PFC161-S08A from PADAUK Tech, in a SOIC-8. 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	VDD/AVDD	power_in	Positive supply. VDD is the IC digital supply and AVDD is the analog positive supply; the two are internally double-bonded and must be tied to the same rail externally.
2	PA7	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: external crystal (XTAL) pin, touch key TK10, and touch CS capacitor pin.
3	PA6	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: touch key TK8 and used as a programming (writer) pin.
4	PA5	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: TM3 PWM output, touch key TK9, external interrupt INT0A, and external reset (PRSTB). A 33Ω series resistor is recommended when used as an input in high-EFT environments.
5	PA3	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: comparator negative input CIN-, TM2 PWM output, touch key TK5, and programming (writer) pin.
6	PA4	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: comparator CIN+/CIN- inputs, TM3 PWM output, and touch key TK6.
7	PA0	bidirectional	General-purpose I/O with Schmitt-trigger input and CMOS drive; optional pull-up, pull-down, and wake-up. Alternate functions: comparator output CO, TM2 PWM output, touch key TK7, and external interrupt INT0.
8	GND/AGND	power_in	Ground reference. GND is the digital ground and AGND is the analog ground; the two are internally double-bonded and must be tied to the same ground externally.

Key specifications

Parameter	Value
Manufacturer	PADAUK Tech
Package	SOIC-8
Category	MCU
Pins	8

Ordering variants

Same part, different packaging or reel option.

PFC161-S08A
PFC161-S08AS08B
PFC161-S08AU06
PFC161-S08A2N08
PFC161-S08AEY10

CAD (KiCad official)

Symbol: PFC161-S08A
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pfc161-s08a.step`	122 KB	You want the bare part, or you mark your own boards.
`pfc161-s08a-etched.step`	2.3 MB	You want the part with `PFC161-S08A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 553 faces against 147 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: PADAUK Tech datasheet (70 pp, sha256 288e7d92459ab774, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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