MAX485EIM

@@ -0,0 +1,57 @@+# MAX485EIM++**HGSEMI** · RS-485 / RS-422 ICs · SOP-8++MAX485EIM 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. With /RE low, RO is high when (A−B) ≥ +50mV and low when (A−B) ≤ −200mV. High-impedance when /RE is high. |+| 2 | /RE | input | Receiver output enable (active low). RO is enabled when /RE is low and high-impedance when /RE is high. Hot-swap capable input. With /RE=high and DE=low the device enters low-power shutdown. |+| 3 | DE | input | Driver output enable (active high). Driver outputs A/B are enabled when DE is high and high-impedance when DE is low. Hot-swap capable input. With /RE=high and DE=low the device enters low-power shutdown. |+| 4 | DI | input | Driver input. With DE high, a low on DI forces A low and B high; a high on DI forces A high and B low. |+| 5 | GND | power_in | Ground reference (0V). |+| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output on the RS-485/RS-422 bus. Absolute range −7V to +12V; ±16kV IEC 61000-4-2 ESD protected. |+| 7 | B | bidirectional | Inverting receiver input and inverting driver output on the RS-485/RS-422 bus. Absolute range −7V to +12V; ±16kV IEC 61000-4-2 ESD protected. |+| 8 | VCC | power_in | Positive supply, 4.5V ≤ VCC ≤ 5.5V. Bypass to GND with 0.1µF. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `MAX485EIMMAX485ECM/TR`+- `MAX485EIM/TR`+- `MAX485EIMMAX485ECN`+- `MAX485EIMMAX485EIN`+- `MAX485EIMMAX485ECMM/TR`+- `MAX485EIMM/TR`+- `MAX485EIMMAX485ECDQ/TR`+- `MAX485EIMMAX485ECDQ3/TR`+- `MAX485EIMMAX485EIDQ/TR`+- `MAX485EIMMAX485EIDQ3/TR`++## CAD (KiCad official)++- Symbol: `MAX485EIM`+- 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/max485eim-datasheet.pdf) (18 pp, sha256 `0deaafe2ee86f8ed`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/max485eim-datasheet.pdf)

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