BL3085B

@@ -0,0 +1,47 @@+# BL3085B++**BL Shanghai Belling** · RS-485 / RS-422 ICs · SOIC-8++BL3085B from BL Shanghai Belling, in a SOIC-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. Outputs logic high when A-B differential input is greater than +200mV; outputs logic low when less than -200mV. High-impedance when /RE is high. |+| 2 | /RE | input | Receiver Output Enable, active low. When low, the receiver output RO is enabled; when high, RO is high-impedance. |+| 3 | DE | input | Driver Output Enable, active high. When high, the differential driver outputs A and B are enabled; when low, the driver outputs are high-impedance. |+| 4 | DI | input | Driver Input. Logic input to the differential driver. A logic low forces A low and B high; a logic high forces A high and B low. |+| 5 | GND | power_in | Ground reference (0 V) for supply and I/O signals. |+| 6 | A | bidirectional | Non-inverting driver output and non-inverting receiver input for the RS-485/RS-422 differential bus. |+| 7 | B | bidirectional | Inverting driver output and inverting receiver input for the RS-485/RS-422 differential bus. |+| 8 | VCC | power_in | Positive supply voltage input, 4.75V to 5.25V (5V nominal). Bypass to GND with a 0.1µF capacitor close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOIC-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `BL3085BSOP-8`++## CAD (KiCad official)++- Symbol: `BL3085B`+- 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:** [BL Shanghai Belling datasheet](docs/bl3085b-datasheet.pdf) (8 pp, sha256 `1079f010a53bee3f`, 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/bl3085b-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "bl3085b",+  "version": "0.1.0",+  "type": "component",+  "description": "BL Shanghai Belling RS-485 / RS-422 ICs, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "interface",+    "bl3085b"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "bl3085b.kicad_sym",+    "bl3085b.kicad_mod",+    "bl3085b.glb",+    "bl3085b.step",+    "bl3085b.lbr",+    "docs/hero.png",+    "docs/bl3085b-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file