# IRS2181STR

**UMW** · Gate Drivers · SOP-8

IRS2181STR from UMW, in a SOP-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 | HIN | input | Logic input for the high-side gate driver output HO, in phase; compatible with 3.3V, 5V and 15V input logic. |
| 2 | LIN | input | Logic input for the low-side gate driver output LO, in phase; compatible with 3.3V, 5V and 15V input logic. |
| 3 | COM | power_in | Low-side return (ground reference for the logic inputs and LO output); all voltage ratings are referenced to VSS. |
| 4 | LO | output | Low-side gate drive output; absolute maximum VLO is -0.3 V to VCC+0.3 V. |
| 5 | VCC | power_in | Low-side and logic fixed supply; recommended operating range is 10 V to 20 V. |
| 6 | VS | power_in | High-side floating supply return; recommended range is -9 V to 700 V, and absolute maximum is VB-25 V to 725 V. |
| 7 | HO | output | High-side gate drive output; absolute maximum VHO is VS-0.3 V to VB+0.3 V. |
| 8 | VB | power_in | High-side floating supply, referenced to VS; recommended range is VS+10 V to VS+20 V, and absolute maximum is 25 V above VS. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Motor Driver ICs |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `IRS2181STR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `irs2181str-etched.step` / `irs2181str-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `irs2181str.step` / `irs2181str.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757273645306142720) (11 pp, sha256 `c05329090b229b2b`, retrieved 2026-10-09, tier: lcsc)
- **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/irs2181str-datasheet.pdf)