# CA-IS3082CWX

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

CA-IS3082CWX from Chipanalog, in a SOIC-16-300mil. 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 | VDDA | power_in | Logic side power supply input; connect 0.1μF and 1μF bypass capacitors between VDDA and GNDA pins as close as possible to device pins. |
| 2 | GNDA | power_in | Logic side ground, providing ground reference for digital signals. |
| 3 | RO | output | Receiver data output; when RE is low (receiver enabled), outputs high if (VA - VB) ≥ -50mV or low if (VA - VB) ≤ -200mV; outputs high impedance when RE is high. |
| 4 | RE | input | Receiver enable control input with internal weak pull-up; low level enables receiver, high level disables receiver output. |
| 5 | DE | input | Driver enable control input with internal weak pull-down, high level active; low level inhibits data transmission and sets driver output to high impedance. |
| 6 | DI | input | Driver data input with internal weak pull-up; when DE is high, high level on DI produces high on A and low on B; low level produces opposite result. |
| 7 | GNDA | power_in | Logic side ground, providing ground reference for digital signals. |
| 8 | GNDA | power_in | Logic side ground, providing ground reference for digital signals. |
| 9 | GNDB | power_in | Bus side ground, providing ground reference for RS-485 bus signals. |
| 10 | GNDB | power_in | Bus side ground, providing ground reference for RS-485 bus signals. |
| 11 | NC | unconnected | No internal connection; can be connected to VDDB, GNDB, or left floating. |
| 12 | A | bidirectional | RS-485 bus in-phase output from driver / in-phase input to receiver; differential pair with pin 13; operates as driver output when DE=high, receiver input when RE=low. |
| 13 | B | bidirectional | RS-485 bus anti-phase output from driver / anti-phase input to receiver; differential pair with pin 12; operates as driver output when DE=high, receiver input when RE=low. |
| 14 | NC | unconnected | No internal connection; can be connected to VDDB, GNDB, or left floating. |
| 15 | GNDB | power_in | Bus side ground, providing ground reference for RS-485 bus signals. |
| 16 | VDDB | power_in | Bus side power supply input; connect 0.1μF and 1μF bypass capacitors between VDDB and GNDB pins as close as possible to device pins. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CA-IS3082CWX`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `ca-is3082cwx-etched.step` / `ca-is3082cwx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ca-is3082cwx.step` / `ca-is3082cwx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Chipanalog datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604439403339132928) (22 pp, sha256 `9eab96b1cb24d97f`, retrieved 2026-09-21, 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/ca-is3082cwx-datasheet.pdf)