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) · Nordic infocenter
Buy	Mouser · DigiKey — ~$5.73 @ 1, in stock

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⎘ Open this chip in…

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

🧊 3D viewer 🔣 Symbol viewer 👣 Footprint viewer 📄 Datasheet

Download for your EDA tool:

⬇ KiCad symbol ⬇ KiCad footprint ⬇ Altium IntLib ⬇ Fusion .lbr ⬇ STEP ⬇ GLB

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):

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).

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📐 Specifications

Parameter	Value
Core	Arm Cortex-M4 with FPU @ 64 MHz
Flash / RAM	1 MB / 256 KB
Radio protocols	Bluetooth LE 5.3, Bluetooth mesh, Thread, Zigbee, ANT, IEEE 802.15.4
TX power / RX sensitivity	up to +8 dBm / −95 dBm (BLE 1 Mbps)
GPIO	48 (P0.00–P0.31, P1.00–P1.15)
Peripherals	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
USB	USB 2.0 Full-Speed device controller
NFC	NFC-A tag (P0.09 / P0.10, muxed)
Security	Arm CryptoCell-310, AES, TRNG; Arm TrustZone-style access port protection (APPROTECT)
Supply	1.7–5.5 V; on-chip buck DC/DC + LDO regulators (VDD / VDDH / VBUS)
Operating temp	−40 °C to +85 °C

📌 Pin map (73 pads · 67 connected · 48 GPIO)

Full interactive pinout is in the Schematic Symbol viewer above (hover any pin). Functional summary:

Group	Count	Notes
GPIO P0.00–P0.31	32	General-purpose I/O; alt-functions for SPI/TWI/UART/PWM/SAADC/QSPI/NFC. P0.18 = configurable nRESET.
GPIO P1.00–P1.15	16	Second GPIO port.
Power / regulator	12	VDD, VDDH, VBUS, VSS, VSS_PA, DEC1/4/5/6 (decoupling), DCC/DCCH (DC/DC inductor), DECUSB.
Clock / crystal	2	XC1 / XC2 (32 MHz crystal). 32.768 kHz LFXO on GPIO or internal RC.
USB	2	D+ (K8), D− (J8); VBUS (J9).
Debug	2	SWDIO (J2), SWDCLK (H2).
Radio	1	ANT (E1) — single-ended 50 Ω antenna feed.

The remaining aQFN balls are NC / ground-tie. Pin names/numbers are authored in the KiCad symbol and EAGLE/Altium libraries below.

💲 Sourcing & availability

Mouser 949-NRF52840-CKAA-R · lifecycle Active · RoHS compliant · lead time ~140 days · 10,157 in stock (checked 2026-05-03)

Qty	1	10	100	250	500	7000
Unit price	$5.73	$4.87	$4.76	$4.54	$4.14	$4.14

Buy / check live: Mouser ↗ · DigiKey ↗ (prices above are a dated snapshot, not live)

📦 Tape & reel / pick-and-place

• Packaging: the -R suffix = Tape & Reel (cut-tape available via Mouser/DigiKey custom reel).
• Carrier tape: EIA-481 embossed carrier; pocket position referenced to the sprocket holes (4.0 mm feed pitch). Confirm pin-1 orientation against Nordic's tape-and-reel drawing before programming the placement machine — don't assume.
• Pin-1 orientation: per IPC-7351 zero orientation, pin 1 is top-left; the footprint marks it with a square pad + silk dot. (IEC 61188-7 libraries put pin 1 bottom-left — check which a library follows.)
• MSL: Moisture Sensitivity Level 1 (per Nordic) — no bake required under normal floor life; still reflow per J-STD-020.

🟤 Solder paste & InstaPCB assembly

The footprint ships a paste layer. For this fine-pitch (0.5 mm) aQFN-73, InstaPCB renders the paste as a micro-dot aperture array rather than full pads, to cut the paste volume that causes bridging between the staggered aQFN rows. Default is lead-free (SAC305); a leaded profile is selectable.

• Open the PCB Footprint viewer above and toggle the paste / solder-dot layer to see the default aperture placement.
• If the default micro-dot pattern bridges or starves joints on your build, report it in Discussions with a photo — paste defaults improve from community feedback.
• The exposed/center ground uses a windowpane dot array to control paste coverage and avoid float.

🏭 Manufacturer & resources (everything Nordic provides)

Nordic Semiconductor — nRF52840

• Product page: nordicsemi.com/Products/nRF52840
• Datasheet / Product Specification: local PDF · Nordic infocenter (v1.10)
• Errata: nRF52840 errata
• Product Change Notification: local PDF
• RoHS / compliance certificate: local PDF
• SDK: nRF Connect SDK · tools: nRF Connect for Desktop
• Dev hardware: nRF52840 DK · nRF52840 Dongle
• Support: Nordic DevZone
• CAD source for this page (STEP + KiCad + Altium + Fusion): Ultra Librarian

🔀 Package variants

MPN	Package	Size	GPIO	Notes
nRF52840-CKAA	aQFN-73	7×7 mm	48	This page — exposes all GPIO; easiest to route.
nRF52840-QIAA	QFN-48	6×6 mm	48	Most common; smaller, all GPIO on a standard QFN.
nRF52840-QFAA	WLCSP-94	3.5×3.6 mm	48	Space-constrained designs; needs fine-line PCB.

🔗 Related

• nRF52 family: nRF52833 (BLE 5.4, −40…105 °C), nRF52832 (BLE 5, 512 KB/64 KB), nRF52811/nRF52810 (cost-optimized).
• Newer: nRF5340 (dual-core), nRF54L15 (next-gen LP). (Link their wiki pages as they're published.)
• Molecules using this chip: none published yet — breakouts/modules built on the nRF52840 will back-link here.

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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, live snapshot meta/stock.json, 3D extraction meta/nRF52840-CKAA-features.json.

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Published as a reference component page with the Adom Wiki Skill Pack wiki-component skill.