SIT3485EUA

@@ -0,0 +1,48 @@+# SIT3485EUA++**SIT** · RS-485 / RS-422 ICs · MSOP-8++SIT3485EUA from SIT, in a MSOP-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 enabled (RE low), RO outputs the logic level received from the differential bus (A-B). High-impedance when RE is high. |+| 2 | RE | input | Receiver Output Enable (active low). Drive low to enable the receiver output RO; drive high to place RO in high-impedance state. |+| 3 | DE | input | Driver Output Enable (active high). Drive high to enable the driver outputs A and B; drive low to place them in high-impedance state. |+| 4 | DI | input | Driver Input. Logic level applied here is transmitted onto the differential bus (A-B) when the driver is enabled (DE high). |+| 5 | GND | power_in | Ground reference (0 V) for the device. |+| 6 | A | bidirectional | Non-inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is high when V(A) - V(B) > +200 mV. |+| 7 | B | bidirectional | Inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is low when V(A) - V(B) < -200 mV. |+| 8 | VCC | power_in | Positive supply voltage input, 3.0 V to 3.6 V (typ 3.3 V). Bypass with 0.1 uF to GND close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SIT |+| Package | MSOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SIT3485EUA`++## CAD (KiCad official)++- Symbol: `SIT3485EUA`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SIT datasheet](docs/sit3485eua-datasheet.pdf) (13 pp, sha256 `5b55f1879c7f2a4b`, 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/sit3485eua-datasheet.pdf)

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