SP485EN from UMW, 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. Logic-level output of the differential receiver. When RE is low and (A-B) > +0.2V, RO=1; when (A-B) < -0.2V, RO=0. VOH >= 3.5V at IO=-4mA; VOL <= 0.4V at IO=4mA. Enters high-impedance state when RE is high.
2	RE	input	Receiver Output Enable (active-low). When RE=0, the receiver output RO is enabled; when RE=1, RO is placed in a high-impedance (tri-state) condition. VIH >= 2V, VIL <= 0.8V, input current +/-2 uA max.
3	DE	input	Driver Output Enable (active-high). When DE=1, the differential driver outputs A and B are enabled; when DE=0, both A and B are placed in a high-impedance state. VIH >= 2V, VIL <= 0.8V.
4	DI	input	Driver Input. Logic-level input that drives the differential bus outputs. When DE=1 and DI=1, A=1 and B=0; when DE=1 and DI=0, A=0 and B=1. VIH >= 2V, VIL <= 0.8V, input current +/-2 uA max.
5	GND	power_in	Ground reference (0V) for both the logic and the differential bus interface.
6	A	bidirectional	Non-inverting driver output / non-inverting receiver input (RS-485/RS-422 bus line A). Withstands -7V to +13V common-mode. Receiver threshold VTH = -0.2V to +0.2V (differential A-B). Input resistance >= 12 kOhm. Driver differential output >= 1.5V into a 27 Ohm load.
7	B	bidirectional	Inverting driver output / inverting receiver input (RS-485/RS-422 bus line B). Withstands -7V to +13V common-mode. Complementary to line A. Input resistance >= 12 kOhm.
8	VCC	power_in	Positive supply input. Single 5V supply (4.75V to 5.25V, +/-5%). Absolute maximum 7V. Quiescent supply current typically 900 uA (max).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SP485EN

CAD (KiCad official)

Symbol: SP485EN
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
`sp485en.step`	122 KB	You want the bare part, or you mark your own boards.
`sp485en-etched.step`	1.7 MB	You want the part with `SP485EN` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 424 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: UMW datasheet (9 pp, sha256 ff31376d6581230b, 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