component
ms3485
Public Unreviewedby Ray
Hangzhou Ruimeng Tech RS-485 / RS-422 ICs, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
README
markdownMS3485
Hangzhou Ruimeng Tech · RS-485 / RS-422 ICs · SOIC-8
MS3485 from Hangzhou Ruimeng Tech, in a SOIC-8. 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 | RO | output | Receiver output. Outputs the recovered digital data from the differential A/B bus. Enters high-impedance (tri-state) when RE is high. VOH ≥ VCC-0.4V at 3.3V or ≥0V at 5V with IOUT=-1.5mA; VOL ≤ 0.4V. |
| 2 | RE | input | Receiver enable (active low, overbar in datasheet). When RE is low, the receiver output RO is active; when RE is high, RO enters the high-impedance state. Logic input, VIH ≥ 2.5V (5V VCC) or ≥2.0V (3.3V VCC); VIL ≤ 0.7V. |
| 3 | DE | input | Driver enable (active high). When DE is high, the differential driver on A/B is active; when DE is low, the driver outputs are high-impedance. Logic input, VIH ≥ 2.5V (5V VCC) or ≥2.0V (3.3V VCC); VIL ≤ 0.7V. |
| 4 | DI | input | Driver (transmit) data input. TTL/CMOS-compatible logic input whose level is transmitted as a differential signal on the A/B bus when DE is asserted. VIH ≥ 2.5V (5V VCC); VIL ≤ 0.7V; input current ±2μA max. |
| 5 | GND | power_in | Ground / 0V reference for the device. |
| 6 | A | bidirectional | Non-inverting RS-485 differential bus I/O (bus port A). Driver output when DE=1, receiver input when DE=0. Absolute common-mode input range -7V to +12V; ±20kV HBM ESD; typical differential threshold VTH ≈ -0.2 to 0V. |
| 7 | B | bidirectional | Inverting RS-485 differential bus I/O (bus port B). Driver output when DE=1, receiver input when DE=0. Absolute common-mode input range -7V to +12V; ±20kV HBM ESD. |
| 8 | VCC | power_in | Positive supply. Recommended operating range +2.5V to +6V (absolute max +7V). Typical supply current ICC ≈ 0.48mA (no load, 5V). Bypass with 0.1μF (104) and 10μF (106) to GND per the typical application circuit. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Hangzhou Ruimeng Tech |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
MS3485MS3485MMS3485DNMS3485D
CAD (KiCad official)
- Symbol:
MS3485 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Hangzhou Ruimeng Tech datasheet (None pp, sha256
c6f7a24eab22dd2f, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).