component
MAX3085ECMM
Public Made by Adomby adom
HGSEMI RS-485 / RS-422 ICs, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MAX3085ECMM
HGSEMI · RS-485 / RS-422 ICs · MSOP-8
MAX3085ECMM from HGSEMI, in a MSOP-8. 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: driven high when RE is low and A−B is ≥ −50 mV, and driven low when A−B is ≤ −200 mV; high-impedance when RE is high. |
| 2 | ~{RE} | input | Receiver output enable, active low: RO is enabled when RE is low and goes high-impedance when RE is high; RE high with DE low puts the device into low-power shutdown. |
| 3 | DE | input | Driver output enable: the driver outputs are active when DE is high and high-impedance when DE is low; DE low with RE high puts the device into low-power shutdown. |
| 4 | DI | input | Driver input: when DE is high, a low on DI drives A/Y low and B/Z high, and a high on DI drives A/Y high and B/Z low. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Bus pin A: non-inverting receiver input and non-inverting driver output (A/Y), intended for connection to the RS-485/RS-422 bus. |
| 7 | B | bidirectional | Bus pin B: inverting receiver input and inverting driver output (B/Z), intended for connection to the RS-485/RS-422 bus. |
| 8 | VCC | power_in | Positive supply, 4.5 V to 5.5 V; the datasheet recommends a 0.1 µF capacitor to ground. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | MSOP-8 |
| 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 | 4.5 | 5.5 | V | 5 | ||
| Differential driver output voltage (RS-422 load) | VOD | 2.7 | V | 图1，RL=100Ω（RS-422） | 5 | ||
| Differential driver output voltage (RS-485 load) | VOD | 2.1 | V | 图1，RL=54Ω（RS-485） | 5 | ||
| Change in differential driver output voltage magnitude | ΔVOD | 0.2 | V | 图1，RL=100Ω 或 RL=54Ω | 5 | ||
| Driver common-mode output voltage | VOC | 3 | V | 图1，RL=100Ω 或 RL=54Ω | 5 | ||
| Change in common-mode output voltage magnitude | ΔVOC | 0.2 | V | 图1，RL=100Ω 或 RL=54Ω | 5 | ||
| Input high voltage (DE, DI, RE) | VIH | 2 | V | 5 | |||
| Input low voltage (DE, DI, RE) | VIL | 0.8 | V | 5 | |||
| Input current (DE, DI, RE) | IIN | -1 | 1 | μA | 5 | ||
| Input current (A, B) full duplex, max | IA, IB | 125 | μA | DE=GND, VCC=GND或VCC, VIN=12V | 5 | ||
| Input current (A, B) full duplex, min | IA, IB | -75 | μA | DE=GND, VCC=GND或VCC, VIN=-7V | 5 | ||
| Driver short-circuit output current, max | IOSD | 250 | mA | 0≦VOUT≦12V | 5 | ||
| Driver short-circuit output current, min | IOSD | -250 | mA | -7≦VOUT≦VCC | 5 | ||
| Driver foldback short-circuit current, max | IOSDF | 20 | mA | Vcc-1V≦VOUT≦Vcc+0.5V | 5 | ||
| Driver foldback short-circuit current, min | IOSDF | -20 | mA | -0.5V≦VOUT≦+1V | 5 | ||
| Receiver differential threshold voltage | VTH | -200 | -125 | -50 | mV | -7V≦VCM≦12V | 5 |
| Receiver output low voltage | VOL | 0.4 | V | IO= 4mA，VID=-200mV | 5 | ||
| Receiver three-state output current | IOZR | -1 | 1 | μA | 0≦VO≦VCC | 5 | |
| Receiver input resistance | RIN | 96 | kΩ | -7V≦VCM≦12V | 5 | ||
| Receiver output short-circuit current | IOSR | 7 | 95 | mA | 0V≦VRO≦VCC | 5 | |
| Supply current, no load | Icc | 530 | 900 | μA | 无负载， RE=VCC, DI=GND或VCC, DE=VCC | 6 | |
| Supply current, no load | Icc | 475 | 600 | μA | DE=GND | 6 | |
| Supply current, no load | Icc | 530 | 1000 | μA | 无负载 RE=GND, DI=GND或VCC, DE=VCC | 6 | |
| Supply current, no load | Icc | 475 | 800 | μA | DE=GND | 6 | |
| Standby mode supply current | ISHDN | 0.05 | 10 | μA | DE=GND, RE=VCC | 6 | |
| ESD IEC61000-4-2 air-gap discharge (RS-485 pins) | -16 | 16 | kV | IEC61000-4-2 air-gap, RS-485 pins (A, B) | 6 | ||
| ESD IEC61000-4-2 contact discharge, half duplex (RS-485 pins) | -16 | 16 | kV | IEC61000-4-2 contact, half duplex | 6 | ||
| ESD HBM pin to ground (RS-485 pins) | -16 | 16 | kV | HBM, RS-485 pins to GND | 6 | ||
| ESD HBM all pins | -4 | 4 | kV | HBM, JEDEC JS-001-2010 | 6 | ||
| ESD charged device model (CDM) | -500 | 500 | V | CDM, JESD22-C101E | 6 | ||
| Driver propagation delay, low to high | tDPLH | 200 | 1000 | ns | 图2和5，RL=54Ω，CL=50pF | 8 | |
| Driver propagation delay, high to low | tDPHL | 200 | 1000 | ns | 图2和5，RL=54Ω，CL=50pF | 8 | |
| Driver output skew | tDSKEW | -140 | 140 | ns | 图2和5，RL=54Ω，CL=50pF | 8 | |
| Driver rise and fall time | tDR, tDF | 250 | 900 | ns | 图2和5，RL=54Ω，CL=50pF | 8 | |
| Driver enable to output high | tDZH | 2500 | ns | 图3和6，CL=100pF，S3闭合 | 8 | ||
| Driver enable to output low | tDZL | 2500 | ns | 图3和6，CL=100pF，S2闭合 | 8 | ||
| Driver disable time from low | tDLZ | 100 | ns | 图3和6，CL=15pF，S2闭合 | 8 | ||
| Driver disable time from high | tDHZ | 100 | ns | 图3和6，CL=15pF，S3闭合 | 8 | ||
| Driver enable from standby to output high | tDZH(SHDN) | 5500 | ns | 图3和6，CL=15pF，S3闭合 | 8 | ||
| Driver enable from standby to output low | tDZL(SHDN) | 5500 | ns | 图3和6，CL=15pF，S2闭合 | 8 | ||
| Driver standby time | tSHDN | 50 | 700 | ns | 8 | ||
| Receiver propagation delay | tRPLH, tRPHL | 200 | ns | 图7和8，CL=15pF，/VID/≥2.0V，VID≤15ns | 8 | ||
| Receiver differential output skew | tRSKEW | -30 | 30 | ns | 图7和8，CL=15pF，/VID/≥2.0V，VID≤15ns | 8 | |
| Receiver enable to output low | tRZL | 50 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 | ||
| Receiver enable to output high | tRZH | 50 | ns | 图4和9，S1=+1.5V，S2接GND | 8 | ||
| Receiver disable time from low | tRLZ | 50 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 | ||
| Receiver disable time from high | tRHZ | 50 | ns | 图4和9，S1=+1.5V，S2接GND | 8 | ||
| Receiver enable from standby to output high | tRZH(SHDN) | 5500 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 | ||
| Receiver enable from standby to output low | tRZL(SHDN) | 5500 | ns | 图4和9，S1=+1.5V，S2接GND | 8 | ||
| Receiver standby time | tSHDN | 50 | 700 | ns | 8 | ||
| Supply voltage (absolute maximum) | VCC | 6 | V | 4 | |||
| Control input voltage (absolute maximum) | RE, DE | -0.3 | 6 | V | 4 | ||
| Driver input voltage (absolute maximum) | DI | -0.3 | 6 | V | 4 | ||
| Driver output voltage (absolute maximum, A, B) | A,B | -7 | 12 | V | 4 | ||
| Receiver input voltage (absolute maximum, A, B) | A,B | -7 | 12 | V | 4 | ||
| Receiver output voltage (absolute maximum) | RO | -0.3 | V | 4 | |||
| Storage temperature | -65 | 150 | ℃ | 4 | |||
| Lead temperature (soldering) | TLEAD | 260 | ℃ | soldering 10 s | 4 | ||
| Operating temperature range (commercial, EC grade) | 0 | 70 | ℃ | MAX308_EC grade | 4 |
CAD (KiCad official)
- Symbol:
MAX3085ECMM - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
max3085ecmm-etched.step/max3085ecmm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max3085ecmm.step/max3085ecmm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (28 pp, sha256
a74bdc964ee9cb50, retrieved 2026-10-18, 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).
# MAX3085ECMM
**HGSEMI** · RS-485 / RS-422 ICs · MSOP-8
MAX3085ECMM from HGSEMI, in a MSOP-8. 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: driven high when RE is low and A−B is ≥ −50 mV, and driven low when A−B is ≤ −200 mV; high-impedance when RE is high. |
| 2 | ~{RE} | input | Receiver output enable, active low: RO is enabled when RE is low and goes high-impedance when RE is high; RE high with DE low puts the device into low-power shutdown. |
| 3 | DE | input | Driver output enable: the driver outputs are active when DE is high and high-impedance when DE is low; DE low with RE high puts the device into low-power shutdown. |
| 4 | DI | input | Driver input: when DE is high, a low on DI drives A/Y low and B/Z high, and a high on DI drives A/Y high and B/Z low. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Bus pin A: non-inverting receiver input and non-inverting driver output (A/Y), intended for connection to the RS-485/RS-422 bus. |
| 7 | B | bidirectional | Bus pin B: inverting receiver input and inverting driver output (B/Z), intended for connection to the RS-485/RS-422 bus. |
| 8 | VCC | power_in | Positive supply, 4.5 V to 5.5 V; the datasheet recommends a 0.1 µF capacitor to ground. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | MSOP-8 |
| 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 | 4.5 | | 5.5 | V | | 5 |
| Differential driver output voltage (RS-422 load) | VOD | 2.7 | | | V | 图1，RL=100Ω（RS-422） | 5 |
| Differential driver output voltage (RS-485 load) | VOD | 2.1 | | | V | 图1，RL=54Ω（RS-485） | 5 |
| Change in differential driver output voltage magnitude | ΔVOD | | | 0.2 | V | 图1，RL=100Ω 或 RL=54Ω | 5 |
| Driver common-mode output voltage | VOC | | | 3 | V | 图1，RL=100Ω 或 RL=54Ω | 5 |
| Change in common-mode output voltage magnitude | ΔVOC | | | 0.2 | V | 图1，RL=100Ω 或 RL=54Ω | 5 |
| Input high voltage (DE, DI, RE) | VIH | 2 | | | V | | 5 |
| Input low voltage (DE, DI, RE) | VIL | | | 0.8 | V | | 5 |
| Input current (DE, DI, RE) | IIN | -1 | | 1 | μA | | 5 |
| Input current (A, B) full duplex, max | IA, IB | | | 125 | μA | DE=GND, VCC=GND或VCC, VIN=12V | 5 |
| Input current (A, B) full duplex, min | IA, IB | -75 | | | μA | DE=GND, VCC=GND或VCC, VIN=-7V | 5 |
| Driver short-circuit output current, max | IOSD | | | 250 | mA | 0≦VOUT≦12V | 5 |
| Driver short-circuit output current, min | IOSD | -250 | | | mA | -7≦VOUT≦VCC | 5 |
| Driver foldback short-circuit current, max | IOSDF | | | 20 | mA | Vcc-1V≦VOUT≦Vcc+0.5V | 5 |
| Driver foldback short-circuit current, min | IOSDF | -20 | | | mA | -0.5V≦VOUT≦+1V | 5 |
| Receiver differential threshold voltage | VTH | -200 | -125 | -50 | mV | -7V≦VCM≦12V | 5 |
| Receiver output low voltage | VOL | | | 0.4 | V | IO= 4mA，VID=-200mV | 5 |
| Receiver three-state output current | IOZR | -1 | | 1 | μA | 0≦VO≦VCC | 5 |
| Receiver input resistance | RIN | 96 | | | kΩ | -7V≦VCM≦12V | 5 |
| Receiver output short-circuit current | IOSR | 7 | | 95 | mA | 0V≦VRO≦VCC | 5 |
| Supply current, no load | Icc | | 530 | 900 | μA | 无负载， RE=VCC, DI=GND或VCC, DE=VCC | 6 |
| Supply current, no load | Icc | | 475 | 600 | μA | DE=GND | 6 |
| Supply current, no load | Icc | | 530 | 1000 | μA | 无负载 RE=GND, DI=GND或VCC, DE=VCC | 6 |
| Supply current, no load | Icc | | 475 | 800 | μA | DE=GND | 6 |
| Standby mode supply current | ISHDN | | 0.05 | 10 | μA | DE=GND, RE=VCC | 6 |
| ESD IEC61000-4-2 air-gap discharge (RS-485 pins) | | -16 | | 16 | kV | IEC61000-4-2 air-gap, RS-485 pins (A, B) | 6 |
| ESD IEC61000-4-2 contact discharge, half duplex (RS-485 pins) | | -16 | | 16 | kV | IEC61000-4-2 contact, half duplex | 6 |
| ESD HBM pin to ground (RS-485 pins) | | -16 | | 16 | kV | HBM, RS-485 pins to GND | 6 |
| ESD HBM all pins | | -4 | | 4 | kV | HBM, JEDEC JS-001-2010 | 6 |
| ESD charged device model (CDM) | | -500 | | 500 | V | CDM, JESD22-C101E | 6 |
| Driver propagation delay, low to high | tDPLH | 200 | | 1000 | ns | 图2和5，RL=54Ω，CL=50pF | 8 |
| Driver propagation delay, high to low | tDPHL | 200 | | 1000 | ns | 图2和5，RL=54Ω，CL=50pF | 8 |
| Driver output skew | tDSKEW | -140 | | 140 | ns | 图2和5，RL=54Ω，CL=50pF | 8 |
| Driver rise and fall time | tDR, tDF | 250 | | 900 | ns | 图2和5，RL=54Ω，CL=50pF | 8 |
| Driver enable to output high | tDZH | | | 2500 | ns | 图3和6，CL=100pF，S3闭合 | 8 |
| Driver enable to output low | tDZL | | | 2500 | ns | 图3和6，CL=100pF，S2闭合 | 8 |
| Driver disable time from low | tDLZ | | | 100 | ns | 图3和6，CL=15pF，S2闭合 | 8 |
| Driver disable time from high | tDHZ | | | 100 | ns | 图3和6，CL=15pF，S3闭合 | 8 |
| Driver enable from standby to output high | tDZH(SHDN) | | | 5500 | ns | 图3和6，CL=15pF，S3闭合 | 8 |
| Driver enable from standby to output low | tDZL(SHDN) | | | 5500 | ns | 图3和6，CL=15pF，S2闭合 | 8 |
| Driver standby time | tSHDN | 50 | | 700 | ns | | 8 |
| Receiver propagation delay | tRPLH, tRPHL | | | 200 | ns | 图7和8，CL=15pF，/VID/≥2.0V，VID≤15ns | 8 |
| Receiver differential output skew | tRSKEW | -30 | | 30 | ns | 图7和8，CL=15pF，/VID/≥2.0V，VID≤15ns | 8 |
| Receiver enable to output low | tRZL | | | 50 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 |
| Receiver enable to output high | tRZH | | | 50 | ns | 图4和9，S1=+1.5V，S2接GND | 8 |
| Receiver disable time from low | tRLZ | | | 50 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 |
| Receiver disable time from high | tRHZ | | | 50 | ns | 图4和9，S1=+1.5V，S2接GND | 8 |
| Receiver enable from standby to output high | tRZH(SHDN) | | | 5500 | ns | 图4和9，S1=-1.5V，S2接VCC | 8 |
| Receiver enable from standby to output low | tRZL(SHDN) | | | 5500 | ns | 图4和9，S1=+1.5V，S2接GND | 8 |
| Receiver standby time | tSHDN | 50 | | 700 | ns | | 8 |
| Supply voltage (absolute maximum) | VCC | | | 6 | V | | 4 |
| Control input voltage (absolute maximum) | RE, DE | -0.3 | | 6 | V | | 4 |
| Driver input voltage (absolute maximum) | DI | -0.3 | | 6 | V | | 4 |
| Driver output voltage (absolute maximum, A, B) | A,B | -7 | | 12 | V | | 4 |
| Receiver input voltage (absolute maximum, A, B) | A,B | -7 | | 12 | V | | 4 |
| Receiver output voltage (absolute maximum) | RO | -0.3 | | | V | | 4 |
| Storage temperature | | -65 | | 150 | ℃ | | 4 |
| Lead temperature (soldering) | TLEAD | | | 260 | ℃ | soldering 10 s | 4 |
| Operating temperature range (commercial, EC grade) | | 0 | | 70 | ℃ | MAX308_EC grade | 4 |
## CAD (KiCad official)
- Symbol: `MAX3085ECMM`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `max3085ecmm-etched.step` / `max3085ecmm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max3085ecmm.step` / `max3085ecmm.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8770707254914375680) (28 pp, sha256 `a74bdc964ee9cb50`, retrieved 2026-10-18, 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/max3085ecmm-datasheet.pdf)