M95256-WMN6TP from STMicroelectronics, in a SO-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	S#	input	Chip Select (active low). Driving S# low selects the device and enters Active Power mode; driving high deselects and puts Q into high-Z (Standby Power). A falling edge on S# is required after power-up before any instruction.
2	Q	output	Serial Data Output (MISO). Shifts data out on the falling edge of Serial Clock (C). High-impedance when S# is high or when HOLD# is low.
3	W#	input	Write Protect (active low). When low together with SRWD bit set, freezes the Status Register and the memory area protected by BP1/BP0. Must be driven high or low and stable during any Write instruction.
4	VSS	power_in	Ground. Reference for all signals including VCC.
5	D	input	Serial Data Input (MOSI). Receives instructions, addresses, and data to be written. Latched on the rising edge of Serial Clock (C).
6	C	input	Serial Clock. Provides the timing of the serial interface (up to 20 MHz). Input data on D is latched on the rising edge; output data on Q changes on the falling edge.
7	HOLD#	input	Hold (active low). Pauses serial communication without deselecting the device. When held low, Q goes high-impedance and D/C are don't-care. Device must first be selected (S# low) to enter the Hold condition.
8	VCC	power_in	Supply voltage. 2.5 V to 5.5 V for M95256-W (this variant). Must remain stable within the specified range during all operations.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SO-8
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

M95256-WMN6TP
M95256-WMN6TPDW
M95256-WMN6TPMC
M95256-WMN6TPCS

CAD (KiCad official)

Symbol: M95256-WMN6TP
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`m95256-wmn6tp.step`	122 KB	You want the bare part, or you mark your own boards.
`m95256-wmn6tp-etched.step`	2.5 MB	You want the part with `M95256-WMN6TP` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 608 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: STMicroelectronics datasheet (57 pp, sha256 698166e3207620a0, retrieved 2026-08-17, tier: manufacturer)
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