component
CM3085E
Public Made by Adomby adom
coileasy RS-485 / RS-422 ICs, SOP-8-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
CM3085E
coileasy · RS-485 / RS-422 ICs · SOP-8-150mil
CM3085E from coileasy, in a SOP-8-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RO | output | Receiver output: with RE low, RO is high when A-B is at or above -50 mV and low when A-B is at or below -200 mV. |
| 2 | RE | input | Receiver output enable, active low: RE low enables RO, RE high puts RO in high impedance, and RE high with DE low selects low-power mode. |
| 3 | DE | input | Driver output enable: DE high enables the A/B outputs, DE low puts A/B in high impedance, and RE high with DE low selects low-power mode. |
| 4 | DI | input | Driver input: DI high drives A high and B low, DI low drives A low and B high; the logic input high threshold is 2.0 V minimum and the low threshold is 0.8 V maximum. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Receiver non-inverting input and driver non-inverting output; bus voltage rated -8 V to 13 V. |
| 7 | B | bidirectional | Receiver inverting input and driver inverting output; bus voltage rated -8 V to 13 V. |
| 8 | VCC | power_in | Supply voltage: recommended 3.0 V to 5.5 V, absolute maximum 7 V with respect to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | coileasy |
| Package | SOP-8-150mil |
| Category | Interface |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 7 | V | 3 | ||
| Logic input/output voltage (DE, RE, DI, RO) | -0.3 | V | max printed as VCC+0.3 V | 3 | |||
| Bus input/output voltage (A, B) | -8 | 13 | V | 3 | |||
| Logic output current (RO) | -10 | 10 | mA | 3 | |||
| Continuous power dissipation SOP8 | 471 | mW | 3 | ||||
| Operating temperature range (ambient) | -40 | 85 | °C | 3 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Soldering temperature | 300 | °C | 3 | ||||
| ESD HBM, bus pins A/B | -15 | 15 | kV | Human body model, bus pins A/B | 3 | ||
| ESD MM, bus pins A/B | -800 | 800 | V | Machine model, bus pins A/B | 3 | ||
| ESD IEC 61000-4-2 contact discharge, bus pins A/B | -12 | 12 | kV | Contact discharge | 3 | ||
| ESD IEC 61000-4-2 air discharge, bus pins A/B | -15 | 15 | kV | Air discharge | 3 | ||
| ESD HBM, other pins | -6 | 6 | kV | Human body model, other pins | 3 | ||
| ESD MM, other pins | -400 | 400 | V | Machine model, other pins | 3 | ||
| Supply voltage | VCC | 3 | 5.5 | V | 4 | ||
| Data rate | DR | 0 | 500 | kbps | 4 | ||
| Ambient temperature | TA | -40 | 85 | °C | 4 | ||
| Supply input voltage | VCC | 3 | 5 | 5.5 | V | 4 | |
| Differential driver output voltage (no load) | VOD1 | 1.5 | V | No load; max printed as VCC | 4 | ||
| Differential driver output voltage (RS-422) | VOD2 | 2 | V | R=50 Ω (RS-422), Fig. B1; max printed as VCC | 4 | ||
| Differential driver output voltage (RS-485) | VOD2 | 1.5 | V | R=27 Ω (RS-485), Fig. B1 | 4 | ||
| Differential output voltage magnitude symmetry | ΔVOD | 200 | mV | R=50 Ω or R=27 Ω | 4 | ||
| Driver common-mode output voltage | VOC | 1 | 3 | V | 4 | ||
| Common-mode output voltage magnitude symmetry | ΔVOC | 200 | mV | 4 | |||
| Logic input high voltage | VIH1 | 2 | V | DE, RE, DI | 4 | ||
| Logic input low voltage | VIL1 | 0.8 | V | 4 | |||
| Bus input current (receive mode), positive | IIN | 125 | µA | Receive mode, DE=GND, VCC=GND / 5.25V, VA,VB=12V | 4 | ||
| Bus input current (receive mode), negative | IIN | -75 | µA | Receive mode, DE=GND, VCC=GND / 5.25V, VA,VB=-7V | 4 | ||
| Driver short-circuit output current | IOSD | -250 | mA | -7 V ≤ VOUT ≤ VCC | 4 | ||
| Driver short-circuit output current | IOSD | 250 | mA | 0 V ≤ VOUT ≤ 12 V | 4 | ||
| Driver short-circuit output current | IOSD | -25 | 25 | mA | 0 V ≤ VOUT ≤ VCC | 4 | |
| Differential threshold voltage | VTH | -200 | -110 | -50 | mV | -7 V ≤ VOUT ≤ 12 V (VCC=5.0 V); -7 V ≤ VOUT ≤ 6 V (VCC=3.3 V) | 4 |
| Receiver output low voltage | VOL | 0.4 | V | IO=4 mA, VID<-200 mV | 5 | ||
| High-impedance output current (RO) | IOZR | -1 | 1 | µA | 0.4 V ≤ VO ≤ 2.4 V | 5 | |
| Receiver output short-circuit current | IOSR | -7 | 95 | mA | 0 V ≤ VRO ≤ VCC | 5 | |
| Static supply current (transmit mode, no load) | ICC | 150 | 600 | µA | No load; RE=DI=VCC, DE=VCC | 5 | |
| Static supply current (receive mode, no load) | ICC | 120 | 600 | µA | No load; RE=DI=GND, DE=GND | 5 | |
| Low-power shutdown current | ISHDN | 0.1 | 10 | µA | DE=GND, RE=VCC, DI=VCC or GND | 5 | |
| Maximum data rate | DRMAX | 500 | kbps | 5 | |||
| Driver propagation delay, low-to-high | tDLH | 250 | 720 | 900 | ns | RDIFF=54 Ω, CL1=CL2=100 pF, Fig. B2 | 5 |
| Driver propagation delay, high-to-low | tDHL | 200 | 530 | 750 | ns | RDIFF=54 Ω, CL1=CL2=100 pF, Fig. B2 | 5 |
| Driver pulse width distortion | tDPWD | 3 | 100 | ns | /tDLH - tDHL/ | 5 | |
| Driver enable to output high | tDZH | 2.5 | µs | CL=100 pF, S2 closed, Fig. B5 | 5 | ||
| Driver enable to output low | tDZL | 2.5 | µs | CL=100 pF, S1 closed, Fig. B5 | 5 | ||
| Driver output high to high-impedance | tDHZ | 100 | ns | CL=15 pF, S2 closed, Fig. B5 | 5 | ||
| Driver output low to high-impedance | tDLZ | 100 | ns | CL=15 pF, S1 closed, Fig. B5 | 5 | ||
| Driver enable from low-power mode to output high | tDZH(SHDN) | 4.5 | µs | CL=15 pF, S2 closed, Fig. B5 | 5 | ||
| Receiver propagation delay, low-to-high | tRLH | 127 | 200 | ns | /VID/ ≥ 2.0 V, Fig. B3 | 6 | |
| Receiver pulse width distortion | tRPWD | 3 | 30 | ns | /tRLH - tRHL/ | 6 | |
| Receiver enable to output low | tRZL | 20 | 50 | ns | CL=100 pF, S1 closed, Fig. B4 | 6 | |
| Receiver enable to output high | tRZH | 20 | 50 | ns | CL=100 pF, S2 closed, Fig. B4 | 6 | |
| Receiver enable from low-power mode to output high | tRZH(SHDN) | 3.5 | µs | CL=100 pF, S2 closed, Fig. B4 | 6 | ||
| Low-power mode time (enable to low-power transition) | tSHDN | 50 | 200 | 600 | ns | 6 |
CAD (KiCad official)
- Symbol:
CM3085E - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8-150mil (KiCad packages3D, STEP)
- 3D model files:
cm3085e-etched.step/cm3085e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cm3085e.step/cm3085e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: coileasy datasheet (14 pp, sha256
141883afbcd18333, retrieved 2026-10-17, 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: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# CM3085E
**coileasy** · RS-485 / RS-422 ICs · SOP-8-150mil
CM3085E from coileasy, in a SOP-8-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RO | output | Receiver output: with RE low, RO is high when A-B is at or above -50 mV and low when A-B is at or below -200 mV. |
| 2 | RE | input | Receiver output enable, active low: RE low enables RO, RE high puts RO in high impedance, and RE high with DE low selects low-power mode. |
| 3 | DE | input | Driver output enable: DE high enables the A/B outputs, DE low puts A/B in high impedance, and RE high with DE low selects low-power mode. |
| 4 | DI | input | Driver input: DI high drives A high and B low, DI low drives A low and B high; the logic input high threshold is 2.0 V minimum and the low threshold is 0.8 V maximum. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Receiver non-inverting input and driver non-inverting output; bus voltage rated -8 V to 13 V. |
| 7 | B | bidirectional | Receiver inverting input and driver inverting output; bus voltage rated -8 V to 13 V. |
| 8 | VCC | power_in | Supply voltage: recommended 3.0 V to 5.5 V, absolute maximum 7 V with respect to GND. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | coileasy |
| Package | SOP-8-150mil |
| Category | Interface |
| Pins | 8 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | | 7 | V | | 3 |
| Logic input/output voltage (DE, RE, DI, RO) | | -0.3 | | | V | max printed as VCC+0.3 V | 3 |
| Bus input/output voltage (A, B) | | -8 | | 13 | V | | 3 |
| Logic output current (RO) | | -10 | | 10 | mA | | 3 |
| Continuous power dissipation SOP8 | | | | 471 | mW | | 3 |
| Operating temperature range (ambient) | | -40 | | 85 | °C | | 3 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 3 |
| Soldering temperature | | | | 300 | °C | | 3 |
| ESD HBM, bus pins A/B | | -15 | | 15 | kV | Human body model, bus pins A/B | 3 |
| ESD MM, bus pins A/B | | -800 | | 800 | V | Machine model, bus pins A/B | 3 |
| ESD IEC 61000-4-2 contact discharge, bus pins A/B | | -12 | | 12 | kV | Contact discharge | 3 |
| ESD IEC 61000-4-2 air discharge, bus pins A/B | | -15 | | 15 | kV | Air discharge | 3 |
| ESD HBM, other pins | | -6 | | 6 | kV | Human body model, other pins | 3 |
| ESD MM, other pins | | -400 | | 400 | V | Machine model, other pins | 3 |
| Supply voltage | VCC | 3 | | 5.5 | V | | 4 |
| Data rate | DR | 0 | | 500 | kbps | | 4 |
| Ambient temperature | TA | -40 | | 85 | °C | | 4 |
| Supply input voltage | VCC | 3 | 5 | 5.5 | V | | 4 |
| Differential driver output voltage (no load) | VOD1 | 1.5 | | | V | No load; max printed as VCC | 4 |
| Differential driver output voltage (RS-422) | VOD2 | 2 | | | V | R=50 Ω (RS-422), Fig. B1; max printed as VCC | 4 |
| Differential driver output voltage (RS-485) | VOD2 | 1.5 | | | V | R=27 Ω (RS-485), Fig. B1 | 4 |
| Differential output voltage magnitude symmetry | ΔVOD | | | 200 | mV | R=50 Ω or R=27 Ω | 4 |
| Driver common-mode output voltage | VOC | 1 | | 3 | V | | 4 |
| Common-mode output voltage magnitude symmetry | ΔVOC | | | 200 | mV | | 4 |
| Logic input high voltage | VIH1 | 2 | | | V | DE, RE, DI | 4 |
| Logic input low voltage | VIL1 | | | 0.8 | V | | 4 |
| Bus input current (receive mode), positive | IIN | | | 125 | µA | Receive mode, DE=GND, VCC=GND / 5.25V, VA,VB=12V | 4 |
| Bus input current (receive mode), negative | IIN | -75 | | | µA | Receive mode, DE=GND, VCC=GND / 5.25V, VA,VB=-7V | 4 |
| Driver short-circuit output current | IOSD | -250 | | | mA | -7 V ≤ VOUT ≤ VCC | 4 |
| Driver short-circuit output current | IOSD | | | 250 | mA | 0 V ≤ VOUT ≤ 12 V | 4 |
| Driver short-circuit output current | IOSD | -25 | | 25 | mA | 0 V ≤ VOUT ≤ VCC | 4 |
| Differential threshold voltage | VTH | -200 | -110 | -50 | mV | -7 V ≤ VOUT ≤ 12 V (VCC=5.0 V); -7 V ≤ VOUT ≤ 6 V (VCC=3.3 V) | 4 |
| Receiver output low voltage | VOL | | | 0.4 | V | IO=4 mA, VID<-200 mV | 5 |
| High-impedance output current (RO) | IOZR | -1 | | 1 | µA | 0.4 V ≤ VO ≤ 2.4 V | 5 |
| Receiver output short-circuit current | IOSR | -7 | | 95 | mA | 0 V ≤ VRO ≤ VCC | 5 |
| Static supply current (transmit mode, no load) | ICC | | 150 | 600 | µA | No load; RE=DI=VCC, DE=VCC | 5 |
| Static supply current (receive mode, no load) | ICC | | 120 | 600 | µA | No load; RE=DI=GND, DE=GND | 5 |
| Low-power shutdown current | ISHDN | | 0.1 | 10 | µA | DE=GND, RE=VCC, DI=VCC or GND | 5 |
| Maximum data rate | DRMAX | | | 500 | kbps | | 5 |
| Driver propagation delay, low-to-high | tDLH | 250 | 720 | 900 | ns | RDIFF=54 Ω, CL1=CL2=100 pF, Fig. B2 | 5 |
| Driver propagation delay, high-to-low | tDHL | 200 | 530 | 750 | ns | RDIFF=54 Ω, CL1=CL2=100 pF, Fig. B2 | 5 |
| Driver pulse width distortion | tDPWD | | 3 | 100 | ns | /tDLH - tDHL/ | 5 |
| Driver enable to output high | tDZH | | | 2.5 | µs | CL=100 pF, S2 closed, Fig. B5 | 5 |
| Driver enable to output low | tDZL | | | 2.5 | µs | CL=100 pF, S1 closed, Fig. B5 | 5 |
| Driver output high to high-impedance | tDHZ | | | 100 | ns | CL=15 pF, S2 closed, Fig. B5 | 5 |
| Driver output low to high-impedance | tDLZ | | | 100 | ns | CL=15 pF, S1 closed, Fig. B5 | 5 |
| Driver enable from low-power mode to output high | tDZH(SHDN) | | | 4.5 | µs | CL=15 pF, S2 closed, Fig. B5 | 5 |
| Receiver propagation delay, low-to-high | tRLH | | 127 | 200 | ns | /VID/ ≥ 2.0 V, Fig. B3 | 6 |
| Receiver pulse width distortion | tRPWD | | 3 | 30 | ns | /tRLH - tRHL/ | 6 |
| Receiver enable to output low | tRZL | | 20 | 50 | ns | CL=100 pF, S1 closed, Fig. B4 | 6 |
| Receiver enable to output high | tRZH | | 20 | 50 | ns | CL=100 pF, S2 closed, Fig. B4 | 6 |
| Receiver enable from low-power mode to output high | tRZH(SHDN) | | | 3.5 | µs | CL=100 pF, S2 closed, Fig. B4 | 6 |
| Low-power mode time (enable to low-power transition) | tSHDN | 50 | 200 | 600 | ns | | 6 |
## CAD (KiCad official)
- Symbol: `CM3085E`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8-150mil (KiCad packages3D, STEP)
- 3D model files: `cm3085e-etched.step` / `cm3085e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cm3085e.step` / `cm3085e.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [coileasy datasheet](docs/cm3085e-datasheet.pdf) (14 pp, sha256 `141883afbcd18333`, retrieved 2026-10-17, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/cm3085e-datasheet.pdf)