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NRF51822-QFAC-R

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Nordic Semicon RF Transceiver ICs, QFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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NRF51822-QFAC-R

Nordic Semicon · RF Transceiver ICs · QFN-48-EP(6x6)

NRF51822-QFAC-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; Table 20 gives a supply range of 1.8 V to 3.6 V with the internal LDO setup.
2 DCC power_out DC/DC converter output voltage to an external LC filter.
3 P0.30 bidirectional General purpose digital I/O pin.
4 P0.00 (AREF0) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP reference input 0.
5 P0.01 (AIN2) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 2.
6 P0.02 (AIN3) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 3.
7 P0.03 (AIN4) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 4.
8 P0.04 (AIN5) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 5.
9 P0.05 (AIN6) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 6.
10 P0.06 (AIN7/AREF1) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 7 and ADC/LPCOMP reference input 1.
11 P0.07 bidirectional General purpose digital I/O pin.
12 VDD power_in Power supply input; Table 20 gives a supply range of 1.8 V to 3.6 V with the internal LDO setup.
13 VSS power_in Ground (0 V); must be connected to the exposed center pad and the PCB ground.
14 P0.08 bidirectional General purpose digital I/O pin.
15 P0.09 bidirectional General purpose digital I/O pin.
16 P0.10 bidirectional General purpose digital I/O pin.
17 P0.11 bidirectional General purpose digital I/O pin.
18 P0.12 bidirectional General purpose digital I/O pin.
19 P0.13 bidirectional General purpose digital I/O pin.
20 P0.14 bidirectional General purpose digital I/O pin.
21 P0.15 bidirectional General purpose digital I/O pin.
22 P0.16 bidirectional General purpose digital I/O pin.
23 SWDIO/nRESET bidirectional System reset input (active low) and hardware debug and flash programming I/O (SWDIO).
24 SWDCLK input Serial Wire Debug clock input used for hardware debug and flash programming.
25 P0.17 bidirectional General purpose digital I/O pin.
26 P0.18 bidirectional General purpose digital I/O pin.
27 P0.19 bidirectional General purpose digital I/O pin.
28 P0.20 bidirectional General purpose digital I/O pin.
29 DEC2 power_in Power supply decoupling pin; per Table 19 DEC2 must not exceed 2 V.
30 VDD_PA power_out Power supply output (+1.6 V) for the on-chip RF power amplifier.
31 ANT1 passive Differential RF antenna connection (TX and RX) that requires a matching network to a 50 Ω antenna.
32 ANT2 passive Differential RF antenna connection (TX and RX) that requires a matching network to a 50 Ω antenna.
33 VSS power_in Ground (0 V).
34 VSS power_in Ground (0 V).
35 AVDD power_in Analog power supply for the radio.
36 AVDD power_in Analog power supply for the radio.
37 XC1 input Connection for a 16/32 MHz crystal or an external 16 MHz clock reference.
38 XC2 output Connection for a 16/32 MHz crystal.
39 DEC1 power_in Power supply decoupling pin.
40 P0.21 bidirectional General purpose digital I/O pin.
41 P0.22 bidirectional General purpose digital I/O pin.
42 P0.23 bidirectional General purpose digital I/O pin.
43 P0.24 bidirectional General purpose digital I/O pin.
44 P0.25 bidirectional General purpose digital I/O pin.
45 P0.26 (AIN0/XL2) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 0 and the 32.768 kHz crystal connection XL2.
46 P0.27 (AIN1/XL1) bidirectional General purpose digital I/O pin that also serves as ADC/LPCOMP analog input 1 and the 32.768 kHz crystal or external clock reference connection XL1.
47 P0.28 bidirectional General purpose digital I/O pin.
48 P0.29 bidirectional General purpose digital I/O pin.
49 VSS 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 RF & Radio
Pins 49

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VDD VDD -0.3 3.9 V 38
I/O pin voltage VIO -0.3 V 38
Storage temperature -40 125 °C Environmental QFN48 package 38
Supply voltage, internal LDO setup VDD 1.8 3 3.6 V Internal LDO setup 39
Supply voltage, DC/DC converter setup VDD 2.1 3 3.6 V DC/DC converter setup 39
Supply voltage, low voltage mode setup VDD 1.75 1.8 1.95 V Low voltage mode setup; DEC2 shall be connected to VDD in this mode 39
Operating temperature TA -25 25 75 °C 39
Frequency tolerance, 16 MHz crystal oscillator fTOL,X16M -50 50 ppm 41
Frequency tolerance, Bluetooth low energy applications, 16 MHz crystal oscillator fTOL,X16M,BLE -40 40 ppm 41
Frequency tolerance, 32 MHz crystal oscillator fTOL,X32M -50 50 ppm 42
Frequency tolerance, Bluetooth low energy applications, 32 MHz crystal oscillator fTOL,X32M,BLE -40 40 ppm 42
Frequency tolerance, 16 MHz RC oscillator fTOL,RC16M -5 5 % 43
Frequency tolerance, 32.768 kHz crystal oscillator, Bluetooth low energy applications fTOL,X32k,BLE -250 250 ppm 43
Frequency tolerance, 32.768 kHz RC oscillator fTOL,RC32k -2 2 % 44
Frequency tolerance, 32.768 kHz RC oscillator calibration interval fTOL,CAL,RC32k -250 250 ppm Calibration interval 4 s 44
Frequency tolerance, 32.768 kHz synthesized oscillator, from 16M XOSC fTOL,XO16M -8 8 ppm 44
Frequency tolerance, 32.768 kHz synthesized oscillator, from 32M XOSC fTOL,XO32M -8 8 ppm 44
Threshold voltage tolerance VTOL -5 5 % 45
Power on reset time, 10 μs rise time tPOR, 10 μs 0.7 2.4 19 ms 10 μs rise time (0 V to VDD) 46
Power on reset time, 1 ms rise time tPOR, 1 ms 1.7 3.4 20 ms 1 ms rise time (0 V to VDD) 46
Power on reset time, 10 ms rise time tPOR, 10 ms 11 12 28 ms 10 ms rise time (0 V to VDD) 46
Power on reset time, 100 ms rise time tPOR, 100 ms 68 101 115 ms 100 ms rise time (0 V to VDD) 46
Operating frequencies fOP 2400 2483 MHz 1 MHz channel spacing 50
Frequency deviation at 250 kbps Δf250 -170 170 kHz 50
Frequency deviation at 1 Mbps Δf1M -170 170 kHz 50
Frequency deviation at 2 Mbps Δf2M -320 320 kHz 50
Frequency deviation at BLE ΔfBLE 225 250 275 kHz 50
On-air data rate bpsFSK 250 2000 kbps 50
Pull-up resistance RPU 11 13 16 kΩ 66
Pull-down resistance RPD 11 13 16 kΩ 66
Time between sampling signals from Quadrature Decoder tSAMPLE 128 16384 μs 64
Time from LED is turned on to signals are sampled tLED 0 511 μs Only valid for optical sensors 64

CAD (KiCad official)

  • Symbol: NRF51822-QFAC-R
  • Footprint: Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.2x4.2mm
  • 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-qfac-r-etched.step / nrf51822-qfac-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); nrf51822-qfac-r.step / nrf51822-qfac-r.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nordic Semicon datasheet (130 pp, sha256 3ed0b4fca3ce6b0d, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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).

Datasheet PDF