SN65HVD1780DR 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	Receiver data output. CMOS-level digital output driven by the differential receiver comparing A and B bus inputs.
2	RE	input	Receiver enable (active low). Drive low to enable the receiver output R; drive high to place R in high-impedance state.
3	DE	input	Driver enable (active high). Drive high to enable the differential driver onto the A/B bus; drive low to place driver outputs in high-impedance state.
4	D	input	Driver data input. CMOS-level digital input; logic level is transmitted differentially onto the A/B bus when DE is high.
5	GND	power_in	Local device ground reference.
6	A	bidirectional	Non-inverting RS-485 bus I/O. Driver output or receiver input (complementary to B). Fault-protected to >±70 V, ±16-kV HBM ESD.
7	B	bidirectional	Inverting RS-485 bus I/O. Driver output or receiver input (complementary to A). Fault-protected to >±70 V, ±16-kV HBM ESD.
8	VCC	power_in	Supply voltage input. Operating range 3.15 V to 5.5 V (nominal 5 V); absolute max 7 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN65HVD1780DR
SN65HVD1780DRD
SN65HVD1780DRP

CAD (KiCad official)

Symbol: SN65HVD1780DR
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 (34 pp, sha256 f8736dab94b48730, 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