# SL3490EESA

**Slkor SLKORMICRO Elec** · RS-485 / RS-422 ICs · SOP-8

SL3490EESA from Slkor SLKORMICRO Elec, in a SOP-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 | VCC | power_in | Positive supply. Operating range 3.0V to 5.5V; absolute maximum +7V. Decouple to GND with a bypass capacitor near the pin. |
| 2 | RO | output | Receiver output. Outputs high when (A-B) ≥ +200mV and low when (A-B) ≤ -200mV. VOH ≥ VCC-1.5V at IOUT=-4mA, VOL ≤ 0.4V at IOUT=+4mA. High under open/short (failsafe). |
| 3 | DI | input | Driver input. A low on DI forces Y low and Z high; a high on DI forces Y high and Z low. VIH ≥ 2.0V, VIL ≤ 0.8V, input current ±2µA. |
| 4 | GND | power_in | Ground reference for the device. All voltages are referenced to this pin. |
| 5 | Y | output | Non-inverting driver output to RS-485/RS-422 bus. Differential driver output VOD ≥ 1.5V with RL=54Ω or 100Ω; short-circuit current limited to ±250mA max. ±15kV HBM ESD protection. |
| 6 | Z | output | Inverting driver output to RS-485/RS-422 bus. Differential driver output VOD ≥ 1.5V with RL=54Ω or 100Ω; short-circuit current limited to ±250mA max. ±15kV HBM ESD protection. |
| 7 | B | input | Inverting receiver input from RS-485/RS-422 bus. Common-mode range -7V to +12V; receiver input impedance 96kΩ (1/8 unit load). ±15kV HBM ESD protection. |
| 8 | A | input | Non-inverting receiver input from RS-485/RS-422 bus. Common-mode range -7V to +12V; receiver input impedance 96kΩ (1/8 unit load). ±15kV HBM ESD protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `SL3490EESA`
- `SL3490EEPA`
- `SL3490EEUA`

## CAD (KiCad official)

- Symbol: `SL3490EESA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `sl3490eesa-etched.step` / `sl3490eesa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sl3490eesa.step` / `sl3490eesa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Slkor SLKORMICRO Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603061139001790464) (None pp, sha256 `ca101c925cc431ab`, retrieved 2026-08-17, tier: lcsc)
- **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).

[Datasheet PDF](docs/sl3490eesa-datasheet.pdf)