# TP3485ES8

**TECH PUBLIC** · RS-485 / RS-422 ICs · SOP-8

TP3485ES8 from TECH PUBLIC, 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 | RO | output | Receiver output: with /RE low, RO is high if A-B ≥ -10mV and low if A-B ≤ -200mV. |
| 2 | /RE | input | Receiver output enable: drive low to enable RO, high makes RO high impedance; /RE high with DE low enters low-power shutdown. |
| 3 | DE | input | Driver output enable: drive high to enable driver outputs, low makes them high impedance; DE low with /RE high enters low-power shutdown. |
| 4 | DI | input | Driver input: with DE high, a low on DI forces non-inverting output low and inverting output high, and a high on DI does the opposite. |
| 5 | GND | power_in | Ground. |
| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output. |
| 7 | B | bidirectional | Inverting receiver input and inverting driver output. |
| 8 | VCC | power_in | Positive supply, operating range 3.0 to 5.5V (absolute maximum 7V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TP3485ES8`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tp3485es8-etched.step` / `tp3485es8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp3485es8.step` / `tp3485es8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908598648053760) (9 pp, sha256 `3e1deea5127da931`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/tp3485es8-datasheet.pdf)