component
LY143DA05UL
Public Made by Adomby adom
Liown ESD And Surge Protection (TVS/ESD), SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LY143DA05UL
Liown · ESD And Surge Protection (TVS/ESD) · SOT-143
LY143DA05UL from Liown, in a SOT-143. 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 | GND | power_in | Bottom rail of the steering-diode array, tied to the anode side of the internal TVS zener, so it is the ground/return reference for the protected lines. |
| 2 | I/O2 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 3 | I/O1 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 4 | VCC | power_in | Top rail of the steering-diode array, tied to the cathode side of the internal TVS zener, with a reverse working voltage of 5V max. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
LY143DA05UL - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files:
ly143da05ul-etched.step/ly143da05ul-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ly143da05ul.step/ly143da05ul.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Liown datasheet (5 pp, sha256
9bdd1d9d0c876660, retrieved 2026-10-09, tier: lcsc) - 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).
# LY143DA05UL
**Liown** · ESD And Surge Protection (TVS/ESD) · SOT-143
LY143DA05UL from Liown, in a SOT-143. 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 | GND | power_in | Bottom rail of the steering-diode array, tied to the anode side of the internal TVS zener, so it is the ground/return reference for the protected lines. |
| 2 | I/O2 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 3 | I/O1 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 4 | VCC | power_in | Top rail of the steering-diode array, tied to the cathode side of the internal TVS zener, with a reverse working voltage of 5V max. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |
## CAD (KiCad official)
- Symbol: `LY143DA05UL`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files: `ly143da05ul-etched.step` / `ly143da05ul-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ly143da05ul.step` / `ly143da05ul.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Liown datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908816735490048) (5 pp, sha256 `9bdd1d9d0c876660`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).
[Datasheet PDF](docs/ly143da05ul-datasheet.pdf)