ADM3485EARZ

@@ -0,0 +1,47 @@+# ADM3485EARZ++**UMW** · RS-485 / RS-422 ICs · SOP-8++ADM3485EARZ 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 | tri_state | Receiver output. When /RE is low and A-B >= 200mV, RO is high; when A-B <= -200mV, RO is low. RO is high-impedance when /RE is high. |+| 2 | /RE | input | Active-low receiver output enable. Low = receiver enabled (RO active); high = receiver output high-impedance. With /RE high AND DE low the device enters low-power shutdown. |+| 3 | DE | input | Driver output enable (active-high). High = driver outputs A/B active; low = driver outputs high-impedance. With /RE high AND DE low the device enters low-power shutdown. |+| 4 | DI | input | Driver input. When DE is high, DI low drives A low and B high; DI high drives A high and B low. Logic input thresholds: VIH >= 2V, VIL <= 0.8V. |+| 5 | GND | power_in | Ground / 0V reference for all voltages. |+| 6 | A | bidirectional | Non-inverting RS-485/RS-422 bus pin: non-inverting receiver input and non-inverting driver output. Common-mode range -7V to +12V; 15kV ESD-protected. |+| 7 | B | bidirectional | Inverting RS-485/RS-422 bus pin: inverting receiver input and inverting driver output. Common-mode range -7V to +12V; 15kV ESD-protected. |+| 8 | VCC | power_in | Positive supply, 3.0V to 3.6V nominal (3.3V typical). Absolute max 7V. Typical supply current 520-540 uA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `ADM3485EARZARZ`++## CAD (KiCad official)++- Symbol: `ADM3485EARZ`+- 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/adm3485earz-datasheet.pdf) (18 pp, sha256 `05653b2e0ae83223`, 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/adm3485earz-datasheet.pdf)

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