# TD322D485H-A

**YLPTEC** · RS485 Bus Modules · DIP-12

TD322D485H-A from YLPTEC, in a DIP-12. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Supply voltage positive, 3.15-3.45 VDC for TD322D485H-A model |
| 2 | GND | power_in | Supply voltage ground reference |
| 3 | TXD1 | input | Transmit data input for channel 1, accepts 3.3V UART logic levels |
| 4 | RXD1 | output | Receive data output for channel 1, drives 3.3V UART logic levels |
| 5 | TXD2 | input | Transmit data input for channel 2, accepts 3.3V UART logic levels |
| 6 | RXD2 | output | Receive data output for channel 2, drives 3.3V UART logic levels |
| 7 | A2 | bidirectional | RS-485 differential A signal for channel 2, common mode range -7V to +12V, input impedance 48 ohms |
| 8 | B2 | bidirectional | RS-485 differential B signal for channel 2, common mode range -7V to +12V, input impedance 48 ohms |
| 9 | G2 | power_in | Isolated power domain reference ground for channel 2, may be left floating if not used |
| 10 | A1 | bidirectional | RS-485 differential A signal for channel 1, common mode range -7V to +12V, input impedance 48 ohms |
| 11 | B1 | bidirectional | RS-485 differential B signal for channel 1, common mode range -7V to +12V, input impedance 48 ohms |
| 12 | G1 | power_in | Isolated power domain reference ground for channel 1, may be left floating if not used |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YLPTEC |
| Package | DIP-12 |
| Category | IoT/Communication Modules |
| Pins | 12 |

## CAD (KiCad official)

- Symbol: `TD322D485H-A`
- Footprint: `Package_DIP:DIP-12_W7.62mm`
- 3D model: DIP-12 (KiCad packages3D, STEP)
- 3D model files: `td322d485h-a-etched.step` / `td322d485h-a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `td322d485h-a.step` / `td322d485h-a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YLPTEC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603169889712820224) (5 pp, sha256 `e28d45acbfdca7ad`, retrieved 2026-09-18, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/td322d485h-a-datasheet.pdf)