W25X40CLSNIG
Public Unreviewedby Ray
Winbond Elec NOR FLASH, SOIC-8-150mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownW25X40CLSNIG
Winbond Elec · NOR FLASH · SOIC-8-150mil
W25X40CLSNIG from Winbond Elec, in a SOIC-8-150mil. 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 | SPI Chip Select input, active low. When /CS is high the device is deselected and DO / IO0 / IO1 are at high impedance; when driven low the device is selected and instructions can be issued. Must track VCC at power-up; a pull-up resistor to VCC is recommended. |
| 2 | DO (IO1) | bidirectional | Data output in Standard SPI mode (unidirectional, driven on falling edge of CLK). In Dual SPI mode this pin becomes bidirectional IO1 for the Fast Read Dual Output (3Bh) and Fast Read Dual I/O (BBh) instructions. |
| 3 | /WP | input | Write Protect input, active low. Used in conjunction with the Status Register SRP, TB and BP2/BP1/BP0 bits 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 | Data input in Standard SPI mode (unidirectional, latched on rising edge of CLK) used to send instructions, addresses and data. In Dual SPI mode this pin becomes bidirectional IO0. |
| 6 | CLK | input | SPI Serial Clock input; provides the timing reference for all serial input and output operations. Supports SPI Modes 0 and 3 up to 104MHz. |
| 7 | /HOLD | input | Hold input, active low. When /HOLD is asserted low while /CS is low the DO pin goes to high impedance and signals on DI and CLK are ignored, pausing the device without losing state; useful when the SPI bus is shared with other devices. |
| 8 | VCC | power_in | Power supply input. Single-supply operation from 2.3V to 3.6V; typical active current ~1mA and power-down current <1uA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Winbond Elec |
| Package | SOIC-8-150mil |
| Category | Memory |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
W25X40CLSNIGW25X40CLSNIGSNJGW25X40CLSNIGSSIGW25X40CLSNIGSSJGW25X40CLSNIGSVIGW25X40CLSNIGSVJGW25X40CLSNIGZPIGW25X40CLSNIGZPJGW25X40CLSNIGUXIGW25X40CLSNIGUXJGW25X40CLSNIGDAIGW25X40CLSNIGDAJG
CAD (KiCad official)
- Symbol:
W25X40CLSNIG - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8-150mil (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
w25x40clsnig.step |
122 KB | You want the bare part, or you mark your own boards. |
w25x40clsnig-etched.step |
2.3 MB | You want the part with W25X40CLSNIG already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 576 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: Winbond Elec datasheet (53 pp, sha256
815a536a29f475d0, 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).