AT24C64D-SSHM-T from Microchip Tech, 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 LSB of the 3-bit device-select field in the I²C slave address, allowing up to eight AT24C64D devices on a single 2-wire bus. Internal pull-down to GND when left floating; Atmel recommends tying to a known state with ≤10 kΩ pull-up if used with VCC.
2	A1	input	Device address input bit 1. Hardwired to VCC or GND to set bit 1 of the 3-bit device-select field. Internal pull-down to GND when floating; recommended to tie to a known logic level.
3	A2	input	Device address input bit 2 (MSB of the 3-bit device-select field). Hardwired to VCC or GND to give the device a unique 2-wire slave address. Internal pull-down to GND when floating.
4	GND	power_in	Device ground reference (0 V).
5	SDA	bidirectional	I²C serial data. Bidirectional open-drain line; requires an external pull-up to VCC. Wire-ORable with any number of other open-drain / open-collector devices on the same 2-wire bus. Input capacitance 8 pF max.
6	SCL	input	I²C serial clock input. Positive-edge clocks data into the EEPROM and negative-edge clocks data out. Schmitt-triggered, filtered input; 400 kHz at 1.7 V, up to 1 MHz at 2.5-5.0 V. Input capacitance 6 pF max.
7	WP	input	Write-Protect input. Tie to GND for normal read/write operation; tie to VCC to inhibit all write operations (full array protected). Internal pull-down to GND when floating; Atmel recommends always tying to a known state (≤10 kΩ if using a pull-up).
8	VCC	power_in	Device power supply, 1.7 V to 5.5 V. Typical supply currents: 0.4 mA read / 2.0 mA write at 5.0 V; standby current 1 µA (1.7 V) / 6 µA (5.0 V). Absolute max 6.25 V.

Key specifications

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

Ordering variants

AT24C64D-SSHM-T

CAD (KiCad official)

Symbol: AT24C64D-SSHM-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
`at24c64d-sshm-t.step`	122 KB	You want the bare part, or you mark your own boards.
`at24c64d-sshm-t-etched.step`	2.5 MB	You want the part with `AT24C64D-SSHM-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 625 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 Tech datasheet (24 pp, sha256 f53715f452b00601, 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