WS3085EESA-GEC from GEC, 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	RO	output	Receiver output. When the receiver is enabled and V(A)-V(B) > -50mV, RO is driven high; when V(A)-V(B) < -200mV, RO is driven low. Fail-safe high when the bus is open/shorted. VOH ≥ 4V @ IO = -4mA; VOL ≤ 0.4V @ IO = 4mA.
2	RE	input	Active-low receiver output enable. RE = 0 enables RO; RE = 1 places RO in high-impedance. When RE = 1 and DE = 0 the chip enters low-power shutdown (typ. 1.8µA).
3	DE	input	Driver output enable. DE = 1 enables the driver; DE = 0 places the driver outputs (A, B) in high-impedance. When RE = 1 and DE = 0 the entire chip enters shutdown.
4	DI	input	Driver data input. When DI is low the non-inverting bus output (A) is forced low and inverting (B) high; when DI is high A is high and B is low. VIH ≥ 2.0V, VIL ≤ 0.8V, 100mV typical hysteresis.
5	GND	power_in	Ground reference for all signals and supply.
6	A	bidirectional	RS-485/RS-422 bus interface, non-inverting driver output and non-inverting receiver input. ±15kV HBM / ±12kV IEC 61000-4-2 contact-discharge ESD protection. Rated for -7V to +12V common-mode range.
7	B	bidirectional	RS-485/RS-422 bus interface, inverting driver output and inverting receiver input. ±15kV HBM / ±12kV IEC 61000-4-2 contact-discharge ESD protection. Rated for -7V to +12V common-mode range.
8	VCC	power_in	Positive supply, 4.75V to 5.25V (5V nominal). Bypass to GND with a 0.1µF ceramic capacitor. Typical ICC = 450µA (max 600µA), shutdown ISHDN typ. 1.8µA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

WS3085EESA-GEC
WS3085EESA-GB

CAD (KiCad official)

Symbol: WS3085EESA-GEC
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: GEC datasheet (10 pp, sha256 322eb465dd4a8217, 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