M24128-BWMN6TP from STMicroelectronics, 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	E0	input	Chip Enable address input bit 0. Sets bit b1 of the 7-bit I2C device select code. Must be tied to VCC or VSS; a floating input is read as 0.
2	E1	input	Chip Enable address input bit 1. Sets bit b2 of the 7-bit I2C device select code. Must be tied to VCC or VSS; a floating input is read as 0.
3	E2	input	Chip Enable address input bit 2. Sets bit b3 of the 7-bit I2C device select code. Must be tied to VCC or VSS; a floating input is read as 0.
4	VSS	power_in	Ground reference for the VCC supply voltage.
5	SDA	bidirectional	I2C Serial Data. Open-drain bidirectional pin used to transfer data in and out of the device; requires an external pull-up resistor to VCC.
6	SCL	input	I2C Serial Clock input. Strobes data on SDA(in) into the device and clocks data out on SDA(out). Supports 100 kHz, 400 kHz and 1 MHz operation.
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). When driven low or left floating, writes are enabled.
8	VCC	power_in	Supply voltage input. M24128-BW operating range: 2.5 V to 5.5 V. Decouple with a 10 nF to 100 nF capacitor close to the VCC/VSS pins.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

M24128-BWMN6TP
M24128-BWMN6TPDW
M24128-BWMN6TPBN
M24128-BWMN6TPMC
M24128-BWMN6TPCS
M24128-BWMN6TPDFCS6TP
M24128-BWMN6TPDFCS6TK

CAD (KiCad official)

Symbol: M24128-BWMN6TP
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: STMicroelectronics datasheet (39 pp, sha256 0e2a0fea8bcb195e, 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