SN65HVD72DR 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. CMOS-level output derived from the differential (A-B) bus voltage, drives 3.3-V logic. Output current rated ±8 mA.
2	RE	input	Active-low receiver enable. Drive low to enable the receiver output R; drive high to place R in high-impedance. 5-V tolerant logic input compatible with 3.3-V or 5-V controllers.
3	DE	input	Active-high driver enable. Drive high to enable the differential driver on A/B; drive low to place A/B in high-impedance (bus release). 5-V tolerant logic input.
4	D	input	Driver data input. Logic level driven onto the differential bus (A high / B low when D is high) when DE is asserted. 5-V tolerant CMOS input.
5	GND	power_in	Local device ground / reference potential.
6	A	bidirectional	Non-inverting differential bus I/O (RS-485 A line). Driver output or receiver input, complementary to B. Bus voltage rated −13 V to +16.5 V absmax; input range −7 V to +12 V recommended; withstands ±12 kV IEC contact discharge.
7	B	bidirectional	Inverting differential bus I/O (RS-485 B line). Driver output or receiver input, complementary to A. Same absmax/ESD ratings as A.
8	VCC	power_in	Supply voltage input. Recommended 3.0 V to 3.6 V (nominal 3.3 V). ICC < 1 mA quiescent; standby current < 2 µA when both driver and receiver are disabled.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN65HVD72DR
SN65HVD72DRD
SN65HVD72DRDGKR
SN65HVD72DRDGK
SN65HVD72DRBR
SN65HVD72DRB

CAD (KiCad official)

Symbol: SN65HVD72DR
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
`sn65hvd72dr.step`	122 KB	You want the bare part, or you mark your own boards.
`sn65hvd72dr-etched.step`	2.1 MB	You want the part with `SN65HVD72DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 534 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 b46f5803fa8302f9, 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