65HVD1787EIM from HGSEMI, 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	RO	output	Receiver output. When RE is low: if (A - B) >= -50mV, RO drives high; if (A - B) <= -200mV, RO drives low. High-Z when receiver is disabled.
2	RE	input	Receiver enable (active-low). RE low enables receiver output RO; RE high places RO in high impedance. RE high together with DE low puts the device into low-power shutdown mode. Hot-swap input structure.
3	DE	input	Driver enable (active-high). DE high enables the differential driver outputs A/B; DE low tri-states them. RE high together with DE low puts the device into low-power shutdown mode. Hot-swap input structure.
4	DI	input	Driver data input. With DE high, DI low forces output A low and output B high; DI high forces A high and B low. VIH = 2V min, VIL = 0.8V max.
5	GND	power_in	Ground reference (0V).
6	A	bidirectional	Non-inverting RS-485/RS-422 bus line. Receiver non-inverting input and driver non-inverting output. Withstands -7V to +12V bus common-mode range; ±16kV IEC 61000-4-2 ESD.
7	B	bidirectional	Inverting RS-485/RS-422 bus line. Receiver inverting input and driver inverting output. Withstands -7V to +12V bus common-mode range; ±16kV IEC 61000-4-2 ESD.
8	VCC	power_in	Positive supply, 4.5V to 5.5V. Bypass to GND with a 0.1µF ceramic capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

65HVD1787EIMECM/TR
65HVD1787EIM/TR
65HVD1787EIMECN
65HVD1787EIMEIN

CAD (KiCad official)

Symbol: 65HVD1787EIM
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: HGSEMI datasheet (17 pp, sha256 36fb131398d1c88b, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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