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.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownnRF51822-QFAA-R
Nordic Semicon · Microcontrollers (MCU/MPU/SOC) · QFN-48-EP(6x6)
nRF51822-QFAA-R from Nordic Semicon, in a QFN-48-EP(6x6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply input, 1.8 V to 3.6 V. |
| 2 | DCC | power_out | DC/DC converter output voltage to external LC filter for power supply decoupling. |
| 3 | P0.30 | bidirectional | General purpose I/O pin P0.30 with configurable input/output direction. |
| 4 | P0.00 | bidirectional | General purpose I/O pin P0.00, also serves as ADC/LPCOMP reference input 0. |
| 5 | P0.01 | bidirectional | General purpose I/O pin P0.01, also serves as ADC/LPCOMP analog input 2. |
| 6 | P0.02 | bidirectional | General purpose I/O pin P0.02, also serves as ADC/LPCOMP analog input 3. |
| 7 | P0.03 | bidirectional | General purpose I/O pin P0.03, also serves as ADC/LPCOMP analog input 4. |
| 8 | P0.04 | bidirectional | General purpose I/O pin P0.04, also serves as ADC/LPCOMP analog input 5. |
| 9 | P0.05 | bidirectional | General purpose I/O pin P0.05, also serves as ADC/LPCOMP analog input 6. |
| 10 | P0.06 | bidirectional | General purpose I/O pin P0.06, also serves as ADC/LPCOMP input 7 and reference input 1. |
| 11 | P0.07 | bidirectional | General purpose I/O pin P0.07 with configurable input/output direction. |
| 12 | VDD | power_in | Power supply input, 1.8 V to 3.6 V. |
| 13 | VSS | power_in | Ground (0 V), must be connected to PCB ground plane. |
| 14 | P0.08 | bidirectional | General purpose I/O pin P0.08 with configurable input/output direction. |
| 15 | P0.09 | bidirectional | General purpose I/O pin P0.09 with configurable input/output direction. |
| 16 | P0.10 | bidirectional | General purpose I/O pin P0.10 with configurable input/output direction. |
| 17 | P0.11 | bidirectional | General purpose I/O pin P0.11 with configurable input/output direction. |
| 18 | P0.12 | bidirectional | General purpose I/O pin P0.12 with configurable input/output direction. |
| 19 | P0.13 | bidirectional | General purpose I/O pin P0.13 with configurable input/output direction. |
| 20 | P0.14 | bidirectional | General purpose I/O pin P0.14 with configurable input/output direction. |
| 21 | P0.15 | bidirectional | General purpose I/O pin P0.15 with configurable input/output direction. |
| 22 | P0.16 | bidirectional | General purpose I/O pin P0.16 with configurable input/output direction. |
| 23 | SWDIO/nRESET | bidirectional | System reset (active low) and Serial Wire Debug I/O, also configurable as GPIO. |
| 24 | SWDCLK | input | Serial Wire Debug clock input, must be kept low during device reset. |
| 25 | P0.17 | bidirectional | General purpose I/O pin P0.17 with configurable input/output direction. |
| 26 | P0.18 | bidirectional | General purpose I/O pin P0.18 with configurable input/output direction. |
| 27 | P0.19 | bidirectional | General purpose I/O pin P0.19 with configurable input/output direction. |
| 28 | P0.20 | bidirectional | General purpose I/O pin P0.20 with configurable input/output direction. |
| 29 | DEC2 | power_in | Power supply decoupling pin, connect 100 nF to 1 μF capacitor to ground. |
| 30 | VDD_PA | power_out | RF power amplifier supply output (+1.6 V), requires external LC filtering. |
| 31 | ANT1 | passive | Differential RF antenna connection for 2.4 GHz transceiver transmit and receive. |
| 32 | ANT2 | passive | Differential RF antenna connection for 2.4 GHz transceiver transmit and receive. |
| 33 | VSS | power_in | Ground (0 V), must be connected to PCB ground plane. |
| 34 | VSS | power_in | Ground (0 V), must be connected to PCB ground plane. |
| 35 | AVDD | power_in | Analog power supply input, 1.8 V to 3.6 V. |
| 36 | AVDD | power_in | Analog power supply input, 1.8 V to 3.6 V. |
| 37 | XC1 | passive | 16/32 MHz crystal oscillator connection for external crystal or clock reference. |
| 38 | XC2 | passive | 16/32 MHz crystal oscillator connection for external crystal. |
| 39 | DEC1 | power_in | Power supply decoupling pin, connect 1 nF to 47 nF capacitor to ground. |
| 40 | P0.21 | bidirectional | General purpose I/O pin P0.21 with configurable input/output direction. |
| 41 | P0.22 | bidirectional | General purpose I/O pin P0.22 with configurable input/output direction. |
| 42 | P0.23 | bidirectional | General purpose I/O pin P0.23 with configurable input/output direction. |
| 43 | P0.24 | bidirectional | General purpose I/O pin P0.24 with configurable input/output direction. |
| 44 | P0.25 | bidirectional | General purpose I/O pin P0.25 with configurable input/output direction. |
| 45 | P0.26 | bidirectional | General purpose I/O pin P0.26, also serves as ADC input 0 and 32.768 kHz crystal output. |
| 46 | P0.27 | bidirectional | General purpose I/O pin P0.27, also serves as ADC input 1 and 32.768 kHz crystal input/reference. |
| 47 | P0.28 | bidirectional | General purpose I/O pin P0.28 with configurable input/output direction. |
| 48 | P0.29 | bidirectional | General purpose I/O pin P0.29 with configurable input/output direction. |
| 49 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nordic Semicon |
| Package | QFN-48-EP(6x6) |
| Category | Embedded Processors & Controllers |
| Pins | 49 |
CAD (KiCad official)
- Symbol:
nRF51822-QFAA-R - Footprint:
Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.4x4.4mm - 3D model: QFN-48-EP(6x6), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
nrf51822-qfaa-r-etched.step/nrf51822-qfaa-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);nrf51822-qfaa-r.step/nrf51822-qfaa-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nordic Semicon datasheet (72 pp, sha256
9132b1856f61beae, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).