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π131U31S
Public Made by Adomby adom
2Pai Semi Digital Isolators, SSOP-16. Datasheet-verified pinout, 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
markdownπ131U31S
2Pai Semi · Digital Isolators · SSOP-16
π131U31S from 2Pai Semi, in a SSOP-16. 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 | VDD1 | power_in | Primary side power supply input, 3.0V to 5.5V recommended operating voltage range. |
| 2 | GND1 | power_in | Primary side power supply reference ground. |
| 3 | VIA | input | Input channel A, logic low 0 to 0.3×VDDx, logic high 0.7×VDDx to VDDx. |
| 4 | VIB | input | Input channel B, logic low 0 to 0.3×VDDx, logic high 0.7×VDDx to VDDx. |
| 5 | VOC | output | Output channel C with default state high, VOH VDDx−0.2V to VDDx, VOL 0 to 0.2V at 2 mA load. |
| 6 | NC | unconnected | No connection. |
| 7 | NC | unconnected | No connection; EN1 enable function not present in π131U3x variants. |
| 8 | GND1 | power_in | Primary side power supply reference ground. |
| 9 | GND2 | power_in | Secondary side power supply reference ground. |
| 10 | NC | unconnected | No connection; EN2 enable function not present in π131U3x variants. |
| 11 | NC | unconnected | No connection. |
| 12 | VIC | input | Input channel C, logic low 0 to 0.3×VDDx, logic high 0.7×VDDx to VDDx. |
| 13 | VOB | output | Output channel B, VOH VDDx−0.2V to VDDx, VOL 0 to 0.2V at 2 mA load. |
| 14 | VOA | output | Output channel A, VOH VDDx−0.2V to VDDx, VOL 0 to 0.2V at 2 mA load. |
| 15 | GND2 | power_in | Secondary side power supply reference ground. |
| 16 | VDD2 | power_in | Secondary side power supply input, 3.0V to 5.5V recommended operating voltage range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | 2Pai Semi |
| Package | SSOP-16 |
| Category | Signal Isolation Devices |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
π131U31S - Footprint:
Package_SO:SSOP-16_5.3x6.2mm_P0.65mm - 3D model: SSOP-16 (KiCad packages3D, STEP)
- 3D model files:
131u31s-etched.step/131u31s-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);131u31s.step/131u31s.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: 2Pai Semi datasheet (18 pp, sha256
8626c86936b02ddb, retrieved 2026-09-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).