SN65LBC184DR 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	R	output	Receiver output. Drives a logic-level representation of the differential bus (A-B): H when VID >= 0.2 V, L when VID <= -0.2 V, high-impedance when /RE is high. Fail-safe high output when bus inputs are open.
2	/RE	input	Receiver output enable, active low. When low the receiver R is enabled; when high R is placed in high-impedance state.
3	DE	input	Driver output enable, active high. When high the differential driver outputs A and B are enabled; when low they are placed in high-impedance state.
4	D	input	Driver data input. When DE is high, a logic H on D drives A high and B low; a logic L on D drives A low and B high. Ignored when DE is low.
5	GND	power_in	Device ground reference. All voltage measurements (except differential bus voltage) are referenced to this pin.
6	A	bidirectional	Non-inverting differential bus I/O. Driver non-inverting output and receiver non-inverting input, with integrated transient voltage suppression (400-W surge, +/-15 V continuous common-mode range) and 1/4 unit-load input impedance.
7	B	bidirectional	Inverting differential bus I/O. Driver inverting output and receiver inverting input, with integrated transient voltage suppression (400-W surge, +/-15 V continuous common-mode range) and 1/4 unit-load input impedance.
8	VCC	power_in	Supply voltage input, +5 V nominal (absolute maximum -0.5 V to 7 V). Disabled supply current is 300 uA max.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN65LBC184DRD
SN65LBC184DR
SN65LBC184DRP

CAD (KiCad official)

Symbol: SN65LBC184DR
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
`sn65lbc184dr.step`	122 KB	You want the bare part, or you mark your own boards.
`sn65lbc184dr-etched.step`	2.6 MB	You want the part with `SN65LBC184DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 631 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 (23 pp, sha256 53d77bcd7a987620, 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