# SI8423BB-D-ISR

**Skyworks Solutions** · Digital Isolators · SOIC-8

SI8423BB-D-ISR from Skyworks Solutions, 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 | VDD1 | power_in | Side 1 power supply; the datasheet requires a 0.1 μF bypass capacitor between VDD1 and GND1 placed as close to the package as possible. |
| 2 | A1 | input | Side 1 digital input or output; for the Si8423 this channel is an input per the ordering guide. |
| 3 | A2 | input | Side 1 digital input or output; for the Si8423 this channel is an input per the ordering guide. |
| 4 | GND1 | power_in | Side 1 ground. |
| 5 | GND2 | power_in | Side 2 ground. |
| 6 | B2 | output | Side 2 digital input or output; for the Si8423 this channel is an output per the ordering guide. |
| 7 | B1 | output | Side 2 digital input or output; for the Si8423 this channel is an output per the ordering guide. |
| 8 | VDD2 | power_in | Side 2 power supply; the datasheet requires a 0.1 μF bypass capacitor between VDD2 and GND2 placed as close to the package as possible. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Skyworks Solutions |
| Package | SOIC-8 |
| Category | Signal Isolation Devices |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SI8423BB-D-ISR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `si8423bb-d-isr-etched.step` / `si8423bb-d-isr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si8423bb-d-isr.step` / `si8423bb-d-isr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Skyworks Solutions datasheet](docs/si8423bb-d-isr-datasheet.pdf) (38 pp, sha256 `3ad94435a9a28841`, retrieved 2026-10-28, 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/si8423bb-d-isr-datasheet.pdf)