SP485EN

@@ -0,0 +1,47 @@+# SP485EN++**UMW** · RS-485 / RS-422 ICs · SOP-8++SP485EN 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. Logic-level output of the differential receiver. When RE is low and (A-B) > +0.2V, RO=1; when (A-B) < -0.2V, RO=0. VOH >= 3.5V at IO=-4mA; VOL <= 0.4V at IO=4mA. Enters high-impedance state when RE is high. |+| 2 | RE | input | Receiver Output Enable (active-low). When RE=0, the receiver output RO is enabled; when RE=1, RO is placed in a high-impedance (tri-state) condition. VIH >= 2V, VIL <= 0.8V, input current +/-2 uA max. |+| 3 | DE | input | Driver Output Enable (active-high). When DE=1, the differential driver outputs A and B are enabled; when DE=0, both A and B are placed in a high-impedance state. VIH >= 2V, VIL <= 0.8V. |+| 4 | DI | input | Driver Input. Logic-level input that drives the differential bus outputs. When DE=1 and DI=1, A=1 and B=0; when DE=1 and DI=0, A=0 and B=1. VIH >= 2V, VIL <= 0.8V, input current +/-2 uA max. |+| 5 | GND | power_in | Ground reference (0V) for both the logic and the differential bus interface. |+| 6 | A | bidirectional | Non-inverting driver output / non-inverting receiver input (RS-485/RS-422 bus line A). Withstands -7V to +13V common-mode. Receiver threshold VTH = -0.2V to +0.2V (differential A-B). Input resistance >= 12 kOhm. Driver differential output >= 1.5V into a 27 Ohm load. |+| 7 | B | bidirectional | Inverting driver output / inverting receiver input (RS-485/RS-422 bus line B). Withstands -7V to +13V common-mode. Complementary to line A. Input resistance >= 12 kOhm. |+| 8 | VCC | power_in | Positive supply input. Single 5V supply (4.75V to 5.25V, +/-5%). Absolute maximum 7V. Quiescent supply current typically 900 uA (max). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SP485ENEN`++## CAD (KiCad official)++- Symbol: `SP485EN`+- 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/sp485en-datasheet.pdf) (9 pp, sha256 `ff31376d6581230b`, 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/sp485en-datasheet.pdf)

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