SP3485EIM

@@ -0,0 +1,56 @@+# SP3485EIM++**HGSEMI** · RS-485 / RS-422 ICs · SOP-8++SP3485EIM from HGSEMI, 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 (active-low) is low and A-B >= +200 mV, RO is driven high; when A-B <= -200 mV, RO is driven low. High-impedance when receiver is disabled. |+| 2 | /RE | input | Receiver output enable (active-low). Low enables the receiver output RO; high tri-states RO. When /RE=high AND DE=low, the device enters low-power shutdown mode. |+| 3 | DE | input | Driver output enable (active-high). High enables the differential driver outputs on A and B; low tri-states them. When /RE=high AND DE=low, the device enters low-power shutdown mode. |+| 4 | DI | input | Driver input. When DE is high, a logic low on DI forces A low and B high; a logic high on DI forces A high and B low. TTL-compatible (VIH >= 2.0 V, VIL <= 0.8 V). |+| 5 | GND | power_in | Ground reference for all signals and supply. |+| 6 | A | bidirectional | Non-inverting differential bus pin. Serves as receiver non-inverting input and driver non-inverting output. Tolerates -7 V to +13 V common-mode range; ESD-protected to +/-15 kV HBM. |+| 7 | B | bidirectional | Inverting differential bus pin. Serves as receiver inverting input and driver inverting output. Tolerates -7 V to +13 V common-mode range; ESD-protected to +/-15 kV HBM. |+| 8 | VCC | power_in | Positive supply, 3.0 V to 3.6 V nominal (3.3 V typical). Absolute max +7 V. Decouple with a 100 nF ceramic capacitor to GND close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SP3485EIM/TR`+- `SP3485EIMSP3485ECM/TR`+- `SP3485EIMSP3485EIN`+- `SP3485EIMSP3485ECN`+- `SP3485EIMM/TR`+- `SP3485EIMSP3485ECMM/TR`+- `SP3485EIMSP3485EIDQ3/TR`+- `SP3485EIMSP3485ECDQ3/TR`+- `SP3485EIM8/TR`+- `SP3485EIMSP3485ECM8/TR`++## CAD (KiCad official)++- Symbol: `SP3485EIM`+- 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:** [HGSEMI datasheet](docs/sp3485eim-datasheet.pdf) (17 pp, sha256 `c05da1a89ebea3bb`, 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/sp3485eim-datasheet.pdf)

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