MAX3485ESA

@@ -0,0 +1,47 @@+# MAX3485ESA++**UMW** · RS-485 / RS-422 ICs · SOP-8++MAX3485ESA 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: RO = high if (A-B) >= 200mV, RO = low if (A-B) <= -200mV. High impedance when /RE is high. |+| 2 | /RE | input | Receiver output enable, active low. /RE low enables the receiver output RO; /RE high tri-states RO. When /RE is high and DE is low, the device enters low-power shutdown. |+| 3 | DE | input | Driver output enable, active high. DE high enables the driver outputs A/B; DE low places them in high-impedance. When /RE is high and DE is low, the device enters low-power shutdown. |+| 4 | DI | input | Driver input. When DE is high, DI low forces A low and B high; DI high forces A high and B low. TTL/CMOS logic levels (VIH >= 2V, VIL <= 0.8V). |+| 5 | GND | power_in | Ground reference for the device. Common return for VCC, logic and bus signals. |+| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output (RS-485/RS-422 differential bus line A). Rated for -7V to +13V bus voltage; receiver input resistance >= 96k (1/8 unit load). |+| 7 | B | bidirectional | Inverting receiver input and inverting driver output (RS-485/RS-422 differential bus line B). Rated for -7V to +13V bus voltage; receiver input resistance >= 96k (1/8 unit load). |+| 8 | VCC | power_in | Positive supply, 3.0V to 3.6V nominal (3.3V typical). Absolute maximum 7V. Decouple to GND with a 0.1uF ceramic capacitor near the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `MAX3485ESAESA`++## CAD (KiCad official)++- Symbol: `MAX3485ESA`+- 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/max3485esa-datasheet.pdf) (17 pp, sha256 `aa3ff7b2b9b7fe97`, 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/max3485esa-datasheet.pdf)

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