THVD1500DR 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	R	output	Receive data output. Digital output driven from the differential bus receiver comparing A vs. B.
2	/RE	input	Receiver enable, active low. Internal ~2-MΩ pull-up; drive low to enable the receiver output on R.
3	DE	input	Driver enable, active high. Internal ~2-MΩ pull-down; drive high to enable the differential bus driver onto A/B.
4	D	input	Driver data input. Digital input carrying the TX data driven onto the A/B differential bus when DE is high.
5	GND	power_in	Local device ground reference (0 V).
6	A	bidirectional	RS-485/RS-422 differential bus I/O, non-inverting (complementary to B). Tolerates -18 V to 18 V absolute-max bus voltage and ±8-kV IEC contact discharge ESD.
7	B	bidirectional	RS-485/RS-422 differential bus I/O, inverting (complementary to A). Tolerates -18 V to 18 V absolute-max bus voltage and ±8-kV IEC contact discharge ESD.
8	VCC	power_in	Supply pin, 4.5 V to 5.5 V (5-V nominal). Bypass to GND with a low-ESR ceramic close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

THVD1500DR
THVD1500DRD

CAD (KiCad official)

Symbol: THVD1500DR
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
`thvd1500dr.step`	122 KB	You want the bare part, or you mark your own boards.
`thvd1500dr-etched.step`	1.9 MB	You want the part with `THVD1500DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 490 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 (30 pp, sha256 a98b9643636e84e8, 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