# THVD1451DRBT

**Texas Instruments** · RS-485 / RS-422 ICs · SON-8-EP(3x3)

THVD1451DRBT from Texas Instruments, in a SON-8-EP(3x3). 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 | 3.3-V to 5-V power supply |
| 2 | R | output | Receive data output |
| 3 | D | input | Driver data input |
| 4 | GND | power_in | Device ground |
| 5 | Y | output | Digital bus output, Y (complementary to Z) |
| 6 | Z | output | Digital bus output, Z (complementary to Y) |
| 7 | B | input | Bus input, B (complementary to A) |
| 8 | A | input | Bus input, A (complementary to B) |
| 9 | Thermal Pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SON-8-EP(3x3) |
| Category | Interface |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `THVD1451DRBT`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `thvd1451drbt-etched.step` / `thvd1451drbt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `thvd1451drbt.step` / `thvd1451drbt.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/thvd1452) (53 pp, sha256 `c4b3b0da87c870dd`, retrieved 2026-10-03, 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/thvd1451drbt-datasheet.pdf)