SN65HVD20DR 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 CMOS output that reflects the state of the differential receiver comparing bus lines A and B.
2	RE	input	Receiver enable, active low. Drive low to enable the receiver output R; drive high to place R in a high-impedance state.
3	DE	input	Driver enable, active high. Drive high to enable the differential driver outputs A and B; drive low to place the driver in a high-impedance state.
4	D	input	Driver data input. Digital CMOS input; the logic level here determines the differential state driven on the A/B bus when DE is high.
5	GND	power_in	Local device ground / reference potential.
6	A	bidirectional	RS-485 differential bus line A (non-inverting). Driver output or receiver input, complementary to B. Extended common-mode range -20 V to 25 V.
7	B	bidirectional	RS-485 differential bus line B (inverting). Driver output or receiver input, complementary to A. Extended common-mode range -20 V to 25 V.
8	VCC	power_in	Supply voltage input, 4.5 V to 5.5 V. Bypass locally with a 100 nF ceramic capacitor to GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN65HVD20DR
SN65HVD20DRD
SN65HVD20DRP

CAD (KiCad official)

Symbol: SN65HVD20DR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (37 pp, sha256 7a91efb110506aa4, 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