AT24C512C-SSHD-T from Microchip, 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	A0	input	Device address input bit 0. Hardwired to VCC or GND to set the least-significant bit of the I2C slave address, allowing up to eight AT24C512C devices to share one 2-wire bus. Internally pulled down to GND if left floating, but Atmel recommends tying to a known state (10kΩ or less).
2	A1	input	Device address input bit 1. Hardwired to VCC or GND to help select one of up to eight devices on a shared 2-wire bus. Internally pulled down to GND if left floating; Atmel recommends a hard tie or pull-resistor (10kΩ or less).
3	A2	input	Device address input bit 2 (MSB of the hardware address). Hardwired to VCC or GND for multi-device addressing on a shared 2-wire bus. Internally pulled down to GND if left floating; Atmel recommends a hard tie or pull-resistor (10kΩ or less).
4	GND	power_in	Ground / VSS reference for the device.
5	SDA	bidirectional	Serial data line for the 2-wire (I2C-compatible) interface. Bidirectional, open-drain (requires an external pull-up to VCC, typically 1.3kΩ at 2.5-5V or 10kΩ at 1.7V per AC spec). May be wire-ORed with any number of other open-drain/open-collector devices. Input capacitance 8pF max.
6	SCL	input	Serial clock input for the 2-wire (I2C-compatible) interface. Positive edges clock data into the device, negative edges clock data out. Supports up to 400kHz at 1.7V VCC and up to 1MHz at 2.5-5.5V VCC. Requires external pull-up to VCC.
7	WP	input	Write Protect input. When tied to GND, normal write operations are permitted; when tied directly to VCC, all writes to the memory array are inhibited (full-array protection). Internally pulled down to GND if left floating; Atmel recommends a hard tie or 10kΩ or smaller pull resistor.
8	VCC	power_in	Positive supply voltage. Operating range 1.7V to 3.6V (VCC1 variant) or 2.5V to 5.5V (VCC2 variant). Typical supply currents: 2.0mA (read at 400kHz, 5V) and 3.0mA (write at 400kHz, 5V); standby currents 1-6µA depending on VCC.

Key specifications

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

Ordering variants

AT24C512C-SSHD-T

CAD (KiCad official)

Symbol: AT24C512C-SSHD-T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`at24c512c-sshd-t.step`	122 KB	You want the bare part, or you mark your own boards.
`at24c512c-sshd-t-etched.step`	2.7 MB	You want the part with `AT24C512C-SSHD-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 666 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: Microchip datasheet (21 pp, sha256 9a744ba063c1f9ee, 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