# MX3085E

**Wuxi Maxinmicro** · RS-485 / RS-422 ICs · SOP-8

MX3085E from Wuxi Maxinmicro, 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: while RE is low, RO is high when A-B is greater than or equal to -50 mV and low when A-B is less than or equal to -200 mV. |
| 2 | RE | input | Receiver output enable, active low: RO is enabled when RE is low and high-impedance when RE is high; with RE high and DE low the device enters low-power shutdown. |
| 3 | DE | input | Driver output enable: the driver outputs are active when DE is high and high-impedance when DE is low; with RE high and DE low the device enters low-power shutdown. |
| 4 | DI | input | Driver input: when DE is high, a low on DI forces the non-inverting output low and the inverting output high, and a high on DI forces the non-inverting output high and the inverting output low. |
| 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 | VDD | power_in | Positive supply pin; the datasheet specifies 3.0 V ≤ VCC ≤ 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Wuxi Maxinmicro |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `MX3085E`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `mx3085e-etched.step` / `mx3085e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mx3085e.step` / `mx3085e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Wuxi Maxinmicro datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590916469830205440) (9 pp, sha256 `b5042a2eb73568eb`, retrieved 2026-10-09, 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-5-5` (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/mx3085e-datasheet.pdf)