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SL485N
Public Made by Adomby adom
Slkor SLKORMICRO Elec 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
markdownSL485N
Slkor SLKORMICRO Elec · RS-485 / RS-422 ICs · SOP-8
SL485N from Slkor SLKORMICRO Elec, 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; the datasheet states it drives logic high when the receiver inputs are open or shorted (fail-safe), and it is high-impedance when RE is high. RO is rated from -0.3 V to VCC+0.3 V. |
| 2 | RE | input | Receiver enable, active low; driving it high puts RO into high-impedance. Absolute control input range is -0.5 V to +6.0 V. |
| 3 | DE | input | Driver enable, active high; when low the driver outputs are high-impedance, and when high the device operates in transmit mode. Absolute control input range is -0.5 V to +6.0 V. |
| 4 | DI | input | Driver data input that sets the differential state of L1/L2 while the driver is enabled. Absolute input range is -0.5 V to +6.0 V. |
| 5 | GND | power_in | Ground reference for all device voltages; the datasheet states all voltages are referenced to ground. |
| 6 | L1 | bidirectional | Receiver input and driver output (bus line A); bus voltage range is -7 V to +12 V, with ±15 kV HBM ESD protection between L1 and L2. |
| 7 | L2 | bidirectional | Receiver input and driver output (bus line B); bus voltage range is -7 V to +12 V, with ±15 kV HBM ESD protection between L1 and L2. |
| 8 | VCC | power_in | Supply pin; absolute maximum is +6.0 V and the datasheet specifies operation at 5 V ±5%. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| 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 | VCC | 6 | V | 3 | |||
| Control input voltage (DE, RE) | -0.5 | 6 | V | 3 | |||
| Driver input voltage (DI) | -0.5 | 6 | V | 3 | |||
| Driver output voltage (L1, L2) | -7 | 12 | V | 3 | |||
| Receiver input voltage (L1, L2) | -7 | 12 | V | 3 | |||
| Receiver output voltage (RO) | -0.3 | V | 3 | ||||
| Storage temperature range | TSTG | -65 | 160 | ℃ | 3 | ||
| Operating temperature range | TOP | -40 | 85 | ℃ | 3 | ||
| Continuous power dissipation, 8-pin plastic SOP | 470 | mW | Above +70℃ | 3 | |||
| Soldering temperature | 300 | ℃ | 10 s | 3 | |||
| Driver differential output, no load | VOD1 | 5 | V | 4 | |||
| Driver differential output, loaded | VOD2 | 2 | 3 | V | Fig 1, R=50Ω or R=27Ω | 4 | |
| Change in magnitude of driver differential output voltage | ΔVOD | 0.2 | V | 4 | |||
| Driver common-mode output voltage | VOC | 3 | V | 4 | |||
| Change in magnitude of driver common-mode output voltage | ΔVOC | 0.2 | V | 4 | |||
| Input high voltage | VIH | 2 | V | DE, RE, DI | 4 | ||
| Input low voltage | VIL | 0.8 | V | DE, RE, DI | 4 | ||
| Input current | IIN1 | -2 | 2 | uA | DE, RE, DI | 4 | |
| Input current (L1, L2) | IIN2 | 40 | 90 | uA | DE=0V, Vcc=5V, VIN=5V | 4 | |
| Input current (L1, L2) | IIN2 | 60 | 100 | uA | DE=0V, Vcc=5V, VIN=0V | 4 | |
| Receiver differential input threshold voltage | VTH | -100 | 100 | mV | -7V ≤ VCM ≤ +12V | 4 | |
| Receiver output low voltage | VOL | 0.4 | V | IO=4mA | 4 | ||
| Receiver tri-state (high-impedance) output current | IOZR | -1 | 1 | uA | 0.4V ≤ Vo ≤ 2.4V | 4 | |
| Receiver input impedance | RIN | 96 | kΩ | -7V ≤ VCM ≤ +12V | 4 | ||
| No-load supply current | ICC | 480 | 800 | uA | No load, RE=DI=GND or Vcc, DE=Vcc | 4 | |
| No-load supply current | ICC | 450 | 700 | uA | DE=GND | 4 | |
| Receiver output short-circuit current | IOSR | -80 | 80 | mA | 0V ≤ VRO ≤ VCC | 4 | |
| ESD protection, L1 to L2, human body model | -15 | 15 | kV | Between L1 and L2, human body model | 4 | ||
| Driver input to output propagation delay (low-to-high) | tDPLH | 250 | 1000 | nS | Fig 3 and 5, RDIFF=50Ω, CL1=CL2=100pF | 5 | |
| Driver input to output propagation delay (high-to-low) | tDPHL | 250 | 1000 | nS | 5 | ||
| Driver output skew /tDPLH - tDPHL/ | tDSKEW | -100 | -3 | 100 | nS | 5 | |
| Driver rise time | tDR | 200 | 750 | nS | 5 | ||
| Driver fall time | tDF | 200 | 750 | nS | 5 | ||
| Driver enable to output high | tDZH | 2500 | nS | Fig 4 and 6, CL=100pF, S2 closed | 5 | ||
| Driver enable to output low | tDZL | 2500 | nS | Fig 4 and 6, CL=100pF, S1 closed | 5 | ||
| Driver disable from low | tDLZ | 100 | nS | Fig 4 and 6, CL=15pF, S1 closed | 5 | ||
| Driver disable from high | tDHZ | 100 | nS | Fig 4 and 6, CL=15pF, S2 closed | 5 | ||
| Receiver input to output propagation delay (low-to-high) | tRPLH | 200 | nS | Fig 7 and 9, /VID/ ≥ 2.0V; VID rise/fall time ≤15nS | 5 | ||
| Receiver input to output propagation delay (high-to-low) | tRPHL | 200 | nS | 5 | |||
| Differential receiver skew /tRPLH - tRPHL/ | tRSKEW | -30 | 3 | 30 | nS | 5 | |
| Receiver enable to output low | tRZL | 20 | 50 | nS | Fig 2 and 8, CL=100pF, S1 closed | 5 | |
| Receiver enable to output high | tRZH | 20 | 50 | nS | Fig 2 and 8, CL=100pF, S2 closed | 5 | |
| Receiver disable from low | tRLZ | 20 | 50 | nS | Fig 2 and 8, CL=100pF, S1 closed | 5 | |
| Receiver disable from high | tRHZ | 20 | 50 | nS | Fig 2 and 8, CL=100pF, S2 closed | 5 | |
| Polarity switch flip wait time | Ts | 45 | 65 | 80 | ms | DE=RE=0, RO low | 5 |
CAD (KiCad official)
- Symbol:
SL485N - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
sl485n-etched.step/sl485n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sl485n.step/sl485n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Slkor SLKORMICRO Elec datasheet (10 pp, sha256
ef9225825518ead9, 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).