AI05 from Sam wing, in a SOP-16. 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	GND	power_in	Ground / negative supply reference for the chip.
2	C1	passive	Internal balance/reference capacitor connection. Connect a 4.7 nF NPO capacitor to GND close to the IC.
3	CSEL	passive	Sensitivity-adjust capacitor pin. Optional external capacitor from 0 to 100 pF sets touch sensitivity (smaller = more sensitive). May be omitted in most cases.
4	KEY1	passive	Touch sensing input for channel 1. Connects to sensing pad through a 1 kΩ series resistor.
5	KEY2	passive	Touch sensing input for channel 2. Connects to sensing pad through a 1 kΩ series resistor.
6	KEY3	passive	Touch sensing input for channel 3. Connects to sensing pad through a 1 kΩ series resistor.
7	KEY4	passive	Touch sensing input for channel 4. Connects to sensing pad through a 1 kΩ series resistor.
8	KEY5	passive	Touch sensing input for channel 5. Connects to sensing pad through a 1 kΩ series resistor.
9	OUT5	output	Channel-5 key output. Polarity/behavior depends on MD pin: MD=VDD direct active-high, MD=GND toggle (self-lock), MD=floating active-low open-drain (needs pull-up). IO sink current typ 30 mA / max 40 mA at VDD=5 V.
10	OUT4	output	Channel-4 key output. Polarity/behavior depends on MD pin (see OUT5). IO sink current typ 30 mA / max 40 mA at VDD=5 V.
11	OUT3	output	Channel-3 key output. Polarity/behavior depends on MD pin (see OUT5). IO sink current typ 30 mA / max 40 mA at VDD=5 V.
12	OUT2	output	Channel-2 key output. Polarity/behavior depends on MD pin (see OUT5). IO sink current typ 30 mA / max 40 mA at VDD=5 V.
13	OUT1	output	Channel-1 key output. When MD=VDD direct active-high; MD=GND toggle self-lock; MD=floating OUT1 stays direct active-high push-pull (unlike OUT2-OUT5 which are open-drain when MD is floating).
14	SLEEP	input	Sleep-mode select. Tie to VDD to enable auto-sleep (~80 s of no touch enters low-power mode, I_sleep ≈ 45 µA typ). Tie to GND to disable sleep and keep the chip always active.
15	MD	input	Output-mode select (3-level). MD=VDD: OUT1-OUT5 direct output, active-high. MD=GND: OUT1-OUT5 toggle (self-lock) output, initial low. MD=floating: OUT1 direct active-high push-pull, OUT2-OUT5 active-low open-drain (needs external pull-up).
16	VDD	power_in	Positive supply, 2.5 V to 5.5 V. Typical operating current 0.8 mA at 3.0 V, 1.6 mA at 5.0 V. Recommend 100 nF decoupling and a 20 Ω series filter resistor as shown in the typical application.

Key specifications

Parameter	Value
Manufacturer	Sam wing
Package	SOP-16
Category	Sensors
Pins	16

Ordering variants

Same part, different packaging or reel option.

AI05SOP16L

CAD (KiCad official)

Symbol: AI05
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Sam wing datasheet (6 pp, sha256 4861a64d40a552e9, 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