TF21844-3BS

{
  "schema_version": 1,
  "type": "component",
  "slug": "tf21844-3bs",
  "title": "TF21844-3BS",
  "brief": "TFSS Gate Drivers, PDIP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "motor driver ics",
    "tf21844-3bs",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TF21844-3BS",
    "manufacturer": "TFSS",
    "package": "PDIP-14",
    "pin_count": 14,
    "category": "Motor Driver ICs",
    "subcategory": "Gate Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603184240771014656",
    "parts": {
      "symbol": "tf21844-3bs.kicad_sym",
      "footprint": "tf21844-3bs.kicad_mod",
      "model_3d": "tf21844-3bs-hero.glb",
      "model_3d_plain": "tf21844-3bs-etched.glb",
      "model_3d_step": "tf21844-3bs-etched.step",
      "model_3d_step_plain": "tf21844-3bs.step",
      "lbr": "tf21844-3bs.lbr"
    },
    "distributor_links": {
      "lcsc": "C6387920"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T15:01:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "input",
        "description": "Logic input for high-side and low-side gate driver outputs (HO and LO), in phase with HO, referenced to VSS, with Schmitt trigger and internal pull-down."
      },
      {
        "number": "2",
        "name": "SD*",
        "type": "input",
        "description": "Logic input for shutdown, referenced to VSS, enabled low."
      },
      {
        "number": "3",
        "name": "VSS",
        "type": "power_in",
        "description": "Logic ground; logic supply offset voltage -5V to +5V relative to COM."
      },
      {
        "number": "4",
        "name": "DT",
        "type": "passive",
        "description": "Programmable deadtime lead referenced to VSS; an external resistor sets dead time (about 400ns at RDT=0 ohm, 5us at 200k ohm)."
      },
      {
        "number": "5",
        "name": "COM",
        "type": "power_in",
        "description": "Low-side return."
      },
      {
        "number": "6",
        "name": "LO",
        "type": "output",
        "description": "Low-side gate drive output, 1.4A source / 1.8A sink capability."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Low-side and logic fixed supply, 10V to 20V recommended operating range."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "11",
        "name": "VS",
        "type": "power_in",
        "description": "High-side floating supply return; operates up to 600V in bootstrap operation."
      },
      {
        "number": "12",
        "name": "HO",
        "type": "output",
        "description": "High-side gate drive output, 1.4A source / 1.8A sink capability."
      },
      {
        "number": "13",
        "name": "VB",
        "type": "power_in",
        "description": "High-side floating supply, VS+10V to VS+20V recommended, absolute maximum +624V."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin numbering read from the top-view diagram on page 2, which is shared by PDIP-14 and SOIC-14. The ; The DT pin type is set to passive because it connects to an external resistor. The datasheet does no",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2271,
        "at": "2026-10-16T15:01:21"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603184240771014656",
        "pages": 9,
        "sha256": "e7b821c4d1eff14e",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tf21844-3bs.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3dae072a95c64bee0d1e58be8e75383639f5017ab982de1749d05808a4eed058",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tf21844-3bs-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dbf99f0bd3c0913918ac52fea9eb09adfc046f0e76094f775e4c9f79fcce3574",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "TFSS",
      "Package": "PDIP-14",
      "Category": "Motor Driver ICs",
      "Pins": "14"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e7b821c4d1eff14e282633e32bb774329bab984597c4bc77627f1465b63d661e",
      "rows": [
        {
          "name": "VB High side floating supply voltage (absolute maximum)",
          "symbol": "VB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 624,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC Logic and low side fixed supply voltage (absolute maximum)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 24,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Offset supply voltage transient (absolute maximum)",
          "symbol": "dVS/dt",
          "kind": "absolute_maximum",
          "unit": "V/ns",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VS High side floating supply offset voltage",
          "symbol": "VS",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "Logic operational for VS of -5V to 600V (NOTE3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC Logic and low side fixed supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 10,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VLO Low side output voltage",
          "symbol": "VLO",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VIN Logic input voltage (IN & SD*)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VSS Logic ground",
          "symbol": "VSS",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TA Ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TJ Junction operating temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TL Lead temperature (soldering)",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "Soldering, 10s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Tstg Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 input voltage for HO & logic 0 for LO",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "VCC = 10 V to 20 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 input voltage for HO & logic 1 for LO",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SD* input positive going threshold",
          "symbol": "VSD, TH+",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SD* input negative going threshold",
          "symbol": "VSD, TH-",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High level output voltage, VBIAS - VO",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.4,
          "conditions": "IO = 0A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low level output voltage, VO",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "IO = 20mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Offset supply leakage current",
          "symbol": "ILK",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VB = VS = 600V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent VBS supply current",
          "symbol": "IBSO",
          "kind": "electrical",
          "unit": "",
          "min": 20,
          "typ": 60,
          "max": 150,
          "conditions": "VIN = 0V or 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent VCC supply current",
          "symbol": "ICCQ",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.4,
          "typ": 1,
          "max": 1.8,
          "conditions": "VIN = 0V or 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 input bias current",
          "symbol": "IIN+",
          "kind": "electrical",
          "unit": "",
          "min": null,
          "typ": 25,
          "max": 60,
          "conditions": "IN = 5V, SD* = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 input bias current",
          "symbol": "IIN-",
          "kind": "electrical",
          "unit": "",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "IN = 0V, SD* = 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VBS supply under-voltage positive going threshold",
          "symbol": "VBSUV+",
          "kind": "electrical",
          "unit": "V",
          "min": 8,
          "typ": 8.9,
          "max": 9.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VBS supply under-voltage negative going threshold",
          "symbol": "VBSUV-",
          "kind": "electrical",
          "unit": "V",
          "min": 7.4,
          "typ": 8.2,
          "max": 9,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC supply under-voltage positive going threshold",
          "symbol": "VCCUV+",
          "kind": "electrical",
          "unit": "V",
          "min": 8,
          "typ": 8.9,
          "max": 9.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC supply under-voltage negative going threshold",
          "symbol": "VCCUV-",
          "kind": "electrical",
          "unit": "V",
          "min": 7.4,
          "typ": 8.2,
          "max": 9,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output high short circuit pulsed current",
          "symbol": "IO+",
          "kind": "electrical",
          "unit": "A",
          "min": 1.4,
          "typ": 1.9,
          "max": null,
          "conditions": "VO = 0V, PW ≤ 10 ms",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output low short circuit pulsed current",
          "symbol": "IO-",
          "kind": "electrical",
          "unit": "A",
          "min": 1.7,
          "typ": 2.3,
          "max": null,
          "conditions": "VO = 15V, PW ≤ 10 ms",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Turn-on propagation delay",
          "symbol": "tON",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 680,
          "max": 900,
          "conditions": "VS = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Turn-off propagation delay",
          "symbol": "tOFF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 270,
          "max": 400,
          "conditions": "VS = 0 V or 600V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Shut-down propagation delay",
          "symbol": "tSD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 180,
          "max": 270,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ON delay matching, HS & LS turn-on",
          "symbol": "tDM ON",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 90,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "OFF delay matching, HS & LS turn-off",
          "symbol": "tDM OFF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Turn-on rise time",
          "symbol": "tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 40,
          "max": 60,
          "conditions": "VS = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Turn-off fall time",
          "symbol": "tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 20,
          "max": 35,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deadtime tDT LO-HO & tDT HO-LO",
          "symbol": "tDT",
          "kind": "timing",
          "unit": "ns",
          "min": 280,
          "typ": 400,
          "max": 520,
          "conditions": "RDT = 0W",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deadtime tDT LO-HO & tDT HO-LO",
          "symbol": "tDT",
          "kind": "timing",
          "unit": "ms",
          "min": 4,
          "typ": 5,
          "max": 6,
          "conditions": "RDT= 200kW",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deadtime matching tMDT = tDT LO-HO - tDT HO-LO",
          "symbol": "tMDT",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0,
          "max": 50,
          "conditions": "RDT = 0W",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deadtime matching tMDT = tDT LO-HO - tDT HO-LO",
          "symbol": "tMDT",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0,
          "max": 600,
          "conditions": "RDT= 200kW",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tf21844-3bs"
  ],
  "discovery_pitch": "TF21844-3BS (TFSS) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tf21844-3bs.kicad_sym",
    "tf21844-3bs.kicad_mod",
    "tf21844-3bs.glb",
    "tf21844-3bs.step",
    "tf21844-3bs.lbr",
    "docs/hero.png",
    "docs/tf21844-3bs-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tf21844-3bs-hero.glb",
    "tf21844-3bs-hero.overlay.json",
    "tf21844-3bs-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}