# TF2108A-3AS

**TFSS** · Gate Drivers · PDIP-8

TF2108A-3AS from TFSS, in a PDIP-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 | VCC | power_in | Low-side and logic fixed supply, 10V to 20V recommended (absolute maximum 24V). |
| 2 | HIN | input | Logic input for the high-side gate driver output, in phase with HO; Schmitt-triggered with internal pull-down, 3.3V capable. |
| 3 | LIN* | input | Logic input for the low-side gate driver output, out of phase with LO; Schmitt-triggered with internal pull-down, 3.3V capable. |
| 4 | COM | power_in | Low-side return (ground reference for the LO output). |
| 5 | LO | output | Low-side gate drive output, swings from 0V to VCC. |
| 6 | VS | power_in | High-side floating supply return, operates up to 600V offset. |
| 7 | HO | output | High-side gate drive output, swings from VS to VB. |
| 8 | VB | power_in | High-side floating supply, VS+10V to VS+20V (absolute maximum 624V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TFSS |
| Package | PDIP-8 |
| Category | Motor Driver ICs |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TF2108A-3AS`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `tf2108a-3as-etched.step` / `tf2108a-3as-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tf2108a-3as.step` / `tf2108a-3as.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TFSS datasheet](docs/tf2108a-3as-datasheet.pdf) (19 pp, sha256 `7cb5892249d52b19`, retrieved 2026-10-23, 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/tf2108a-3as-datasheet.pdf)