SN65HVD1787EIM from HGSEMI, in a SOP-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 digital output that reflects the state of the differential receiver comparing bus pins A and B. High-Z when RE is high (receiver disabled).
2	RE	input	Receiver enable, active low. Drive low to enable the receiver and drive R with the bus state; drive high to place R in high-impedance and (with DE=low) enter low-power standby (typ. 1 µA).
3	DE	input	Driver enable, active high. Drive high to enable the differential driver so that D is transmitted onto the A/B bus pins; drive low to place the driver outputs in high-impedance.
4	D	input	Driver data input. CMOS-level TTL-compatible logic input; the state at D sets the differential polarity driven onto A/B when DE is high. VIH ≥ 2 V, VIL ≤ 0.8 V.
5	GND	power_in	Local device ground / reference potential. Return for the VCC supply and reference for all logic-level I/O.
6	A	bidirectional	RS-485 differential bus I/O, complementary to B. Acts as the non-inverting driver output when DE=high and as the non-inverting receiver input when the driver is disabled. Fault-protected to ±30 V (per '1787 spec) and rated to ±16 kV IEC HBM.
7	B	bidirectional	RS-485 differential bus I/O, complementary to A. Acts as the inverting driver output when DE=high and as the inverting receiver input when the driver is disabled. Fault-protected to ±30 V (per '1787 spec).
8	VCC	power_in	Supply voltage input, 4.5 V to 5.5 V (nom 5 V). Typical ICC is 5 mA in operation and 1 µA in standby (DE=low, RE=high). Bypass locally with a 100 nF ceramic to GND.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN65HVD1787EIM
SN65HVD1787EIM/TR
SN65HVD1787EIMEIN
SN65HVD1787EIMM
SN65HVD1787EIMM/TR

CAD (KiCad official)

Symbol: SN65HVD1787EIM
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn65hvd1787eim.step`	122 KB	You want the bare part, or you mark your own boards.
`sn65hvd1787eim-etched.step`	2.4 MB	You want the part with `SN65HVD1787EIM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 601 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: HGSEMI datasheet (25 pp, sha256 5c40e5bdde3db2e4, retrieved 2026-08-17, tier: lcsc)
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