C8051F350-GQR from SKYWORKS SILICON LABS, in a TQFP-32(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	AIN0.0	input	ADC0 analog input channel 0.
2	AIN0.1	input	ADC0 analog input channel 1.
3	AIN0.2	input	ADC0 analog input channel 2.
4	AIN0.3	input	ADC0 analog input channel 3.
5	AIN0.4	input	ADC0 analog input channel 4 (present on C8051F350/2 24-bit ADC variants).
6	AIN0.5	input	ADC0 analog input channel 5 (present on C8051F350/2).
7	AIN0.6	input	ADC0 analog input channel 6 (present on C8051F350/2).
8	AIN0.7	input	ADC0 analog input channel 7 (present on C8051F350/2).
9	AGND	power_in	Analog ground. Must be tied to ground.
10	AV+	power_in	Analog supply voltage. Must be tied to +2.7 V to +3.6 V.
11	P2.0/C2D	bidirectional	Port 2.0 general-purpose digital I/O; also serves as the bi-directional data signal (C2D) for the C2 debug interface.
12	/RST/C2CK	bidirectional	Device reset. Open-drain output of the internal POR / VDD monitor; drive low ≥15 µs to reset. Also serves as the C2 debug clock (C2CK). 1 kΩ pull-up to VDD recommended.
13	P0.0	bidirectional	Port 0.0. Digital I/O with analog-input capability (5 V tolerant).
14	P0.1	bidirectional	Port 0.1. Digital I/O with analog-input capability (5 V tolerant).
15	P0.2/XTAL1	bidirectional	Port 0.2 digital I/O with analog-input capability; alternate function XTAL1 is the external oscillator return for a crystal or resonator.
16	P0.3/XTAL2	bidirectional	Port 0.3 digital I/O; alternate function XTAL2 is the excitation driver for an external crystal or resonator, or a clock input for CMOS/C/RC configurations.
17	P0.4	bidirectional	Port 0.4. Digital I/O with analog-input capability (5 V tolerant).
18	P0.5	bidirectional	Port 0.5. Digital I/O with analog-input capability (5 V tolerant).
19	P0.6/CNVSTR	bidirectional	Port 0.6 digital I/O; alternate function CNVSTR is the external convert-start input for the IDACs.
20	P0.7	bidirectional	Port 0.7. Digital I/O with analog-input capability (5 V tolerant).
21	VDD	power_in	Digital supply voltage. Must be tied to +2.7 V to +3.6 V.
22	DGND	power_in	Digital ground. Must be tied to ground.
23	P1.0	bidirectional	Port 1.0. Digital I/O with analog-input capability (5 V tolerant). AIN0.4 mux only present on C8051F351/3.
24	P1.1	bidirectional	Port 1.1. Digital I/O with analog-input capability (5 V tolerant).
25	P1.2	bidirectional	Port 1.2. Digital I/O with analog-input capability (5 V tolerant).
26	P1.3	bidirectional	Port 1.3. Digital I/O with analog-input capability (5 V tolerant).
27	P1.4	bidirectional	Port 1.4. Digital I/O with analog-input capability (5 V tolerant).
28	P1.5	bidirectional	Port 1.5. Digital I/O with analog-input capability (5 V tolerant).
29	P1.6/IDA0	bidirectional	Port 1.6 digital I/O; alternate function IDA0 is the current-output DAC0 analog output.
30	P1.7/IDA1	bidirectional	Port 1.7 digital I/O; alternate function IDA1 is the current-output DAC1 analog output.
31	VREF+	bidirectional	ADC/DAC positive voltage reference pin. Can be driven externally or connected to the on-chip reference.
32	VREF-	bidirectional	ADC negative voltage reference pin. Can be driven externally or tied to AGND for single-ended reference use.

Key specifications

Parameter	Value
Manufacturer	SKYWORKS SILICON LABS
Package	TQFP-32(7x7)
Category	MCU
Pins	32

Ordering variants

C8051F350-GQR
C8051F350-GQRGM
C8051F350-GQRGMR

CAD (KiCad official)

Symbol: C8051F350-GQR
Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
3D model: TQFP-32(7x7) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`c8051f350-gqr.step`	413 KB	You want the bare part, or you mark your own boards.
`c8051f350-gqr-etched.step`	4.2 MB	You want the part with `C8051F350-GQR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1018 faces against 507 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: SKYWORKS SILICON LABS datasheet (234 pp, sha256 7246a42c1e3bc68f, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF