ST3485EBDR

@@ -0,0 +1,47 @@+# ST3485EBDR++**UMW** · RS-485/RS-422 ICs · SOP-8++ST3485EBDR from UMW, 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 | RO | output | Receiver output. When /RE is low: if (A-B) >= 200 mV, RO = high; if (A-B) <= -200 mV, RO = low. High-impedance when /RE is high. |+| 2 | /RE | input | Active-low receiver output enable. /RE low enables receiver output on RO; /RE high tristates RO. With /RE high and DE low, the device enters low-power shutdown. |+| 3 | DE | input | Driver output enable. DE high enables the differential driver on A/B; DE low tristates the driver outputs. With /RE high and DE low, the device enters low-power shutdown. |+| 4 | DI | input | Driver input. With DE high, DI low forces non-inverting 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. |+| 6 | A | bidirectional | Non-inverting RS-485/RS-422 bus pin. Non-inverting receiver input and non-inverting driver output. Absolute maximum bus voltage -7 V to +13 V. |+| 7 | B | bidirectional | Inverting RS-485/RS-422 bus pin. Inverting receiver input and inverting driver output. Absolute maximum bus voltage -7 V to +13 V. |+| 8 | VCC | power_in | Power supply input. Operating range 3.0 V to 3.6 V (typ 3.3 V). Absolute maximum 7 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Comm/UART |+| Pins | 8 |++## Ordering variants++- `ST3485EBDRDR`++## CAD (KiCad official)++- Symbol: `ST3485EBDR`+- 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](docs/st3485ebdr-datasheet.pdf) (17 pp, sha256 `a8e8c3814e8156fa`, 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/st3485ebdr-datasheet.pdf)

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