# ISO35TDWR

**Texas Instruments** · Isolated RS-485/422 Transceivers · SOIC-16-300mil

ISO35TDWR from Texas Instruments, in a SOIC-16-300mil. 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 | D1 | tri_state | Transformer Driver Terminal 1, Open-Drain Output |
| 2 | D2 | tri_state | Transformer Driver Terminal 2, Open-Drain Output |
| 3 | GND1 | power_in | Logic-side Ground |
| 4 | VCC1 | power_in | Logic-side Power Supply |
| 5 | R | output | Receiver Output |
| 6 | RE | input | Receiver Enable Input. This pin has complementary logic. |
| 7 | DE | input | Driver Enable Input |
| 8 | D | input | Driver Input |
| 9 | GND2 | power_in | Bus-side Ground. Both pins are internally connected. |
| 10 | NC | unconnected | No Connect. This pin is not connected to any internal circuitry. |
| 11 | Y | output | Non-inverting Driver Output |
| 12 | Z | output | Inverting Driver Output |
| 13 | B | input | Inverting Receiver Input |
| 14 | A | input | Non-inverting Receiver Input |
| 15 | GND2 | power_in | Bus-side Ground. Both pins are internally connected. |
| 16 | VCC2 | power_in | Bus-side Power Supply |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Signal Isolation Devices |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `ISO35TDWR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `iso35tdwr-etched.step` / `iso35tdwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `iso35tdwr.step` / `iso35tdwr.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/iso35t) (31 pp, sha256 `9837a1581f03b099`, retrieved 2026-10-03, tier: lcsc)
- **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/iso35tdwr-datasheet.pdf)