P25Q40SH-SSH-IT from PUYA, in a SOP-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	Chip Select, active low. Selects the device for SPI transactions; drive high to deselect and put the SO/SIO pins in high impedance.
2	SO/SIO1	bidirectional	Serial Data Output (SO) for standard 1-bit SPI mode. Acts as bidirectional SIO1 in Dual/Quad I/O and QPI read modes.
3	WP#/SIO2	bidirectional	Write Protect input, active low, gates status-register writes when QE=0. Serves as bidirectional SIO2 during Quad I/O and QPI read modes.
4	GND	power_in	Ground reference of the device (0 V). Connect to the system ground plane.
5	SI/SIO0	bidirectional	Serial Data Input (SI) for standard 1-bit SPI mode. Acts as bidirectional SIO0 in Dual/Quad I/O and QPI read modes.
6	SCLK	input	Serial interface clock input. Standard-read supports up to 55 MHz; Fast/Dual/Quad reads support up to 104 MHz.
7	HOLD#/RESET#/SIO3	bidirectional	Hardware Reset input (active low) or HOLD to pause the device without deselecting it; function selected by the Configure Register HOLD/RST bit. Serves as bidirectional SIO3 during Quad I/O and QPI read modes.
8	VCC	power_in	Power supply of the device, 2.3 V to 3.6 V. Decouple locally with a 0.1 uF ceramic capacitor to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	PUYA
Package	SOP-8
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

P25Q40SH-SSH-IT

CAD (KiCad official)

Symbol: P25Q40SH-SSH-IT
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`p25q40sh-ssh-it.step`	122 KB	You want the bare part, or you mark your own boards.
`p25q40sh-ssh-it-etched.step`	2.8 MB	You want the part with `P25Q40SH-SSH-IT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 691 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: PUYA datasheet (11 pp, sha256 7d08657969a085fe, 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