# nRF52840-CKAA

**Nordic Semiconductor · multi-protocol Bluetooth LE 5.3 / Thread / Zigbee / 802.15.4 wireless SoC** — ARM Cortex-M4F @ 64 MHz, 1 MB flash, 256 KB RAM, USB 2.0 FS, NFC-A, Arm CryptoCell-310. Package **aQFN-73, 7×7×0.85 mm, 0.5 mm pitch**. Lifecycle: **Active**.

> This is a **reference "perfect chip" page** for the Adom Wiki — it shows the full set of things a component page should carry. The **3D model, interactive schematic symbol, interactive footprint, datasheet, and CAD downloads render natively above** (the wiki builds those from the files in this repo); the drill-downs below add the engineering, sourcing, and manufacturer data.

| | |
|---|---|
| **MPN** | nRF52840-CKAA (`-R` = tape & reel) |
| **Manufacturer** | Nordic Semiconductor |
| **Category** | Wireless MCU / Bluetooth LE SoC |
| **Core** | Arm Cortex-M4F @ 64 MHz, 1 MB flash, 256 KB RAM |
| **Radio** | 2.4 GHz: BLE 5.3, Bluetooth mesh, Thread, Zigbee, ANT, 802.15.4 |
| **Package** | aQFN-73, 7×7×0.85 mm, 0.5 mm pitch · 48 GPIO |
| **Datasheet** | [Product Specification (PDF)](docs/nRF52840_Product-Specification.pdf) · [Nordic infocenter](https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.10.pdf) |
| **Buy** | [Mouser](https://www.mouser.com/ProductDetail/Nordic-Semiconductor/nRF52840-CKAA-R?qs=PqoDHHvF64%2FDLCQsJ11t5w%3D%3D) · [DigiKey](https://www.digikey.com/en/products/result?keywords=nRF52840-CKAA-R) — ~$5.73 @ 1, in stock |

---

## ⎘ Open this chip in…

**Open directly** — works in any browser, Hydrogen webview, or pup:

<p>
<a href="/viewer/3d/component/nrf52840-ckaa" style="display:inline-block;padding:8px 14px;margin:3px;border:1px solid #2b6;border-radius:8px;background:rgba(0,184,177,.08);color:#7fe3dd;text-decoration:none;font-weight:600">🧊 3D viewer</a>
<a href="/viewer/symbol/component/nrf52840-ckaa" style="display:inline-block;padding:8px 14px;margin:3px;border:1px solid #2b6;border-radius:8px;background:rgba(0,184,177,.08);color:#7fe3dd;text-decoration:none;font-weight:600">🔣 Symbol viewer</a>
<a href="/viewer/footprint/component/nrf52840-ckaa" style="display:inline-block;padding:8px 14px;margin:3px;border:1px solid #2b6;border-radius:8px;background:rgba(0,184,177,.08);color:#7fe3dd;text-decoration:none;font-weight:600">👣 Footprint viewer</a>
<a href="docs/nRF52840_Product-Specification.pdf" style="display:inline-block;padding:8px 14px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none;font-weight:600">📄 Datasheet</a>
</p>

**Download** for your EDA tool:

<p>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.kicad_sym" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ KiCad symbol</a>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.kicad_mod" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ KiCad footprint</a>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.IntLib" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ Altium IntLib</a>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.lbr" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ Fusion .lbr</a>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.step" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ STEP</a>
<a href="/blob/component/nrf52840-ckaa/nRF52840-CKAA.glb" download style="display:inline-block;padding:7px 13px;margin:3px;border:1px solid #3a4250;border-radius:8px;background:rgba(255,255,255,.03);color:#cfd8e2;text-decoration:none">⬇ GLB</a>
</p>

**Open in a tool, or on your desktop** — paste any line into Claude Code (it opens it the right way for your context — Hydrogen webview, native browser, or pup):

```text
open the nRF52840-CKAA symbol in adom-symbol
open the nRF52840-CKAA footprint in adom-footprint
view the nRF52840-CKAA in adom-step (basic 3D)
check the nRF52840-CKAA chip-on-pads fit in adom-chipfit (fp3d)
validate the nRF52840-CKAA in adom-chipsmith
generate a Fusion .lbr for the nRF52840-CKAA with adom-lbr
open the nRF52840-CKAA in chip-fetcher
open the nRF52840-CKAA in KiCad on my desktop
open the nRF52840-CKAA in Fusion 360 on my desktop
send the nRF52840-CKAA library to my Downloads folder and open it
```

> *Altium / OrCAD desktop open isn't wired into adom-desktop yet — download the IntLib / files above and open them locally. A one-click "Open in…" toolbar with automatic context-aware launching is on the roadmap (see the skill's TODO).*

---

<details open>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">📐 Specifications</summary>
<table>
<tr><th>Parameter</th><th>Value</th></tr>
<tr><td>Core</td><td>Arm Cortex-M4 with FPU @ 64 MHz</td></tr>
<tr><td>Flash / RAM</td><td>1 MB / 256 KB</td></tr>
<tr><td>Radio protocols</td><td>Bluetooth LE 5.3, Bluetooth mesh, Thread, Zigbee, ANT, IEEE 802.15.4</td></tr>
<tr><td>TX power / RX sensitivity</td><td>up to +8 dBm / −95 dBm (BLE 1 Mbps)</td></tr>
<tr><td>GPIO</td><td>48 (P0.00–P0.31, P1.00–P1.15)</td></tr>
<tr><td>Peripherals</td><td>4× SPI, 2× I²C (TWI), 2× UART, I²S, PDM, 12-bit ADC (SAADC), PWM, QSPI, 5× timers, RTC, WDT, TEMP, RNG, COMP/LPCOMP, PPI/EasyDMA</td></tr>
<tr><td>USB</td><td>USB 2.0 Full-Speed device controller</td></tr>
<tr><td>NFC</td><td>NFC-A tag (P0.09 / P0.10, muxed)</td></tr>
<tr><td>Security</td><td>Arm CryptoCell-310, AES, TRNG; Arm TrustZone-style access port protection (APPROTECT)</td></tr>
<tr><td>Supply</td><td>1.7–5.5 V; on-chip buck DC/DC + LDO regulators (VDD / VDDH / VBUS)</td></tr>
<tr><td>Operating temp</td><td>−40 °C to +85 °C</td></tr>
</table>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">📌 Pin map (73 pads · 67 connected · 48 GPIO)</summary>
<p>Full interactive pinout is in the <b>Schematic Symbol</b> viewer above (hover any pin). Functional summary:</p>
<table>
<tr><th>Group</th><th>Count</th><th>Notes</th></tr>
<tr><td>GPIO P0.00–P0.31</td><td>32</td><td>General-purpose I/O; alt-functions for SPI/TWI/UART/PWM/SAADC/QSPI/NFC. P0.18 = configurable nRESET.</td></tr>
<tr><td>GPIO P1.00–P1.15</td><td>16</td><td>Second GPIO port.</td></tr>
<tr><td>Power / regulator</td><td>12</td><td>VDD, VDDH, VBUS, VSS, VSS_PA, DEC1/4/5/6 (decoupling), DCC/DCCH (DC/DC inductor), DECUSB.</td></tr>
<tr><td>Clock / crystal</td><td>2</td><td>XC1 / XC2 (32 MHz crystal). 32.768 kHz LFXO on GPIO or internal RC.</td></tr>
<tr><td>USB</td><td>2</td><td>D+ (K8), D− (J8); VBUS (J9).</td></tr>
<tr><td>Debug</td><td>2</td><td>SWDIO (J2), SWDCLK (H2).</td></tr>
<tr><td>Radio</td><td>1</td><td>ANT (E1) — single-ended 50 Ω antenna feed.</td></tr>
</table>
<p>The remaining aQFN balls are NC / ground-tie. Pin names/numbers are authored in the KiCad symbol and EAGLE/Altium libraries below.</p>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">💲 Sourcing &amp; availability</summary>
<p><b>Mouser</b> 949-NRF52840-CKAA-R · lifecycle <b>Active</b> · RoHS compliant · lead time ~140 days · <b>10,157 in stock</b> <i>(checked 2026-05-03)</i></p>
<table>
<tr><th>Qty</th><th>1</th><th>10</th><th>100</th><th>250</th><th>500</th><th>7000</th></tr>
<tr><td>Unit price</td><td>$5.73</td><td>$4.87</td><td>$4.76</td><td>$4.54</td><td>$4.14</td><td>$4.14</td></tr>
</table>
<p>Buy / check live: <a href="https://www.mouser.com/ProductDetail/Nordic-Semiconductor/nRF52840-CKAA-R?qs=PqoDHHvF64%2FDLCQsJ11t5w%3D%3D">Mouser ↗</a> · <a href="https://www.digikey.com/en/products/result?keywords=nRF52840-CKAA-R">DigiKey ↗</a> <i>(prices above are a dated snapshot, not live)</i></p>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">📦 Tape &amp; reel / pick-and-place</summary>
<ul>
<li><b>Packaging:</b> the <code>-R</code> suffix = <b>Tape &amp; Reel</b> (cut-tape available via Mouser/DigiKey custom reel).</li>
<li><b>Carrier tape:</b> EIA-481 embossed carrier; pocket position referenced to the sprocket holes (4.0 mm feed pitch). <b>Confirm pin-1 orientation against Nordic's tape-and-reel drawing</b> before programming the placement machine — don't assume.</li>
<li><b>Pin-1 orientation:</b> per IPC-7351 zero orientation, pin 1 is <b>top-left</b>; the footprint marks it with a square pad + silk dot. (IEC 61188-7 libraries put pin 1 bottom-left — check which a library follows.)</li>
<li><b>MSL:</b> Moisture Sensitivity Level <b>1</b> (per Nordic) — no bake required under normal floor life; still reflow per J-STD-020.</li>
</ul>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">🟤 Solder paste &amp; InstaPCB assembly</summary>
<p>The footprint ships a paste layer. For this <b>fine-pitch (0.5 mm) aQFN-73</b>, <b>InstaPCB</b> renders the paste as a <b>micro-dot aperture array</b> rather than full pads, to cut the paste volume that causes <b>bridging</b> between the staggered aQFN rows. Default is <b>lead-free (SAC305)</b>; a leaded profile is selectable.</p>
<ul>
<li>Open the <b>PCB Footprint</b> viewer above and toggle the <b>paste / solder-dot layer</b> to see the default aperture placement.</li>
<li>If the default micro-dot pattern bridges or starves joints on your build, <b>report it in <a href="#discussions">Discussions</a></b> with a photo — paste defaults improve from community feedback.</li>
<li>The exposed/center ground uses a windowpane dot array to control paste coverage and avoid float.</li>
</ul>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">🏭 Manufacturer &amp; resources (everything Nordic provides)</summary>
<p><b>Nordic Semiconductor — nRF52840</b></p>
<ul>
<li>Product page: <a href="https://www.nordicsemi.com/Products/nRF52840">nordicsemi.com/Products/nRF52840</a></li>
<li>Datasheet / Product Specification: <a href="docs/nRF52840_Product-Specification.pdf">local PDF</a> · <a href="https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.10.pdf">Nordic infocenter (v1.10)</a></li>
<li>Errata: <a href="https://docs.nordicsemi.com/category/nrf52840-errata">nRF52840 errata</a></li>
<li>Product Change Notification: <a href="docs/nRF52840-CKAA_Product-Change-Notification.pdf">local PDF</a></li>
<li>RoHS / compliance certificate: <a href="docs/nRF52840-CKAA_RoHS-Certificate.pdf">local PDF</a></li>
<li>SDK: <a href="https://www.nordicsemi.com/Products/Development-software/nRF-Connect-SDK">nRF Connect SDK</a> · tools: <a href="https://www.nordicsemi.com/Products/Development-tools/nRF-Connect-for-Desktop">nRF Connect for Desktop</a></li>
<li>Dev hardware: <a href="https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK">nRF52840 DK</a> · <a href="https://www.nordicsemi.com/Products/Development-hardware/nRF52840-Dongle">nRF52840 Dongle</a></li>
<li>Support: <a href="https://devzone.nordicsemi.com/">Nordic DevZone</a></li>
<li>CAD source for this page (STEP + KiCad + Altium + Fusion): <a href="https://app.ultralibrarian.com/details/Nordic-Semiconductor/NRF52840-CKAA?uid=134560212">Ultra Librarian</a></li>
</ul>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">🔀 Package variants</summary>
<table>
<tr><th>MPN</th><th>Package</th><th>Size</th><th>GPIO</th><th>Notes</th></tr>
<tr><td><b>nRF52840-CKAA</b></td><td>aQFN-73</td><td>7×7 mm</td><td>48</td><td>This page — exposes all GPIO; easiest to route.</td></tr>
<tr><td>nRF52840-QIAA</td><td>QFN-48</td><td>6×6 mm</td><td>48</td><td>Most common; smaller, all GPIO on a standard QFN.</td></tr>
<tr><td>nRF52840-QFAA</td><td>WLCSP-94</td><td>3.5×3.6 mm</td><td>48</td><td>Space-constrained designs; needs fine-line PCB.</td></tr>
</table>
</details>

<details>
<summary style="cursor:pointer;font-weight:700;font-size:1.1em;padding:8px 0">🔗 Related</summary>
<ul>
<li><b>nRF52 family:</b> nRF52833 (BLE 5.4, −40…105 °C), nRF52832 (BLE 5, 512 KB/64 KB), nRF52811/nRF52810 (cost-optimized).</li>
<li><b>Newer:</b> nRF5340 (dual-core), nRF54L15 (next-gen LP). <i>(Link their wiki pages as they're published.)</i></li>
<li><b>Molecules using this chip:</b> none published yet — breakouts/modules built on the nRF52840 will back-link here.</li>
</ul>
</details>

---

### CAD downloads

Every file is in the **downloads grid above** (and the Files tab). By tool:

| Tool | Files |
|---|---|
| **KiCad** | `nRF52840-CKAA.kicad_sym` · `nRF52840-CKAA.kicad_mod` · `nRF52840-CKAA.step` |
| **Fusion 360 / EAGLE** | `nRF52840-CKAA.lbr` (symbol + package + device) |
| **Altium** | `nRF52840-CKAA.IntLib` |
| **Universal** | `nRF52840-CKAA.step` (mechanical) · `nRF52840-CKAA.glb` (web/3D) |

CAD authored by **Nordic via Ultra Librarian**; 3D converted to GLB by `service-step2glb`. Provenance: [`meta/info.json`](meta/info.json), live snapshot [`meta/stock.json`](meta/stock.json), 3D extraction [`meta/nRF52840-CKAA-features.json`](meta/nRF52840-CKAA-features.json).

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*Published as a reference component page with the [Adom Wiki Skill Pack](https://wiki.adom.inc/john/adom-wiki-skillpack) `wiki-component` skill.*