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MAX490ESA

Public Made by Adom

by adom

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

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MAX490ESA

XBLW · RS-485 / RS-422 ICs · SOP-8

MAX490ESA from XBLW, 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 VCC power_in Positive supply pin; the datasheet specifies 3.0 V ≦ VCC ≦ 5.5 V (absolute maximum 7 V).
2 RO output Receiver output: goes high when A-B ≥ -50 mV and low when A-B ≤ -200 mV, and is held high when the receiver input is open or shorted.
3 DI input Driver input: a low level forces Y low and Z high, and a high level forces Y high and Z low; absolute range is -0.3 V to VCC+0.3 V.
4 GND power_in Ground reference pin for the device.
5 Y output Driver non-inverting output that follows DI; the driver output voltage range is limited to -8 V to +13 V per the absolute maximum ratings.
6 Z output Driver inverting output, complementary to Y; the driver output voltage range is limited to -8 V to +13 V per the absolute maximum ratings.
7 B input Receiver inverting input; the receiver input voltage range is -8 V to +13 V with a nominal input impedance of 96 kΩ.
8 A input Receiver non-inverting input; the receiver input voltage range is -8 V to +13 V with a nominal input impedance of 96 kΩ.

Key specifications

Parameter Value
Manufacturer XBLW
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 3 5.5 V 4
Differential driver output (no load) VOD1 1.5 5 V Figure 4 4
Differential driver output (RS-422) VOD2 2 5 V Figure 4, R=50Ω (RS-422) 4
Differential driver output (RS-485) VOD2 1.5 5 V Figure 4, R=27Ω (RS-485) 4
Amplitude change in differential output voltage ∆VOD 0.2 V Figure 4, R=50Ω or R=27Ω 4
Drive common mode output voltage VOC 1 3 V Figure 4, R=50Ω or R=27Ω 4
Amplitude change in common mode voltage ∆VOC 0.2 V Figure 4, R=50Ω or R=27Ω 4
Input high voltage DE, DI, /RE VIH1 2 V 4
Input low voltage DE, DI, /RE VIL1 0.8 V 4
DI input lag VHYS 100 mV 4
Input current (A,B) full duplex IIN4 125 µA DE=GND, VCC=GND or VIN=12V 4
Receiver differential threshold voltage VTH -200 -110 -50 mV -7V≦VCM≦12V 4
Receiver input lag ΔVTH 30 mV 4
Receiver output low voltage VOL 0.4 V IO=4mA, VID=-200mV 4
Three state output current at receiver end IOZR -1 1 µA 0.4V≦VO≦2.4V 4
Receiver input impedance RIN 96 KΩ -7V≦VCM≦12V 4
Supply current (static working current) ICC 270 600 µA No load, DI=0 or VCC 4
ESD electrostatic protection (HBM) ESD HBM 3000 V 4
Drive input to output (high) TDPLH 250 720 900 ns Figures 5 and 6, RDIFF=54Ω, CL1=CL2=100p 5
Drive input to output (low) TDPHL 250 720 900 ns Figures 5 and 6, RDIFF=54Ω, CL1=CL2=100p 5
Drive output skew /tDPLH - tDPHL/ TDHKEW -100 -3 100 ns Figures 5 and 6, RDIFF=54Ω, CL1=CL2=100p 5
Drive up or down time tDR, tDF 200 530 750 ns Figures 5 and 6, RDIFF=54Ω, CL1=CL2=100p 5
Maximum data rate FMAX 2.5 M 5
Receiver input to output (low to high) TRPLH 127 200 ns Figures 7 and 8, /VID/ ≥ 2.0V, rise and fall times ≤ 15 ns 5
Receiver input to output (high to low) TRPHL 127 200 ns Figures 7 and 8, /VID/ ≥ 2.0V, rise and fall times ≤ 15 ns 5
Differential receiver skew /tDPLH - tDPHL/ TRSKD -30 3 30 ns Figures 7 and 8, /VID/ ≥ 2.0V, rise and fall times ≤ 15 ns 5
Supply voltage (absolute maximum) VCC 7 V 3
Drive input voltage DI -0.3 V 3
Receiver output voltage RO -0.3 V 3
Continuous power consumption 471 mW SOP-8 package 3
Storage temperature -65 150 ℃ 3
Soldering temperature 245 ℃ 10 s 3

CAD (KiCad official)

  • Symbol: MAX490ESA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: max490esa-etched.step / max490esa-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max490esa.step / max490esa.glb are the bare package body.

Provenance

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

  • Datasheet: XBLW datasheet (10 pp, sha256 a5821d8ad0c2488e, retrieved 2026-10-17, tier: lcsc)
  • 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