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MAX3085ECMM

Public Made by Adom

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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.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 (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