XL3485 from XINLUDA, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	RO	output	Receiver output. When /RE is low: if (A-B) >= 200 mV, RO is high; if (A-B) <= -200 mV, RO is low. High-impedance when the receiver is disabled (/RE high).
2	/RE	input	Active-low receiver output enable. When /RE is low the receiver output RO is active; when /RE is high the receiver output is high-impedance. When /RE is high and DE is low, the device enters low-power shutdown mode.
3	DE	input	Driver output enable. Driver outputs A/B are active when DE is high and high-impedance when DE is low. When /RE is high and DE is low, the device enters low-power shutdown mode.
4	DI	input	Driver data input. With DE high, a logic low on DI drives A low and B high; a logic high on DI drives A high and B low. Logic thresholds VIH >= 2.0 V, VIL <= 0.8 V.
5	GND	power_in	Ground reference for the device. All voltages are referenced to this pin.
6	A	bidirectional	RS-485 non-inverting bus I/O. Receiver in-phase input and driver in-phase output. Bus-side voltage range -7 V to +13 V; receiver input resistance ~96 kΩ (1/8 unit load).
7	B	bidirectional	RS-485 inverting bus I/O. Receiver inverting input and driver inverting output. Bus-side voltage range -7 V to +13 V; receiver input resistance ~96 kΩ (1/8 unit load).
8	VCC	power_in	Positive supply, 3.0 V to 3.6 V (3.3 V nominal). Absolute maximum +7 V. Typical supply current 520 uA (receive) / 540 uA (transmit); shutdown current 0.5 uA typical.

Key specifications

Parameter	Value
Manufacturer	XINLUDA
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

XL3485
XL3485XD3485

CAD (KiCad official)

Symbol: XL3485
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`xl3485.step`	122 KB	You want the bare part, or you mark your own boards.
`xl3485-etched.step`	1.5 MB	You want the part with `XL3485` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 382 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: XINLUDA datasheet (14 pp, sha256 19e1b70d8514813f, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF