AT24C512CM from HGSEMI, 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	E0	input	Device address input bit 0. Hard-wired to VCC or GND to set the software-selectable slave address bit A0, allowing up to 8 devices on one I2C bus. Internally pulled down to GND if left floating.
2	E1	input	Device address input bit 1. Hard-wired to VCC or GND to set slave-address bit A1. Internally pulled down to GND if left floating.
3	E2	input	Device address input bit 2. Hard-wired to VCC or GND to set slave-address bit A2. Internally pulled down to GND if left floating.
4	GND	power_in	Ground reference for the power supply. Must be tied to the system ground.
5	SDA	bidirectional	Serial data. Open-drain bidirectional I2C data line used to transfer address and data serially to and from the device. Requires an external pull-up resistor to VCC.
6	SCL	input	Serial clock. I2C clock input; command and input data on SDA are latched on the rising edge, output data on SDA is clocked out on the falling edge. Includes Schmitt trigger and spike-suppression filter.
7	WP	input	Write Protect. Tie to VCC to make the entire memory array read-only (device address byte and word address bytes still acknowledged, data bytes NACKed). Tie to GND or leave floating to enable write operations.
8	VCC	power_in	Device power supply, 1.7V to 5.5V. Operations at invalid VCC voltages may produce spurious results.

Key specifications

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

Ordering variants

AT24C512CM/TR
AT24C512CMCN
AT24C512CMM/TR
AT24C512CMT/TR
AT24C512CMCDQ/TR
AT24C512CMCDQ3/TR

CAD (KiCad official)

Symbol: AT24C512CM
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
`at24c512cm.step`	122 KB	You want the bare part, or you mark your own boards.
`at24c512cm-etched.step`	1.9 MB	You want the part with `AT24C512CM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 477 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: HGSEMI datasheet (26 pp, sha256 9b5af03846a21237, 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