component
nRF51822-QFAA-R
Public Made by Adomby adom
Nordic Semicon Microcontrollers (MCU/MPU/SOC), QFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "nrf51822-qfaa-r",
"title": "nRF51822-QFAA-R",
"brief": "Nordic Semicon Microcontrollers (MCU/MPU/SOC), QFN-48-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",
"embedded processors & controllers",
"nrf51822-qfaa-r",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "nRF51822-QFAA-R",
"manufacturer": "Nordic Semicon",
"package": "QFN-48-EP(6x6)",
"pin_count": 49,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175089775136768",
"parts": {
"symbol": "nrf51822-qfaa-r.kicad_sym",
"footprint": "nrf51822-qfaa-r.kicad_mod",
"model_3d": "nrf51822-qfaa-r-etched.glb",
"model_3d_plain": "nrf51822-qfaa-r.glb",
"model_3d_step": "nrf51822-qfaa-r-etched.step",
"model_3d_step_plain": "nrf51822-qfaa-r.step",
"lbr": "nrf51822-qfaa-r.lbr"
},
"distributor_links": {
"lcsc": "C38167",
"digikey": "NRF51822-QFAA-R-ND",
"mouser": "949-NRF51822-QFAA-R"
},
"distributor_check": {
"checked_at": "2026-10-01T17:32:33Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "NRF51822-QFAA-R-ND",
"status": "found"
},
"mouser": {
"pn": "949-NRF51822-QFAA-R",
"status": "found",
"lifecycle": "Obsolete"
}
},
"pins": [
{
"number": "1",
"name": "VDD",
"type": "power_in",
"description": "Power supply input, 1.8 V to 3.6 V."
},
{
"number": "2",
"name": "DCC",
"type": "power_out",
"description": "DC/DC converter output voltage to external LC filter for power supply decoupling."
},
{
"number": "3",
"name": "P0.30",
"type": "bidirectional",
"description": "General purpose I/O pin P0.30 with configurable input/output direction."
},
{
"number": "4",
"name": "P0.00",
"type": "bidirectional",
"description": "General purpose I/O pin P0.00, also serves as ADC/LPCOMP reference input 0."
},
{
"number": "5",
"name": "P0.01",
"type": "bidirectional",
"description": "General purpose I/O pin P0.01, also serves as ADC/LPCOMP analog input 2."
},
{
"number": "6",
"name": "P0.02",
"type": "bidirectional",
"description": "General purpose I/O pin P0.02, also serves as ADC/LPCOMP analog input 3."
},
{
"number": "7",
"name": "P0.03",
"type": "bidirectional",
"description": "General purpose I/O pin P0.03, also serves as ADC/LPCOMP analog input 4."
},
{
"number": "8",
"name": "P0.04",
"type": "bidirectional",
"description": "General purpose I/O pin P0.04, also serves as ADC/LPCOMP analog input 5."
},
{
"number": "9",
"name": "P0.05",
"type": "bidirectional",
"description": "General purpose I/O pin P0.05, also serves as ADC/LPCOMP analog input 6."
},
{
"number": "10",
"name": "P0.06",
"type": "bidirectional",
"description": "General purpose I/O pin P0.06, also serves as ADC/LPCOMP input 7 and reference input 1."
},
{
"number": "11",
"name": "P0.07",
"type": "bidirectional",
"description": "General purpose I/O pin P0.07 with configurable input/output direction."
},
{
"number": "12",
"name": "VDD",
"type": "power_in",
"description": "Power supply input, 1.8 V to 3.6 V."
},
{
"number": "13",
"name": "VSS",
"type": "power_in",
"description": "Ground (0 V), must be connected to PCB ground plane."
},
{
"number": "14",
"name": "P0.08",
"type": "bidirectional",
"description": "General purpose I/O pin P0.08 with configurable input/output direction."
},
{
"number": "15",
"name": "P0.09",
"type": "bidirectional",
"description": "General purpose I/O pin P0.09 with configurable input/output direction."
},
{
"number": "16",
"name": "P0.10",
"type": "bidirectional",
"description": "General purpose I/O pin P0.10 with configurable input/output direction."
},
{
"number": "17",
"name": "P0.11",
"type": "bidirectional",
"description": "General purpose I/O pin P0.11 with configurable input/output direction."
},
{
"number": "18",
"name": "P0.12",
"type": "bidirectional",
"description": "General purpose I/O pin P0.12 with configurable input/output direction."
},
{
"number": "19",
"name": "P0.13",
"type": "bidirectional",
"description": "General purpose I/O pin P0.13 with configurable input/output direction."
},
{
"number": "20",
"name": "P0.14",
"type": "bidirectional",
"description": "General purpose I/O pin P0.14 with configurable input/output direction."
},
{
"number": "21",
"name": "P0.15",
"type": "bidirectional",
"description": "General purpose I/O pin P0.15 with configurable input/output direction."
},
{
"number": "22",
"name": "P0.16",
"type": "bidirectional",
"description": "General purpose I/O pin P0.16 with configurable input/output direction."
},
{
"number": "23",
"name": "SWDIO/nRESET",
"type": "bidirectional",
"description": "System reset (active low) and Serial Wire Debug I/O, also configurable as GPIO."
},
{
"number": "24",
"name": "SWDCLK",
"type": "input",
"description": "Serial Wire Debug clock input, must be kept low during device reset."
},
{
"number": "25",
"name": "P0.17",
"type": "bidirectional",
"description": "General purpose I/O pin P0.17 with configurable input/output direction."
},
{
"number": "26",
"name": "P0.18",
"type": "bidirectional",
"description": "General purpose I/O pin P0.18 with configurable input/output direction."
},
{
"number": "27",
"name": "P0.19",
"type": "bidirectional",
"description": "General purpose I/O pin P0.19 with configurable input/output direction."
},
{
"number": "28",
"name": "P0.20",
"type": "bidirectional",
"description": "General purpose I/O pin P0.20 with configurable input/output direction."
},
{
"number": "29",
"name": "DEC2",
"type": "power_in",
"description": "Power supply decoupling pin, connect 100 nF to 1 μF capacitor to ground."
},
{
"number": "30",
"name": "VDD_PA",
"type": "power_out",
"description": "RF power amplifier supply output (+1.6 V), requires external LC filtering."
},
{
"number": "31",
"name": "ANT1",
"type": "passive",
"description": "Differential RF antenna connection for 2.4 GHz transceiver transmit and receive."
},
{
"number": "32",
"name": "ANT2",
"type": "passive",
"description": "Differential RF antenna connection for 2.4 GHz transceiver transmit and receive."
},
{
"number": "33",
"name": "VSS",
"type": "power_in",
"description": "Ground (0 V), must be connected to PCB ground plane."
},
{
"number": "34",
"name": "VSS",
"type": "power_in",
"description": "Ground (0 V), must be connected to PCB ground plane."
},
{
"number": "35",
"name": "AVDD",
"type": "power_in",
"description": "Analog power supply input, 1.8 V to 3.6 V."
},
{
"number": "36",
"name": "AVDD",
"type": "power_in",
"description": "Analog power supply input, 1.8 V to 3.6 V."
},
{
"number": "37",
"name": "XC1",
"type": "passive",
"description": "16/32 MHz crystal oscillator connection for external crystal or clock reference."
},
{
"number": "38",
"name": "XC2",
"type": "passive",
"description": "16/32 MHz crystal oscillator connection for external crystal."
},
{
"number": "39",
"name": "DEC1",
"type": "power_in",
"description": "Power supply decoupling pin, connect 1 nF to 47 nF capacitor to ground."
},
{
"number": "40",
"name": "P0.21",
"type": "bidirectional",
"description": "General purpose I/O pin P0.21 with configurable input/output direction."
},
{
"number": "41",
"name": "P0.22",
"type": "bidirectional",
"description": "General purpose I/O pin P0.22 with configurable input/output direction."
},
{
"number": "42",
"name": "P0.23",
"type": "bidirectional",
"description": "General purpose I/O pin P0.23 with configurable input/output direction."
},
{
"number": "43",
"name": "P0.24",
"type": "bidirectional",
"description": "General purpose I/O pin P0.24 with configurable input/output direction."
},
{
"number": "44",
"name": "P0.25",
"type": "bidirectional",
"description": "General purpose I/O pin P0.25 with configurable input/output direction."
},
{
"number": "45",
"name": "P0.26",
"type": "bidirectional",
"description": "General purpose I/O pin P0.26, also serves as ADC input 0 and 32.768 kHz crystal output."
},
{
"number": "46",
"name": "P0.27",
"type": "bidirectional",
"description": "General purpose I/O pin P0.27, also serves as ADC input 1 and 32.768 kHz crystal input/reference."
},
{
"number": "47",
"name": "P0.28",
"type": "bidirectional",
"description": "General purpose I/O pin P0.28 with configurable input/output direction."
},
{
"number": "48",
"name": "P0.29",
"type": "bidirectional",
"description": "General purpose I/O pin P0.29 with configurable input/output direction."
},
{
"number": "49",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"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": [],
"pages_sent": 72,
"cost_usd": 0.8375,
"at": "2026-10-01T17:32:05"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175089775136768",
"pages": 72,
"sha256": "9132b1856f61beae",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 49,
"described": 49,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
}
},
"metadata": {
"specs": {
"Manufacturer": "Nordic Semicon",
"Package": "QFN-48-EP(6x6)",
"Category": "Embedded Processors & Controllers",
"Pins": "49"
}
},
"variants": [],
"sections": [
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"discovery_triggers": [
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"discovery_pitch": "nRF51822-QFAA-R (Nordic Semicon) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
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"visibility": {
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}