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MAX485ESA-MS

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MSKSEMI RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX485ESA-MS

MSKSEMI · RS-485 / RS-422 ICs · SOP-8

MAX485ESA-MS from MSKSEMI, in a SOP-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: with /RE low, RO goes high when A-B is at or above -50 mV and goes low when A-B is at or below -200 mV.
2 /RE input Active-low receiver output enable: high disables the receiver output (RO high-impedance), and /RE high with DE low puts the device into low-power shutdown.
3 DE input Active-high driver output enable: low puts the driver outputs in high-impedance, and /RE high with DE low puts the device into low-power shutdown.
4 DI input Driver input: with DE high, a low on DI drives A low and B high, and a high on DI drives A high and B low.
5 GND power_in Ground pin; all voltages in the datasheet are referenced to this ground.
6 A bidirectional Non-inverting receiver input and driver output on the bus, rated for bus voltages from -7 V to 13 V.
7 B bidirectional Inverting receiver input and driver output on the bus, rated for bus voltages from -7 V to 13 V.
8 VCC power_in Supply pin for 4.75 V to 5.25 V operation (5 V ±5%), with an absolute maximum of 7 V.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOP-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
Power supply voltage VCC 7 V 3
Control port input voltage (/RE, DE, DI) /RE, DE, DI -0.3 V Upper limit printed as VCC+0.3 V 3
Bus side input voltage (A, B) A, B -7 13 V 3
Receiver output voltage RO -0.3 V Upper limit printed as VCC+0.3 V 3
Operating temperature range -40 85 ℃ 3
Storage temperature range -60 150 ℃ 3
Soldering temperature 300 ℃ 3
Continuous power dissipation 400 mW SOP8 package 3
Operating supply voltage range VCC 4.75 5.25 V 2
Driver differential output voltage (no load) VOD1 5 V No load 4
Driver differential output voltage (RL=27 Ω) VOD2 1.5 5 V Figure 2, RL = 27 Ω 4
Driver differential output voltage (RL=50 Ω) VOD2 2 V Figure 2, RL = 50 Ω 4
Change in magnitude of driver differential output voltage ΔVOD 0.2 V Figure 2, RL = 27 Ω 4
Driver common-mode output voltage VOC 3 V Figure 2, RL = 27 Ω 4
Change in magnitude of common-mode output voltage ΔVOC 0.2 V Figure 2, RL = 27 Ω 4
Logic input high voltage VIH 2 V DE, DI, /RE 4
Logic input low voltage VIL 0.8 V DE, DI, /RE 4
Logic input current IIN1 -2 2 uA DE, DI, /RE 4
Driver output short-circuit current, shorted to high IOSD1 35 250 mA Shorted to 0 V to 12 V 4
Driver output short-circuit current, shorted to low IOSD2 -250 -35 mA Shorted to -7 V to 0 V 4
Receiver input current (A, B) IIN2 125 uA DE = 0 V, VCC = 0 or 5 V 4
Receiver input current (A, B), negative IIN2 -100 uA DE = 0 V, VCC = 0 or 5 V 4
Positive-going receiver input threshold voltage VIT+ -50 mV -7 V≤VCM≤12 V 4
Negative-going receiver input threshold voltage VIT- -200 mV 4
Receiver input hysteresis voltage Vhys 10 30 mV -7 V≤VCM≤12 V 4
Receiver output low voltage VOL 0.4 V IOUT = +4 mA, VID = -200 mV 4
Three-state (high-impedance) receiver output leakage current IOZR -1 1 uA 0.4 V < VO < 2.4 V 5
Receiver input resistance RIN 96 kΩ -7 V≤VCM≤12 V 5
Receiver short-circuit current IOSR 7 95 mA 0 V≤VO≤VCC 5
Supply current ICC 180 500 uA /RE=0 V or VCC, DE = 0 V 5
Supply current ICC 170 400 uA /RE=VCC, DE 5
Shutdown supply current ISHDN 0.5 10 uA DE = 0 V, /RE = VCC 5
ESD protection, human body model (A, B) 15 KV A, B, human body model 5
ESD protection, contact discharge (A, B) 15 KV A, B, IEC 61000-4-2 contact discharge 5
Driver propagation delay, low to high tDPLH 1000 ns RDIFF = 54 Ω, CL1=CL2=100 pF (Figures 3 & 4) 5
Driver propagation delay, high to low tDPHL 1000 ns RDIFF = 54 Ω, CL1=CL2=100 pF (Figures 3 & 4) 5
Driver propagation delay skew tSKEW1 -100 100 ns 5
Driver rise time tDR 200 500 700 ns 5
Driver fall time tDF 200 500 700 ns 5
Driver enable to output high tDZH 2500 ns CL=100 pF, S1 closed (Figures 5, 6) 5
Driver enable to output low tDZL 2500 ns 5
Driver input low to disable tDLZ 100 ns CL=15 pF, S2 closed (Figures 5, 6) 5
Driver input high to disable tDHZ 100 ns 5
Driver enable to output high in shutdown tDZH(SHDN) 4500 ns Shutdown; CL = 15 pF, S2 closed 5
Driver enable to output low in shutdown tDZL(SHDN) 4500 ns Shutdown; CL = 15 pF, S1 closed 5
Receiver propagation delay, low to high tRPLH 127 200 ns VID≥2.0 V; rise and fall time VID≤15 ns (Figures 7 & 8) 6
Receiver propagation delay, high to low tRPHL 127 200 ns 6
Receiver propagation delay skew tSKEW2 3 30 ns Figures 7 & 8 6
Receiver enable to output low tRZL 20 50 ns CL = 100 pF, S1 closed (Figures 9, 10) 6
Receiver enable to output high tRZH 20 50 ns CL = 100 pF, S2 closed (Figures 9, 10) 6
Receiver output low to disable tRLZ 20 50 ns CL = 100 pF, S1 closed (Figures 9, 10) 6
Receiver output high to disable tRHZ 20 50 ns CL = 100 pF, S2 closed (Figures 9, 10) 6
Receiver enable to output high in shutdown tRZH(SHDN) 3500 ns Shutdown; CL = 100 pF, S2 closed (Figures 9, 10) 6
Receiver enable to output low in shutdown tRZL(SHDN) 3500 ns Shutdown; CL = 100 pF, S1 closed (Figures 9, 10) 6
Time to enter shutdown tSHDN 50 200 600 ns NOTE2: /RE=1, DE=0 duration 6

CAD (KiCad official)

  • Symbol: MAX485ESA-MS
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: max485esa-ms-etched.step / max485esa-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max485esa-ms.step / max485esa-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (13 pp, sha256 d56adab8fb135a9f, retrieved 2026-10-19, 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