W25X20CLSNIG

@@ -0,0 +1,50 @@+# W25X20CLSNIG++**Winbond Elec** · NOR FLASH · SOIC-8++W25X20CLSNIG from Winbond Elec, 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 | /CS | input | Active-low SPI Chip Select input. When /CS is high the device is deselected and DO/IO0/IO1 are high impedance; driving /CS low selects the device for instruction transfer. Must track VCC at power-up (pull-up resistor recommended). |+| 2 | DO (IO1) | bidirectional | Serial Data Output for Standard SPI (unidirectional, data shifted out on falling edge of CLK). Becomes bidirectional IO1 during Dual SPI instructions (Fast Read Dual Output 3Bh, Fast Read Dual I/O BBh). |+| 3 | /WP | input | Active-low Write Protect input. Used in conjunction with Status Register SRP and Block Protect bits (TB, BP1, BP0) to hardware-protect a portion or the entire memory array from Status Register writes. |+| 4 | GND | power_in | Ground reference for the device. |+| 5 | DI (IO0) | bidirectional | Serial Data Input for Standard SPI (unidirectional, data shifted in on rising edge of CLK). Becomes bidirectional IO0 during Dual SPI instructions. |+| 6 | CLK | input | Serial Clock input. Provides the timing for serial input and output operations. Supports up to 104MHz clock frequency; Modes 0 (CPOL=0/CPHA=0) and 3 (CPOL=1/CPHA=1) are supported. |+| 7 | /HOLD | input | Active-low Hold input. When /HOLD is low while /CS is low, DO becomes high-impedance and DI/CLK are ignored, pausing the device without deselecting it. Useful when sharing SPI signals with other devices. |+| 8 | VCC | power_in | Power supply input, 2.3V to 3.6V operating range (2.5V/3V/3.3V nominal). Typical active current 1mA; power-down current <1uA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Winbond Elec |+| Package | SOIC-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `W25X20CLSNIGSNIG`+- `W25X20CLSNIGSVIG`+- `W25X20CLSNIGZPIG`+- `W25X20CLSNIGUXIG`++## CAD (KiCad official)++- Symbol: `W25X20CLSNIG`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Winbond Elec datasheet](docs/w25x20clsnig-datasheet.pdf) (50 pp, sha256 `4a9b7de0f7175cd5`, 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](docs/w25x20clsnig-datasheet.pdf)

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