CMT83085

@@ -0,0 +1,52 @@+# CMT83085++**HopeRF Micro electronics** · Isolated RS-485/422 Transceivers · SOIC-16-300mil++CMT83085 from HopeRF Micro electronics, in a SOIC-16-300mil. 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 | VDD1 | power_in | Isolation side 1 (logic side) supply voltage. Operating range 2.5V to 5.5V. Requires a 0.1µF bypass capacitor to GND1 placed as close to the pin as possible. |+| 2 | GND1 | power_in | Isolation side 1 ground reference. Must be tied together with pins 7 and 8. |+| 3 | R | output | Receiver output. Digital output on the logic side that reflects the RS-485 bus differential input (A-B). Drives the host UART RX line. |+| 4 | /RE | input | Receiver enable input, active low. When low, the receiver output R is enabled; when high, R is high-impedance. Has an internal pull-up (IPU ≤ 10µA). |+| 5 | DE | input | Driver enable input, active high. When high, the driver outputs A/B are enabled; when low, A/B are high-impedance. Has an internal pull-down (IPD ≈ -10µA). |+| 6 | D | input | Driver transmit data input. Digital input on the logic side from the host UART TX line; drives the RS-485 bus outputs A/B when DE is high. Has internal pull-up (IPU ≤ 10µA). |+| 7 | GND1 | power_in | Isolation side 1 ground reference (tied internally/externally to pin 2). |+| 8 | GND1 | power_in | Isolation side 1 ground reference (tied internally/externally to pin 2). |+| 9 | GND2 | power_in | Isolation side 2 (bus side) ground reference. Isolated from GND1 by the on-die isolation barrier. |+| 10 | GND2 | power_in | Isolation side 2 ground reference (tied together with pins 9 and 15). |+| 11 | NC | unconnected | No connect. Leave floating or tie to GND2 for board layout convenience. |+| 12 | A | bidirectional | RS-485 bus non-inverting driver output / receiver input. When the driver is disabled or VDD1/VDD2 loses power, A enters a high-impedance state to avoid loading the bus. Absolute-max bus voltage range -7V to +12V. |+| 13 | B | bidirectional | RS-485 bus inverting driver output / receiver input. When the driver is disabled or VDD1/VDD2 loses power, B enters a high-impedance state to avoid loading the bus. Absolute-max bus voltage range -7V to +12V. |+| 14 | NC | unconnected | No connect. Leave floating or tie to GND2 for board layout convenience. |+| 15 | GND2 | power_in | Isolation side 2 ground reference (tied together with pins 9 and 10). |+| 16 | VDD2 | power_in | Isolation side 2 (RS-485 bus side) supply voltage. Operating range 3.0V to 5.5V. Requires a 10µF bypass capacitor to GND2 placed as close to the pin as possible. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HopeRF Micro electronics |+| Package | SOIC-16-300mil |+| Category | Signal Isolation Devices |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `CMT83085`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HopeRF Micro electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604430429135126528) (22 pp, sha256 `eba3fab9dcb0563f`, 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/cmt83085-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "cmt83085",+  "version": "0.1.0",+  "type": "component",+  "description": "HopeRF Micro electronics Isolated RS-485/422 Transceivers, SOIC-16-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "signal isolation devices",+    "cmt83085"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "cmt83085.kicad_sym",+    "cmt83085.kicad_mod",+    "cmt83085.glb",+    "cmt83085.step",+    "cmt83085.lbr",+    "docs/hero.png",+    "docs/cmt83085-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file