M24256-BWMN6TP from STMicroelectronics, 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	E0	input	Chip Enable address input bit b1 of the 7-bit I2C device select code. Must be tied to VCC or VSS (floating reads as 0). Sets one of eight device addresses on a shared bus.
2	E1	input	Chip Enable address input bit b2 of the 7-bit I2C device select code. Must be tied to VCC or VSS (floating reads as 0).
3	E2	input	Chip Enable address input bit b3 of the 7-bit I2C device select code. Must be tied to VCC or VSS (floating reads as 0).
4	VSS	power_in	Ground reference for VCC supply voltage.
5	SDA	bidirectional	I2C Serial Data input/output. Open-drain output, requires an external pull-up resistor to VCC. Transfers data in and out of the EEPROM synchronized with SCL.
6	SCL	input	I2C Serial Clock input. Strobes data available on SDA(in) and clocks out data on SDA(out). Supports up to 1 MHz on the -BW variant.
7	WC	input	Write Control (active low). When driven high, write operations to the entire memory array are inhibited (device select and address bytes are still acknowledged, data bytes are not). Driven low or left floating enables writes.
8	VCC	power_in	Supply voltage. On the -BW variant: 2.5 V to 5.5 V. Decouple with a 10 nF to 100 nF capacitor to VSS close to the package pins.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-8-150mil
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

M24256-BWMN6TP
M24256-BWMN6TPDW6TP
M24256-BWMN6TPDW6
M24256-BWMN6TPMC6TP
M24256-BWMN6TPMC6
M24256-BWMN6TPCS6

CAD (KiCad official)

Symbol: M24256-BWMN6TP
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
`m24256-bwmn6tp.step`	122 KB	You want the bare part, or you mark your own boards.
`m24256-bwmn6tp-etched.step`	2.6 MB	You want the part with `M24256-BWMN6TP` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 639 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 (43 pp, sha256 3667ff5a4600a5b5, 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