24LC512T-I 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	User-configurable chip-address input bit 0. Compared with the corresponding bit in the I2C slave address (control byte); the device responds when all three A[2:0] bits match. Must be tied to VSS or VCC - do not leave floating. Allows up to 8 devices to share a bus (4 Mbit address space).
2	A1	input	User-configurable chip-address input bit 1. Compared with the corresponding bit in the I2C slave address; must be tied high (VCC) or low (VSS). Combined with A0/A2 selects one of up to 8 devices on the bus.
3	A2	input	User-configurable chip-address input bit 2. Compared with the corresponding bit in the I2C slave address; must be tied to VCC or VSS. Together with A0/A1 forms the 3-bit device select field.
4	VSS	power_in	Ground reference for all logic and the EEPROM array. Connect to system 0 V.
5	SDA	bidirectional	Bidirectional I2C serial data line. Open-drain output - requires an external pull-up resistor to VCC (typical 10 kΩ for 100 kHz, 2 kΩ for 400 kHz / 1 MHz). Data on SDA may change only while SCL is low; transitions while SCL is high signal Start/Stop conditions.
6	SCL	input	I2C serial clock input. Synchronizes all data transfers to/from the device; supplied by the bus master. Schmitt-trigger input with noise-spike suppression; up to 400 kHz on 24LC512.
7	WP	input	Write-Protect input. Tie to VSS to enable write operations; tie to VCC to inhibit writes to the entire array (reads unaffected). Must not be left floating.
8	VCC	power_in	Positive supply. 24LC512 operating range +2.5 V to +5.5 V. Typical active current 400 µA (read @ 400 kHz), write current 5 mA, standby current 100 nA typ / 1 µA max at 5.5 V. Decouple with 0.1 µF close to the pin.

Key specifications

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

Ordering variants

24LC512T-IP
24LC512T-ISN
24LC512T-ISM
24LC512T-IST
24LC512T-ISL
24LC512T-IMF
24LC512T-IMNY
24LC512T-ICS

CAD (KiCad official)

Symbol: 24LC512T-I
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
`24lc512t-i.step`	122 KB	You want the bare part, or you mark your own boards.
`24lc512t-i-etched.step`	1.7 MB	You want the part with `24LC512T-I` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 436 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 (36 pp, sha256 0d28e107e3c4e44e, 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