SP3485EEN

@@ -0,0 +1,47 @@+# SP3485EEN++**UMW** · RS-485 / RS-422 ICs · SOP-8++SP3485EEN from UMW, in a SOP-8. Pinout and pin descriptions extracted from the datasheet (via LCSC) by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | RO | output | Receiver output. When /RE is low: RO = high if (A-B) >= 200 mV, RO = low if (A-B) <= -200 mV. High-impedance when receiver is disabled. |+| 2 | /RE | input | Active-low receiver output enable. When /RE = low, receiver is enabled and RO is driven. When /RE = high, receiver output is high-impedance. If /RE = high AND DE = low, the device enters low-power shutdown mode. |+| 3 | DE | input | Driver output enable. When DE = high, driver outputs (A, B) are enabled. When DE = low, driver outputs are high-impedance. If /RE = high AND DE = low, the device enters low-power shutdown mode. |+| 4 | DI | input | Driver data input. When DE = high: DI low forces non-inverting driver output A low and inverting output B high; DI high forces A high and B low. |+| 5 | GND | power_in | Ground reference for the device. All voltages are referenced to this pin. |+| 6 | A | bidirectional | Non-inverting RS-485 bus pin: non-inverting receiver input and non-inverting driver output. Bus-side voltage tolerance -7 V to +13 V; receiver input resistance >= 96 kΩ (1/8 unit load). |+| 7 | B | bidirectional | Inverting RS-485 bus pin: inverting receiver input and inverting driver output. Bus-side voltage tolerance -7 V to +13 V; receiver input resistance >= 96 kΩ (1/8 unit load). |+| 8 | VCC | power_in | Supply voltage input, 3.0 V to 3.6 V (nominal 3.3 V). Absolute maximum 7 V. Typical supply current 520-540 µA. Bypass locally with a 0.1 µF capacitor to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SP3485EENEN`++## CAD (KiCad official)++- Symbol: `SP3485EEN`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](https://datasheet.lcsc.com/datasheet/pdf/be136549ee88853d009db0d636777171.pdf) (18 pp, sha256 `06fdac69a6ccf46e`, 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/sp3485een-datasheet.pdf)

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