TL494IDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "tl494idr",
  "title": "TL494IDR",
  "brief": "Texas Instruments DC-DC Converters, SOIC-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "tl494idr"
  ],
  "component": {
    "mpn": "TL494IDR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tl494.pdf",
    "parts": {
      "symbol": "tl494idr.kicad_sym",
      "footprint": "tl494idr.kicad_mod",
      "model_3d": "tl494idr-etched.glb",
      "model_3d_plain": "tl494idr.glb",
      "model_3d_step": "tl494idr-etched.step",
      "model_3d_step_plain": "tl494idr.step",
      "lbr": "tl494idr.lbr"
    },
    "distributor_links": {
      "lcsc": "C67476"
    },
    "pins": [
      {
        "number": "1",
        "name": "1IN+",
        "type": "input",
        "description": "Noninverting input to error amplifier 1. Common-mode input range −0.3 V to VCC − 2 V."
      },
      {
        "number": "2",
        "name": "1IN-",
        "type": "input",
        "description": "Inverting input to error amplifier 1. Common-mode input range −0.3 V to VCC − 2 V."
      },
      {
        "number": "3",
        "name": "FEEDBACK",
        "type": "input",
        "description": "Feedback / PWM-comparator input. Zero-duty-cycle input threshold ≈4 V; sinks 0.3-0.7 mA at 0.7 V. Ties together error-amp outputs and PWM comparator input."
      },
      {
        "number": "4",
        "name": "DTC",
        "type": "input",
        "description": "Dead-time control comparator input. Programs the minimum guaranteed off-time between output pulses; 0 V gives ~45% max duty per output, ~3.3 V forces zero duty. Input bias current up to −10 μA (0 to 5.25 V)."
      },
      {
        "number": "5",
        "name": "CT",
        "type": "passive",
        "description": "Oscillator timing capacitor terminal. CT ties from this pin to GND; recommended 0.47 nF to 10 μF. Sets oscillator frequency together with RT (fosc ≈ 1.1/(RT·CT))."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator timing resistor terminal. RT ties from this pin to GND; recommended 1.8 kΩ to 500 kΩ. Sets oscillator charge current with CT for fosc = 1 kHz-300 kHz."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground (0 V reference for all internal circuitry)."
      },
      {
        "number": "8",
        "name": "C1",
        "type": "output",
        "description": "Collector of uncommitted NPN output transistor 1. Sinks/sources up to 200 mA per transistor; VCEO(max) 41 V. Wire as common-emitter (output to VCC via load, E1 to GND) or emitter-follower depending on OUTPUT CTRL setting."
      },
      {
        "number": "9",
        "name": "E1",
        "type": "output",
        "description": "Emitter of uncommitted NPN output transistor 1. Handles 200 mA source in emitter-follower configuration or ties to GND for common-emitter drive."
      },
      {
        "number": "10",
        "name": "E2",
        "type": "output",
        "description": "Emitter of uncommitted NPN output transistor 2. 200-mA capable; wired analogously to E1 for single-ended or push-pull drive."
      },
      {
        "number": "11",
        "name": "C2",
        "type": "output",
        "description": "Collector of uncommitted NPN output transistor 2. Sinks/sources up to 200 mA; VCEO(max) 41 V. Complements C1 in push-pull operation."
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. Recommended operating range 7 V to 40 V (absolute max 41 V). Typical standby current 6 mA at VCC = 15 V."
      },
      {
        "number": "13",
        "name": "OUTPUT CTRL",
        "type": "input",
        "description": "Output configuration select. Tie to GND for parallel single-ended output (both transistors switch in phase); tie to REF (pin 14) for push-pull operation with the internal flip-flop steering alternating pulses to C1/E1 and C2/E2."
      },
      {
        "number": "14",
        "name": "REF",
        "type": "power_out",
        "description": "Internal 5-V ±5% precision reference output (4.75-5.25 V at IO = 1 mA). Source up to 10 mA to external circuitry; short-circuit current ≈25 mA. Commonly used to bias OUTPUT CTRL and error-amp dividers."
      },
      {
        "number": "15",
        "name": "2IN-",
        "type": "input",
        "description": "Inverting input to error amplifier 2. Common-mode input range −0.3 V to VCC − 2 V."
      },
      {
        "number": "16",
        "name": "2IN+",
        "type": "input",
        "description": "Noninverting input to error amplifier 2. Common-mode input range −0.3 V to VCC − 2 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tl494.pdf",
        "pages": 35,
        "sha256": "62ece39ba0620383",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "tl494idr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl494idr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          9.9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "70e5bae8499d2c19b5ab9bae4fbc0dc4c2e99ac0ecb02af527e445e6d7befaf3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tl494idr"
  ],
  "discovery_pitch": "TL494IDR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl494idr.kicad_sym",
    "tl494idr.kicad_mod",
    "tl494idr.glb",
    "tl494idr.step",
    "tl494idr-etched.step",
    "tl494idr.lbr",
    "docs/hero.png",
    "docs/tl494idr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "TL494IDRD",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDR",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRDB",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRDBR",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRN",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRNS",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRNSR",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRPW",
      "kind": "packaging"
    },
    {
      "mpn": "TL494IDRPWR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T10:02:00.998Z"
}