# CAT25040VI-GT3

**onsemi** · Pre-ordered Products · SOIC-8

CAT25040VI-GT3 from onsemi, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CS | input | Chip select input; when CS is high, SO is tri-stated and the device is in Standby Mode unless an internal write is in progress. |
| 2 | SO | tri_state | Serial data output shifted out on the falling edge of SCK and held high impedance when CS is high. |
| 3 | WP | input | Write protect input; when tied low, all write operations to the memory array and status register are inhibited. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SI | input | Serial data input that accepts op-codes, addresses and data, latched on the rising edge of SCK. |
| 6 | SCK | input | Serial clock input provided by the host for synchronizing communication with the device. |
| 7 | HOLD | input | Pauses serial transmission when taken low while SCK is low; tie to VCC when not used. |
| 8 | VCC | power_in | Power supply, 1.8 V to 5.5 V supply voltage range. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-8 |
| Category | Solders / Accessories / Batteries |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `CAT25040VI-GT3`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cat25040vi-gt3-etched.step` / `cat25040vi-gt3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cat25040vi-gt3.step` / `cat25040vi-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/cat25040vi-gt3-d.pdf) (14 pp, sha256 `558ac9ecb0df6a39`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cat25040vi-gt3-datasheet.pdf)