SN65HVD30DR from Texas Instruments, in a SOIC-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	VCC	power_in	Supply pin, 3.0 V to 3.6 V nominal. Bypass locally with a 100 nF ceramic capacitor to GND.
2	R	output	Receiver data output. CMOS logic-level output that reflects the differential state of the A/B bus inputs.
3	D	input	Driver data input. CMOS logic-level input; drives the differential Y/Z bus outputs.
4	GND	power_in	Local device ground / reference potential for all logic and supply pins.
5	Y	output	Driver non-inverting differential bus output (complementary to Z). Together with Z forms the RS-485/RS-422 driver output pair; terminate with a matched termination resistor at the far end.
6	Z	output	Driver inverting differential bus output (complementary to Y). Full-duplex driver output pair with Y.
7	B	input	Receiver inverting differential bus input (complementary to A). Receives the far-end RS-485/RS-422 differential signal in full-duplex mode.
8	A	input	Receiver non-inverting differential bus input (complementary to B). Full-duplex receiver input pair with B.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN65HVD30DR
SN65HVD30DRD
SN65HVD30DRRHLR
SN65HVD30DRRHLT

CAD (KiCad official)

Symbol: SN65HVD30DR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn65hvd30dr.step`	122 KB	You want the bare part, or you mark your own boards.
`sn65hvd30dr-etched.step`	2.4 MB	You want the part with `SN65HVD30DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 588 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: Texas Instruments datasheet (47 pp, sha256 4f90059e9caf3d07, retrieved 2026-08-17, tier: manufacturer)
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