CAT24C32WI-GT3 from onsemi, 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. Hard-wired HIGH or LOW to set the I2C slave address, allowing up to eight CAT24C32 devices on a single bus. Internally pulled LOW (weak pull-down, ~50 uA max input current) when left floating.
2	A1	input	Device address input bit 1. Hard-wired HIGH or LOW to set the I2C slave address. Internally pulled LOW (weak pull-down) when left floating.
3	A2	input	Device address input bit 2. Hard-wired HIGH or LOW to set the I2C slave address. Internally pulled LOW (weak pull-down) when left floating.
4	VSS	power_in	Ground reference for the device.
5	SDA	bidirectional	I2C Serial Data I/O (open-drain). Data is acquired on the positive edge of SCL and delivered on the negative edge. Requires an external pull-up resistor to VCC. Input capacitance ~8 pF max.
6	SCL	input	I2C Serial Clock input. Accepts the clock generated by the bus master at up to 100 kHz (Standard), 400 kHz (Fast), or 1 MHz (Fast-Plus). Requires an external pull-up resistor to VCC.
7	WP	input	Write Protect input. When pulled HIGH, inhibits all write operations to the entire memory array. Internally pulled LOW (weak pull-down, ~130 uA max input current at VCC = 5.5 V) when left floating, so writes are allowed by default.
8	VCC	power_in	Supply voltage input, 1.7 V to 5.5 V. Powers the EEPROM core and I/O; Fast-Plus (1 MHz) operation requires VCC >= 2.5 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

CAT24C32WI-GT3W
CAT24C32WI-GT3
CAT24C32WI-GT3L
CAT24C32WI-GT3Y
CAT24C32WI-GT3HU4
CAT24C32WI-GT3US
CAT24C32WI-GT3C5A
CAT24C32WI-GT3C4C

CAD (KiCad official)

Symbol: CAT24C32WI-GT3
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
`cat24c32wi-gt3.step`	122 KB	You want the bare part, or you mark your own boards.
`cat24c32wi-gt3-etched.step`	2.6 MB	You want the part with `CAT24C32WI-GT3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 631 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: onsemi datasheet (16 pp, sha256 58aeb31e57e946d3, 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