CC2541F256RHAR

{
  "schema_version": 1,
  "type": "component",
  "slug": "cc2541f256rhar",
  "title": "CC2541F256RHAR",
  "brief": "Texas Instruments RF Transceiver ICs, WQFN-40-EP(6x6). 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",
    "rf and wireless",
    "cc2541f256rhar",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CC2541F256RHAR",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-40-EP(6x6)",
    "pin_count": 41,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://www.ti.com/cn/lit/gpn/cc2541",
    "parts": {
      "symbol": "cc2541f256rhar.kicad_sym",
      "footprint": "cc2541f256rhar.kicad_mod",
      "model_3d": "cc2541f256rhar-etched.glb",
      "model_3d_plain": "cc2541f256rhar.glb",
      "model_3d_step": "cc2541f256rhar-etched.step",
      "model_3d_step_plain": "cc2541f256rhar.step",
      "lbr": "cc2541f256rhar.lbr"
    },
    "distributor_links": {
      "lcsc": "C22206"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground connection for digital circuit; must be connected to PCB ground plane and solid ground pour."
      },
      {
        "number": "2",
        "name": "SCL",
        "type": "bidirectional",
        "description": "I2C serial clock input or general-purpose I/O pin; leave floating if not used, disable internal pull-up if grounded."
      },
      {
        "number": "3",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data input/output or general-purpose I/O pin; leave floating if not used, disable internal pull-up if grounded."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; reserved pin that must not be connected to external circuitry."
      },
      {
        "number": "5",
        "name": "P1_5",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.5 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "6",
        "name": "P1_4",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.4 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "7",
        "name": "P1_3",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.3 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "8",
        "name": "P1_2",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.2 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "9",
        "name": "P1_1",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.1 pin with 20-mA drive capability for LED control or high-current output."
      },
      {
        "number": "10",
        "name": "DVDD2",
        "type": "power_in",
        "description": "2-V to 3.6-V digital power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "11",
        "name": "P1_0",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.0 pin with 20-mA drive capability for LED control or high-current output."
      },
      {
        "number": "12",
        "name": "P0_7",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.7 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "13",
        "name": "P0_6",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.6 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "14",
        "name": "P0_5",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.5 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "15",
        "name": "P0_4",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.4 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "16",
        "name": "P0_3",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.3 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "17",
        "name": "P0_2",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.2 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "18",
        "name": "P0_1",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.1 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "19",
        "name": "P0_0",
        "type": "bidirectional",
        "description": "General-purpose I/O port 0.0 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "20",
        "name": "RESET_N",
        "type": "input",
        "description": "Active-low asynchronous reset input; minimum pulse width 1 µs; must stay high during normal operation."
      },
      {
        "number": "21",
        "name": "AVDD5",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "22",
        "name": "XOSC_Q1",
        "type": "bidirectional",
        "description": "32-MHz crystal oscillator pin 1 or external clock input; connect to primary oscillator node or external clock source."
      },
      {
        "number": "23",
        "name": "XOSC_Q2",
        "type": "bidirectional",
        "description": "32-MHz crystal oscillator pin 2; connect to secondary oscillator node of 32-MHz crystal."
      },
      {
        "number": "24",
        "name": "AVDD3",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "25",
        "name": "RF_P",
        "type": "bidirectional",
        "description": "Positive differential RF signal input to low-noise amplifier during RX; positive output from power amplifier during TX."
      },
      {
        "number": "26",
        "name": "RF_N",
        "type": "bidirectional",
        "description": "Negative differential RF signal input to low-noise amplifier during RX; negative output from power amplifier during TX."
      },
      {
        "number": "27",
        "name": "AVDD2",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "28",
        "name": "AVDD1",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "29",
        "name": "AVDD4",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "30",
        "name": "RBIAS",
        "type": "input",
        "description": "Analog input for external precision bias resistor (56 kΩ ±1% recommended); sets internal reference current for on-chip biasing network."
      },
      {
        "number": "31",
        "name": "AVDD6",
        "type": "power_in",
        "description": "2-V to 3.6-V analog power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "32",
        "name": "P2_4/OSC32K_Q1",
        "type": "bidirectional",
        "description": "General-purpose I/O port 2.4 or 32.768-kHz crystal oscillator input pin 1; function selected by firmware configuration."
      },
      {
        "number": "33",
        "name": "P2_3/OSC32K_Q2",
        "type": "bidirectional",
        "description": "General-purpose I/O port 2.3 or 32.768-kHz crystal oscillator input pin 2; function selected by firmware configuration."
      },
      {
        "number": "34",
        "name": "P2_2",
        "type": "bidirectional",
        "description": "General-purpose I/O port 2.2 or debug clock input; dual function for in-circuit debugging."
      },
      {
        "number": "35",
        "name": "P2_1",
        "type": "bidirectional",
        "description": "General-purpose I/O port 2.1 or debug data input/output; dual function for in-circuit debugging."
      },
      {
        "number": "36",
        "name": "P2_0",
        "type": "bidirectional",
        "description": "General-purpose I/O port 2.0 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "37",
        "name": "P1_7",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.7 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "38",
        "name": "P1_6",
        "type": "bidirectional",
        "description": "General-purpose I/O port 1.6 pin; configurable as input or output with programmable pull-up/pull-down resistor."
      },
      {
        "number": "39",
        "name": "DVDD1",
        "type": "power_in",
        "description": "2-V to 3.6-V digital power supply input pin; requires 100-nF decoupling capacitor to ground."
      },
      {
        "number": "40",
        "name": "DCOUPL",
        "type": "power_out",
        "description": "1.8-V output from on-chip digital voltage regulator; requires 1-µF decoupling capacitor; do not use to supply external circuits."
      },
      {
        "number": "41",
        "name": "GND (Exposed Pad)",
        "type": "power_in",
        "description": "Thermal and mechanical ground connection from exposed die attach pad; must be soldered to solid PCB ground plane for proper heat dissipation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Exposed thermal/ground pad (pin 41) is shown in package diagram and application schematic but not ex; RF_P and RF_N pins require impedance matching network and balun transformer for proper antenna opera; Dual-function pins P2_1, P2_2, P2_3, P2_4 require careful firmware configuration to select between G",
          "1/41 pins cited to the wrong page (name found elsewhere): ['41:GND (Exposed Pad)@p16']"
        ],
        "pages_sent": 37,
        "cost_usd": 0.5225,
        "at": "2026-09-21T18:00:45"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/cc2541",
        "pages": 37,
        "sha256": "6a99abaeb2964fdb",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cc2541f256rhar.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          6,
          1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cc2541f256rhar-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          6,
          1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "491a685a77555d82cec1d2e2622c918484afec5f20b5a8eae0a9545099acf4d0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "WQFN-40-EP(6x6)",
      "Category": "RF And Wireless",
      "Pins": "41"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cc2541f256rhar"
  ],
  "discovery_pitch": "CC2541F256RHAR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "cc2541f256rhar.kicad_mod",
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    "cc2541f256rhar.step",
    "cc2541f256rhar.lbr",
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    "docs/cc2541f256rhar-datasheet.pdf",
    "viewers/symbol.html",
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T18:31:49.154Z"
}