component
SI8641BA-B-IU
Public Made by Adomby adom
Skyworks Solutions Digital Isolators, QSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSI8641BA-B-IU
Skyworks Solutions · Digital Isolators · QSOP-16
SI8641BA-B-IU from Skyworks Solutions, in a QSOP-16. 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, 2.375 V to 5.5 V recommended operating range, with a 0.1 µF bypass capacitor to GND1 placed close to the package. |
| 2 | GND1 | power_in | Side 1 ground, which must be externally connected to side 1 ground on narrow-body style packages. |
| 3 | A1 | input | Side 1 digital input, passed to output B1 across the isolation barrier. |
| 4 | A2 | input | Side 1 digital input, passed to output B2 across the isolation barrier. |
| 5 | A3 | input | Side 1 digital input, passed to output B3 across the isolation barrier. |
| 6 | A4 | output | Side 1 digital output carrying the side 2 B4 input, driven to high impedance when EN1 is low. |
| 7 | EN1 | input | Side 1 active-high enable for output A4, internally pulled up to VDD1 so it can be left floating or tied to a logic level. |
| 8 | GND1 | power_in | Side 1 ground, which must be externally connected to side 1 ground on narrow-body style packages. |
| 9 | GND2 | power_in | Side 2 ground, which must be externally connected to side 2 ground on narrow-body style packages. |
| 10 | EN2 | input | Side 2 active-high enable for outputs B1, B2 and B3, internally pulled up to VDD2 so it can be left floating or tied to a logic level. |
| 11 | B4 | input | Side 2 digital input, passed to output A4 across the isolation barrier. |
| 12 | B3 | output | Side 2 digital output following input A3, driven to high impedance when EN2 is low. |
| 13 | B2 | output | Side 2 digital output following input A2, driven to high impedance when EN2 is low. |
| 14 | B1 | output | Side 2 digital output following input A1, driven to high impedance when EN2 is low. |
| 15 | GND2 | power_in | Side 2 ground, which must be externally connected to side 2 ground on narrow-body style packages. |
| 16 | VDD2 | power_in | Side 2 power supply, 2.375 V to 5.5 V recommended operating range, with a 0.1 µF bypass capacitor to GND2 placed close to the package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Skyworks Solutions |
| Package | QSOP-16 |
| Category | Signal Isolation Devices |
| Pins | 16 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC | 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. | 35 |
CAD (KiCad official)
- Symbol:
SI8641BA-B-IU - Footprint:
Package_SO:QSOP-16_3.9x4.9mm_P0.635mm - 3D model: QSOP-16 (KiCad packages3D, STEP)
- 3D model files:
si8641ba-b-iu-etched.step/si8641ba-b-iu-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);si8641ba-b-iu.step/si8641ba-b-iu.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Skyworks Solutions datasheet (46 pp, sha256
032aeb8b1ade5e14, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).