ADM3485

@@ -0,0 +1,52 @@+# ADM3485++**Analog Devices** · RS-485 transceiver · SOIC-8++Half-duplex RS-485/RS-422 transceiver running from a single 3.3 V supply. A driver and receiver share the A/B bus pair, with DE enabling the driver and RE the receiver, so one chip both sends and listens on a two-wire multidrop line up to 12 Mbps. It supports up to 32 nodes on a bus and holds valid receiver output for open, short, and idle lines. A standard 3.3 V RS-485 interface for industrial serial links.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | RO | output | Receiver Output. When the receiver is enabled (RE low), if A − B > 200 mV then RO = high; if A − B < −200 mV then RO = low. Drives CMOS logic levels referenced to VCC (3.3 V). |+| 2 | RE | input | Receiver Output Enable (active low). A low level enables the receiver output RO; a high level places it in high impedance. If RE is high and DE is low, the device enters low power shutdown mode. |+| 3 | DE | input | Driver Output Enable (active high). A high level enables the differential driver outputs A and B; a low level places them in high impedance. If RE is high and DE is low, the device enters low power shutdown mode. |+| 4 | DI | input | Driver Input. With the driver enabled (half-duplex), a logic low on DI forces A low and B high; a logic high on DI forces A high and B low. CMOS input, VIH ≥ 2.0 V, VIL ≤ 0.8 V. |+| 5 | GND | power_in | Ground reference (0 V) for the transceiver. |+| 6 | A | bidirectional | Noninverting Receiver Input A and Noninverting Driver Output A (shared bus pin in half-duplex operation). Bus common-mode range −7 V to +12 V; receiver input impedance 12 kΩ minimum. |+| 7 | B | bidirectional | Inverting Receiver Input B and Inverted Driver Output B (shared bus pin in half-duplex operation). Bus common-mode range −7 V to +12 V; receiver input impedance 12 kΩ minimum. |+| 8 | VCC | power_in | Power Supply, 3.3 V ± 0.3 V. Absolute maximum 7 V to GND. Typical ICC = 1.1 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | RS-485 / RS-422 transceiver (half-duplex) |+| Supply | 3.3 V |+| Data rate | Up to 12 Mbps |+| Bus loading | Up to 32 nodes |+| Enables | DE (driver), RE (receiver) |+| Fail-safe | Receiver defined for open/short/idle |+| Package | SOIC-8 |++## Ordering variants++- `ADM3485ARZ (SOIC-8)`+- `ADM3485EARZ (SOIC-8, +/-15 kV ESD)`+- `ADM3485ARMZ (MSOP-8)`++## CAD (KiCad official)++- Symbol: `Interface_UART:ADM3485xR (KiCad official)`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/ADM3483_3485_3488_3490_3491.pdf) (20 pp, sha256 `e7fcba7f9a3919f7`, retrieved 2026-08-17, tier: manufacturer)+- **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/adm3485-datasheet.pdf)

@@ -0,0 +1,38 @@+{+  "slug": "adm3485",+  "version": "0.1.0",+  "type": "component",+  "description": "ADI 3.3 V RS-485/RS-422 transceiver, SOIC-8. Half-duplex, up to 12 Mbps, 32 nodes. Datasheet-verified.",+  "tags": [+    "component",+    "interface",+    "rs-485",+    "rs-422",+    "transceiver",+    "soic-8",+    "analog-devices"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "adm3485.kicad_sym",+    "adm3485.kicad_mod",+    "adm3485.glb",+    "adm3485.step",+    "adm3485.lbr",+    "docs/hero.png",+    "docs/adm3485-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file