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CMT83085

Public Made by Adom

by adom

HopeRF Micro electronics Isolated RS-485/422 Transceivers, SOIC-16-300mil. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs cmt83085: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers cmt83085: viewers · Ray
cmt83085-etched.fit.json cmt83085: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cmt83085-etched.glb cmt83085: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cmt83085-etched.step cmt83085: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cmt83085.glb Publish 0.1.0 · Ray
cmt83085.kicad_mod Publish 0.1.0 · Ray
cmt83085.kicad_sym Publish 0.1.0 · Ray
cmt83085.lbr Publish 0.1.0 · Ray
cmt83085.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json cmt83085: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md cmt83085: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

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)
  • 3D model files: cmt83085-etched.step / cmt83085-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cmt83085.step / cmt83085.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HopeRF Micro electronics datasheet (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