# CAT24C64WI-GT3

**onsemi** · EEPROM · SOIC-8

CAT24C64WI-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 Slave address, allowing up to eight CAT24C64 devices to share the same I2C bus. Internally pulled LOW when left floating. |
| 2 | A1 | input | Device address input bit 1. Hard-wired HIGH or LOW to set the Slave address. Internally pulled LOW when left floating. |
| 3 | A2 | input | Device address input bit 2. Hard-wired HIGH or LOW to set the Slave address. Internally pulled LOW when left floating. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | I2C Serial Data I/O. Open-drain in transmit mode; requires an external pull-up resistor to VCC. Data is acquired on the rising edge and delivered on the falling edge of SCL. |
| 6 | SCL | input | I2C Serial Clock input generated by the Master. Schmitt-triggered with noise suppression filter. |
| 7 | WP | input | Write Protect input. When held HIGH, all write operations to memory are inhibited. Internally pulled LOW when left floating, allowing writes. |
| 8 | VCC | power_in | Supply voltage input. Operating range 1.7 V to 5.5 V (Fast-Plus 1 MHz requires VCC >= 2.5 V). |

## Key specifications

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

## Ordering variants

- `CAT24C64WI-GT3W`
- `CAT24C64WI-GT3X`
- `CAT24C64WI-GT3L`
- `CAT24C64WI-GT3Z`
- `CAT24C64WI-GT3Y`
- `CAT24C64WI-GT3US`
- `CAT24C64WI-GT3HU4`
- `CAT24C64WI-GT3VP2`
- `CAT24C64WI-GT3C4C`

## CAD (KiCad official)

- Symbol: `CAT24C64WI-GT3`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cat24c64wi-gt3-etched.step` / `cat24c64wi-gt3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cat24c64wi-gt3.step` / `cat24c64wi-gt3.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/cat24c64wi-gt3-d.pdf) (17 pp, sha256 `0e4b6b61af47c300`, 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](docs/cat24c64wi-gt3-datasheet.pdf)