# INA381A1IDSGR

**Texas Instruments** · Power Management - Specialized · WSON-8-EP(2x2)

INA381A1IDSGR from Texas Instruments, in a WSON-8-EP(2x2). 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 | IN+ | input | Connect this pin to the supply side of the shunt resistor |
| 2 | VS+ | power_in | Power supply: 2.7 V to 5.5 V |
| 3 | ALERT | tri_state | Overlimit alert, active low, open-drain output |
| 4 | RESET | input | Transparent or latch mode selection input |
| 5 | CMPREF | input | Input reference to the comparator |
| 6 | CMPIN | input | Signal input to the comparator |
| 7 | VOUT | output | Current-sense amplifier output voltage |
| 8 | IN- | input | Connect this pin to the load side of the shunt resistor |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-8-EP(2x2) |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `INA381A1IDSGR`
- Footprint: `Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm`
- 3D model: WSON-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `ina381a1idsgr-etched.step` / `ina381a1idsgr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina381a1idsgr.step` / `ina381a1idsgr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ina381) (44 pp, sha256 `6a38c5a2491e4eea`, retrieved 2026-10-01, 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 0.3`, primary `claude-haiku-4-5-20251001` (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/ina381a1idsgr-datasheet.pdf)