter is used."
      },
      {
        "number": "17",
        "name": "MOD_INF",
        "type": "input",
        "description": "Filtered modem input; when using internal band-pass filter, connect 680pF to pin in HART mode or 120pF in FF/PA modes; when using external filter, connect output of external filter to this pin."
      },
      {
        "number": "18",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply; 2.7V to 5.5V supply voltage for analog circuitry of the device."
      },
      {
        "number": "19",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground; ground reference voltage for power supply input."
      },
      {
        "number": "20",
        "name": "X2",
        "type": "input",
        "description": "Crystal oscillator stimulus input; second terminal of external crystal oscillator."
      },
      {
        "number": "21",
        "name": "X1",
        "type": "input",
        "description": "Crystal or clock input; first terminal of external crystal oscillator or external CMOS clock input."
      },
      {
        "number": "22",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground; ground reference voltage for all digital circuitry of the device."
      },
      {
        "number": "23",
        "name": "REF_EN",
        "type": "input",
        "description": "Reference enable input; logic high enables internal 1.5V reference. No digital input pin should be left floating."
      },
      {
        "number": "24",
        "name": "BPF_EN",
        "type": "input",
        "description": "Band-pass filter enable input; logic high enables internal band-pass filter. No digital input pin should be left floating."
      },
      {
        "number": "25",
        "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-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 25 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 17,
        "cost_usd": 0.1605,
        "at": "2026-10-07T01:24:46"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/dac8740h",
        "pages": 48,
        "sha256": "4cde27aab0a7c3d9",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "dac8740hrger.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "dac8740hrger-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "001a78ce452cd79a1c68a932186de85d6bff10eff75e943db6f9022c6ece916b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}