XW09A

@@ -0,0 +1,56 @@+# XW09A++**Sam wing** · Touch Sensors · SOP-16++XW09A 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 | Power ground (0V) reference for the chip. |+| 2 | C1 | passive | Internal balance capacitor interface. Connect an external NPO capacitor (1nF-10nF range, 4.7nF recommended) between this pin and GND. |+| 3 | CSEL | passive | Sensitivity adjustment capacitor interface. Connect an external capacitor (0-100pF) between this pin and GND; smaller capacitance yields higher sensitivity, and leaving it open gives maximum sensitivity. |+| 4 | PAD0 | input | Capacitive touch key input channel 0. Connect to a touch sensing pad (typ. 3-30mm square/round conductor) via a series 1k resistor; leave floating if unused. |+| 5 | PAD1 | input | Capacitive touch key input channel 1. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 6 | PAD2 | input | Capacitive touch key input channel 2. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 7 | PAD3 | input | Capacitive touch key input channel 3. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 8 | PAD4 | input | Capacitive touch key input channel 4. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 9 | PAD5 | input | Capacitive touch key input channel 5. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 10 | PAD6 | input | Capacitive touch key input channel 6. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 11 | PAD7 | input | Capacitive touch key input channel 7. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 12 | PAD8 | input | Capacitive touch key input channel 8. Connect to a touch sensing pad via a series 1k resistor; leave floating if unused. |+| 13 | INT | output | Key-valid interrupt output (open-drain). Asserts low when a touch key is active; requires an external pull-up resistor (typ. 10k) to VDD. |+| 14 | SCL | input | I2C serial clock line (up to 400 kbit/s). Requires an external pull-up resistor (typ. 10k) to VDD. XW09A operates as an I2C slave (read-only). |+| 15 | SDA | bidirectional | I2C serial data line. Requires an external pull-up resistor (typ. 10k) to VDD. Slave address A[6:0]=0x40 (full 8-bit read address 0x81). Also used as a sleep-cancel input: pulling SDA low at least every 20s keeps the device out of sleep mode. |+| 16 | VDD | power_in | Positive supply input. Operating range 2.5V to 5.5V (absolute max 6.0V). Typical operating current 0.8mA @ 3.0V, 1.6mA @ 5.0V; sleep current ~90uA. Decouple with 100nF close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Sam wing |+| Package | SOP-16 |+| Category | Sensor |+| Pins | 16 |++## Ordering variants++- `XW09ASOP16L`++## CAD (KiCad official)++- Symbol: `XW09A`+- 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](docs/xw09a-datasheet.pdf) (6 pp, sha256 `6524ad9322c04543`, 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](docs/xw09a-datasheet.pdf)

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