component
SP485EN-MS
Public Made by Adomby adom
MSKSEMI RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSP485EN-MS
MSKSEMI · RS-485 / RS-422 ICs · SOP-8
SP485EN-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: when /RE is low, RO is high if A-B ≥ -50 mV and low if A-B ≤ -200 mV. |
| 2 | /RE | input | Receiver output enable, active low: high disables the receiver output (RO high-impedance), and /RE high with DE low puts the device into low-power shutdown. |
| 3 | DE | input | Driver output enable, active high: low forces the driver outputs to high-impedance, and /RE high with DE low puts the device into low-power shutdown. |
| 4 | DI | input | Driver input: when DE is 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 reference; all voltages in the datasheet are referenced to this pin. |
| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output; bus-side input voltage is rated -7 V to 13 V. |
| 7 | B | bidirectional | Inverting receiver input and inverting driver output; bus-side input voltage is rated -7 V to 13 V. |
| 8 | VCC | power_in | Supply pin: operating supply range is 4.75 V to 5.25 V, 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage (absolute maximum) | VCC | 7 | V | 3 | |||
| Control port voltage /RE, DE, DI (max VCC+0.3 V) | -0.3 | V | 3 | ||||
| Bus-side input voltage A, B | -7 | 13 | V | 3 | |||
| Receiver output voltage RO (max VCC+0.3 V) | -0.3 | V | 3 | ||||
| Operating temperature range | -40 | 85 | °C | 3 | |||
| Storage temperature range | -60 | 150 | °C | 3 | |||
| Soldering temperature | 300 | °C | 3 | ||||
| Continuous power dissipation, SOP8 | 400 | mW | 3 | ||||
| Supply voltage operating range | VCC | 4.75 | 5.25 | V | 2 | ||
| Driver differential output, no load | VOD1 | 5 | V | No load | 4 | ||
| Driver differential output, RL=27 Ω | VOD2 | 1.5 | 5 | V | Fig 2, RL = 27 Ω | 4 | |
| Driver differential output, RL=50 Ω | VOD2 | 2 | V | Fig 2, RL = 50 Ω | 4 | ||
| Change in differential output magnitude | ΔVOD | 0.2 | V | Fig 2, RL = 27 Ω | 4 | ||
| Driver common-mode output voltage | VOC | 3 | V | Fig 2, RL = 27 Ω | 4 | ||
| Change in common-mode output magnitude | ΔVOC | 0.2 | V | Fig 2, RL = 27 Ω | 4 | ||
| High-level input voltage | VIH | 2 | V | DE, DI, /RE | 4 | ||
| Low-level input voltage | VIL | 0.8 | V | DE, DI, /RE | 4 | ||
| Logic input current | IIN1 | -2 | 2 | µA | DE, DI, /RE | 4 | |
| Driver output short-circuit current, short to high | IOSD1 | 35 | 250 | mA | Short to 0 V to 12 V | 4 | |
| Driver output short-circuit current, short to low | IOSD2 | -250 | -35 | mA | Short to -7 V to 0 V | 4 | |
| Receiver input current (A, B), max | IIN2 | 125 | µA | DE = 0 V, VCC = 0 or 5 V | 4 | ||
| Receiver input current (A, B), min | IIN2 | -100 | µA | DE = 0 V, VCC = 0 or 5 V | 4 | ||
| Positive-going input threshold voltage | VIT+ | -50 | mV | -7 V≤VCM≤12 V | 4 | ||
| Negative-going input threshold voltage | VIT- | -200 | mV | 4 | |||
| Input hysteresis voltage | Vhys | 10 | 30 | mV | -7 V≤VCM≤12 V | 4 | |
| Low-level output voltage | VOL | 0.4 | V | IOUT = +4 mA, VID = -200 mV | 4 | ||
| Three-state input leakage current | IOZR | -1 | 1 | µA | 0.4 V < VO < 2.4 V | 5 | |
| Receiver input resistance | RIN | 96 | kΩ | -7 V≤VCM≤12 V | 5 | ||
| Receiver short-circuit current (magnitude) | IOSR | 7 | 95 | mA | 0 V≤VO≤VCC | 5 | |
| Supply current, receiver/driver enabled | ICC | 180 | 500 | µA | /RE=0 V or VCC, DE = 0 V | 5 | |
| Supply current, /RE=VCC | ICC | 170 | 400 | µA | /RE=VCC | 5 | |
| Shutdown supply current | ISHDN | 0.5 | 10 | µA | DE =0 V, /RE= VCC | 5 | |
| ESD HBM, A and B | 15 | kV | A, B; human body model | 5 | |||
| ESD contact discharge, A and B | 15 | kV | A, B; contact discharge | 5 | |||
| Driver propagation delay, low-to-high and high-to-low | tDPLH, tDPHL | 1000 | ns | RDIFF = 54 Ω, CL1=CL2=100 pF (Fig 3, 4) | 5 | ||
| Driver propagation delay skew | tSKEW1 | -100 | 100 | ns | 5 | ||
| Driver rise and fall time | tDR, tDF | 200 | 500 | 700 | ns | 5 | |
| Driver enable to output high/low | tDZH, tDZL | 2500 | ns | CL = 100 pF, S1 closed (Fig 5, 6) | 5 | ||
| Driver input low/high to disable | tDLZ, tDHZ | 100 | ns | CL = 15 pF, S2 closed (Fig 5, 6) | 5 | ||
| Driver enable to output high in shutdown | tDZH(SHDN) | 4500 | ns | CL = 15 pF, S2 closed | 5 | ||
| Driver enable to output low in shutdown | tDZL(SHDN) | 4500 | ns | CL = 15 pF, S1 closed | 5 | ||
| Receiver propagation delay, low-to-high and high-to-low | tRPLH, tRPHL | 127 | 200 | ns | VID≥2.0 V; rise and fall time VID≤15 ns (Fig 7, 8) | 6 | |
| Receiver propagation delay skew | tSKEW2 | 3 | 30 | ns | Fig 7, 8 | 6 | |
| Receiver enable to output low, output high to disable | tRZL, tRLZ | 20 | 50 | ns | CL = 100 pF, S1 closed (Fig 9, 10) | 6 | |
| Receiver enable to output high, output low to disable | tRZH, tRHZ | 20 | 50 | ns | CL = 100 pF, S2 closed (Fig 9, 10) | 6 | |
| Receiver enable to output high in shutdown | tRZH(SHDN) | 3500 | ns | CL = 100 pF, S2 closed (Fig 9, 10) | 6 | ||
| Receiver enable to output low in shutdown | tRZL(SHDN) | 3500 | ns | CL = 100 pF, S1 closed (Fig 9, 10) | 6 | ||
| Time to enter shutdown | tSHDN | 50 | 200 | 600 | ns | NOTE2 (/RE=1, DE=0 duration) | 6 |
| Driver over-temperature shutdown hysteresis | 20 | °C | 5 |
CAD (KiCad official)
- Symbol:
SP485EN-MS - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
sp485en-ms-etched.step/sp485en-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sp485en-ms.step/sp485en-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (13 pp, sha256
6a312ca51fc5ae87, 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).