CAT24C08WI-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	NC	unconnected	No Connect. On the CAT24C08 variant the A0 device-address pin is not used internally (a10, a9, a8 of the memory map are supplied by upper address bits inside the device), so pin 1 is a No Connect. Leave floating or tie to VSS.
2	NC	unconnected	No Connect on the CAT24C08 variant. The A1 device-address function is not implemented because the 8-Kb array consumes the internal address extension bits. Leave floating or tie to VSS.
3	NC	unconnected	No Connect on the CAT24C08 variant. The A2 device-address function is not implemented on the 8-Kb device. Leave floating or tie to VSS.
4	VSS	power_in	Ground reference (0 V). Common return for the supply and all logic signals.
5	SDA	bidirectional	I2C Serial Data input/output. Open-drain pin that receives input data and transmits data stored in the EEPROM. Data is latched on the positive edge of SCL and driven on the negative edge. Requires an external pull-up to VCC. Input capacitance typ. 8 pF max.
6	SCL	input	I2C Serial Clock input. Accepts the serial clock generated by the bus master. Supports 100 kHz Standard-mode and 400 kHz Fast-mode. Requires an external pull-up to VCC. VIH >= 0.7 x VCC (max 5.5 V).
7	WP	input	Write Protect input. When held HIGH, all write operations to the entire memory array are inhibited (read operations are unaffected). Internally pulled LOW when not driven, so writes are enabled by default. VIH >= 0.7 x VCC.
8	VCC	power_in	Power supply, 1.7 V to 5.5 V. Read current typ. 1 mA, write current typ. 2 mA, standby current 1-5 uA. Bypass locally to VSS with a 0.1 uF ceramic capacitor.

Key specifications

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

Ordering variants

CAT24C08WI-GT3
CAT24C08WI-GT3LI
CAT24C08WI-GT3YI
CAT24C08WI-GT3ZI
CAT24C08WI-GT3USI
CAT24C08WI-GT3VP2I
CAT24C08WI-GT3HU4I
CAT24C08WI-GT3TDI
CAT24C08WI-GT3C4A
CAT24C08WI-GT3C4U
CAT24C08WI-GT3C5A

CAD (KiCad official)

Symbol: CAT24C08WI-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
`cat24c08wi-gt3.step`	122 KB	You want the bare part, or you mark your own boards.
`cat24c08wi-gt3-etched.step`	2.6 MB	You want the part with `CAT24C08WI-GT3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 649 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 (23 pp, sha256 1068a4f09584c5b3, 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