WS3085N

GEC · RS-485 / RS-422 ICs · SOP-8

WS3085N from GEC, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	RO	output	Receiver output, enabled when RE is low: after polarity detection, RO is high if V(A)-V(B) > 100 mV and low if V(A)-V(B) < -100 mV.
2	RE	input	Receiver output enable, active low: RO is valid when RE is low and the receiver is disabled when RE is high; with RE high and DE low the chip enters low-power shutdown.
3	DE	input	Driver output enable, active high: driver is enabled when DE is high and disabled to a high-impedance output when DE is low; with RE high and DE low the chip enters shutdown.
4	DI	input	Driver input: DI low forces the non-inverting output low and the inverting output high, and DI high forces the non-inverting output high and the inverting output low.
5	GND	power_in	Ground reference for the device.
6	X1	bidirectional	Bus interface pin that is determined as either the A or B port from bus state (X1 and X2 are one A and one B), and defaults to the A port at power-up.
7	X2	bidirectional	Bus interface pin that is determined as either the A or B port from bus state (X1 and X2 are one A and one B), and defaults to the B port at power-up.
8	Vcc	power_in	Positive supply, recommended 5 V within 4.75 V to 5.25 V; bypass VCC to GND with a 0.1 µF capacitor.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Differential driver output (no load)	VOD1	5			伏	图 1，（注 1）	2
Differential driver output RS-422	VOD2	2			伏	图 1,R=50Ω(RS-422)	2
Differential driver output RS-485	VOD2	1.5			伏	图 1,R=27Ω(RS-485)	2
Differential output amplitude change	∆VOD			0.2	伏	图 1,R =50ΩorR=27Ω	2
Driver output common-mode voltage	VOC	1		3	伏	图 1,R=50ΩorR=27Ω	2
Driver output common-mode voltage change	∆VOC			0.2	伏	图 1,R=50ΩorR=27Ω	2
Input high voltage	VIH1	2			伏	DE, DI, RE	2
Input low voltage	VIL1			0.8	伏	DE, DI, RE	2
DI input hysteresis	VHYS	100			毫伏		2
Input current DE, DI, RE	IIN1	-2		2	微安		2
Input current X1 and X2 (positive)	IIN4			125	微安	DE = GND, VCC=GND or 5.25V, VIN=12V	2
Input current X1 and X2 (negative)	IIN4	-75			微安	DE = GND, VCC=GND or 5.25V, VIN=-7V	2
Driver output short-circuit current	IOD1	-100			毫安	-7V≤VOUT≤VCC	2
Driver output short-circuit current	IOD1			100	毫安	0V≤VOUT≤12V	2
Driver output short-circuit current	IOD1	-25		25	毫安	0V≤VOUT≤VCC	2
Receiver differential input threshold voltage	VTH	-100		100	毫伏	-7V≤VCM≤+12V	2
Receiver differential input threshold hysteresis	∆VTH	60			毫伏		2
Receiver output high voltage	VOH	4			伏	IO=-4mA,VID=1V	2
Receiver output low voltage	VOL			0.4	伏	IO=4mA,VID=-1V	2
Receiver output high-impedance leakage current	IOZR	-1		1	微安	0.4V≤VO≤2.4V	2
Receiver input resistance	RIN	96			千欧姆	-7V≤VCM≤+12V	2
Receiver output short-circuit current (first value)	IOSR	-7		7	毫安	0V≤VRO≤VCC	3
Receiver output short-circuit current (second value)	IOSR	-95		95	毫安	0V≤VRO≤VCC	3
Static supply current, DE=VCC	ICC		480	600	微安	No load, RE, DI = GND or Vcc, DE=VCC	3
Static supply current, DE=GND	ICC		420	600	微安	No load, RE, DI = GND or Vcc, DE=GND	3
Shutdown current	ISHDN		1.8	10	微安	DE GND, RE Vcc	3
ESD X1/X2 contact discharge (IEC 61000-4-2)		-12		12	千伏	IEC 61000-4-2 contact discharge	3
ESD X1/X2 human body model		-15		15	千伏	Human body model	3
ESD other pins human body model		-4		4	千伏	Human body model	3
Adaptive polarity determination time	Ta	65			毫秒	DE=0，RE=0，RO=0	3
Driver input to output delay (low to high)	tDPLH	250	720	1000	纳秒	图 3 和 5, RDIFF=54 欧姆，CL=54pF	3
Driver input to output delay (high to low)	tDPHL	250	720	1000	纳秒	图 3 和 5, RDIFF=54 欧姆，CL=54pF	3
Driver differential output delay skew	tDSKEW	-100	-3	100	纳秒	图 3 和 5,RDIFF=54 欧姆，CL1=CL2=100pF	3
Driver rise and fall time	tDR, tDF	400	700	1200	纳秒	图 3 和 5, RDIFF=54 欧姆，CL1=CL2=100pF	3
Maximum data rate	fMAX			500	kbps		3
Driver enable to output high	tDZH			2500	纳秒	图 4 和 6,CL=100pF,S2 关断	3
Driver enable to output low	tDZL			2500	纳秒	图 4 和 6,CL=100pF,S1 关断	3
Driver output low to disable	tDLZ			500	纳秒	图 4 和 6, CL=15pF,S1 关断	3
Driver output high to disable	tDHZ			500	纳秒	图 4 和 6, CL=15pF,S2 关断	3
Receiver input to output delay (low to high)	tRPLH		125	250	纳秒	图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒	3
Receiver input to output delay (high to low)	tRPHL		125	250	纳秒	图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒	3
Receiver propagation delay skew	/ tRPLH - tRPHL /	-50	10	50	纳秒	图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒	3
Receiver enable to output low	tRZL	20		120	纳秒	图 2 和 8, CL= 100pF,S1 关断	3
Receiver enable to output high	tRZH	20		120	纳秒	图 2 和 8, CL=100pF,S2 关断	3
Receiver output high to disable	tRZL	20		120	纳秒	图 2 和 8, CL=100pF,S1 关断	3
Receiver output low to disable	tRHZ	20		120	纳秒	图 2 和 8, CL=100pF,S2 关断	4
Chip shutdown time	tSHDN	50	200	600	纳秒	注 4: RE=1, DE=0	4
Driver enable from shutdown to output high	tDZH(SHDN)			4500	纳秒	图 4 和 6,CL=15pF,S2 关断	4
Driver enable from shutdown to output low	tDZL(SHDN)			4500	纳秒	图 4 和 6,CL=15pF,S1 关断	4
Receiver enable from shutdown to output high	tRZH(SHDN)			3500	纳秒	图 2 和 8,CL=100pF,S2 关断	4
Receiver enable from shutdown to output low	tRZL(SHDN)			3500	纳秒	图 2 和 8,CL=100pF,S1 关断	4
Supply voltage VCC (maximum operating voltage)	VCC			7	V		8
Logic pin voltage (DE, RE, DI, RO)		-0.3		7	V		8
Bus pin voltage (A, B)		-8		13	℃		8
Storage temperature	TSTG	-65		150	℃		8
Maximum junction temperature	TJ			150	℃		8
ESD HBM	ESD-HBM			2000	V		8
Recommended operating supply voltage	VDD	4.75	5	5.25	V		8
Operating temperature	TA	-40		125	℃		8

CAD (KiCad official)

Symbol: WS3085N
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)
3D model files: ws3085n-etched.step / ws3085n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ws3085n.step / ws3085n.glb are the bare package body.

Provenance

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

Datasheet: GEC datasheet (11 pp, sha256 900ac1bb3eeb752b, retrieved 2026-10-18, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# WS3085N

**GEC** · RS-485 / RS-422 ICs · SOP-8

WS3085N from GEC, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RO | output | Receiver output, enabled when RE is low: after polarity detection, RO is high if V(A)-V(B) > 100 mV and low if V(A)-V(B) < -100 mV. |
| 2 | RE | input | Receiver output enable, active low: RO is valid when RE is low and the receiver is disabled when RE is high; with RE high and DE low the chip enters low-power shutdown. |
| 3 | DE | input | Driver output enable, active high: driver is enabled when DE is high and disabled to a high-impedance output when DE is low; with RE high and DE low the chip enters shutdown. |
| 4 | DI | input | Driver input: DI low forces the non-inverting output low and the inverting output high, and DI high forces the non-inverting output high and the inverting output low. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | X1 | bidirectional | Bus interface pin that is determined as either the A or B port from bus state (X1 and X2 are one A and one B), and defaults to the A port at power-up. |
| 7 | X2 | bidirectional | Bus interface pin that is determined as either the A or B port from bus state (X1 and X2 are one A and one B), and defaults to the B port at power-up. |
| 8 | Vcc | power_in | Positive supply, recommended 5 V within 4.75 V to 5.25 V; bypass VCC to GND with a 0.1 µF capacitor. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Differential driver output (no load) | VOD1 | 5 |  |  | 伏 | 图 1，（注 1） | 2 |
| Differential driver output RS-422 | VOD2 | 2 |  |  | 伏 | 图 1,R=50Ω(RS-422) | 2 |
| Differential driver output RS-485 | VOD2 | 1.5 |  |  | 伏 | 图 1,R=27Ω(RS-485) | 2 |
| Differential output amplitude change | ∆VOD |  |  | 0.2 | 伏 | 图 1,R =50ΩorR=27Ω | 2 |
| Driver output common-mode voltage | VOC | 1 |  | 3 | 伏 | 图 1,R=50ΩorR=27Ω | 2 |
| Driver output common-mode voltage change | ∆VOC |  |  | 0.2 | 伏 | 图 1,R=50ΩorR=27Ω | 2 |
| Input high voltage | VIH1 | 2 |  |  | 伏 | DE, DI, RE | 2 |
| Input low voltage | VIL1 |  |  | 0.8 | 伏 | DE, DI, RE | 2 |
| DI input hysteresis | VHYS | 100 |  |  | 毫伏 |  | 2 |
| Input current DE, DI, RE | IIN1 | -2 |  | 2 | 微安 |  | 2 |
| Input current X1 and X2 (positive) | IIN4 |  |  | 125 | 微安 | DE = GND, VCC=GND or 5.25V, VIN=12V | 2 |
| Input current X1 and X2 (negative) | IIN4 | -75 |  |  | 微安 | DE = GND, VCC=GND or 5.25V, VIN=-7V | 2 |
| Driver output short-circuit current | IOD1 | -100 |  |  | 毫安 | -7V≤VOUT≤VCC | 2 |
| Driver output short-circuit current | IOD1 |  |  | 100 | 毫安 | 0V≤VOUT≤12V | 2 |
| Driver output short-circuit current | IOD1 | -25 |  | 25 | 毫安 | 0V≤VOUT≤VCC | 2 |
| Receiver differential input threshold voltage | VTH | -100 |  | 100 | 毫伏 | -7V≤VCM≤+12V | 2 |
| Receiver differential input threshold hysteresis | ∆VTH | 60 |  |  | 毫伏 |  | 2 |
| Receiver output high voltage | VOH | 4 |  |  | 伏 | IO=-4mA,VID=1V | 2 |
| Receiver output low voltage | VOL |  |  | 0.4 | 伏 | IO=4mA,VID=-1V | 2 |
| Receiver output high-impedance leakage current | IOZR | -1 |  | 1 | 微安 | 0.4V≤VO≤2.4V | 2 |
| Receiver input resistance | RIN | 96 |  |  | 千欧姆 | -7V≤VCM≤+12V | 2 |
| Receiver output short-circuit current (first value) | IOSR | -7 |  | 7 | 毫安 | 0V≤VRO≤VCC | 3 |
| Receiver output short-circuit current (second value) | IOSR | -95 |  | 95 | 毫安 | 0V≤VRO≤VCC | 3 |
| Static supply current, DE=VCC | ICC |  | 480 | 600 | 微安 | No load, RE, DI = GND or Vcc, DE=VCC | 3 |
| Static supply current, DE=GND | ICC |  | 420 | 600 | 微安 | No load, RE, DI = GND or Vcc, DE=GND | 3 |
| Shutdown current | ISHDN |  | 1.8 | 10 | 微安 | DE GND, RE Vcc | 3 |
| ESD X1/X2 contact discharge (IEC 61000-4-2) |  | -12 |  | 12 | 千伏 | IEC 61000-4-2 contact discharge | 3 |
| ESD X1/X2 human body model |  | -15 |  | 15 | 千伏 | Human body model | 3 |
| ESD other pins human body model |  | -4 |  | 4 | 千伏 | Human body model | 3 |
| Adaptive polarity determination time | Ta | 65 |  |  | 毫秒 | DE=0，RE=0，RO=0 | 3 |
| Driver input to output delay (low to high) | tDPLH | 250 | 720 | 1000 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL=54pF | 3 |
| Driver input to output delay (high to low) | tDPHL | 250 | 720 | 1000 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL=54pF | 3 |
| Driver differential output delay skew | tDSKEW | -100 | -3 | 100 | 纳秒 | 图 3 和 5,RDIFF=54 欧姆，CL1=CL2=100pF | 3 |
| Driver rise and fall time | tDR, tDF | 400 | 700 | 1200 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL1=CL2=100pF | 3 |
| Maximum data rate | fMAX |  |  | 500 | kbps |  | 3 |
| Driver enable to output high | tDZH |  |  | 2500 | 纳秒 | 图 4 和 6,CL=100pF,S2 关断 | 3 |
| Driver enable to output low | tDZL |  |  | 2500 | 纳秒 | 图 4 和 6,CL=100pF,S1 关断 | 3 |
| Driver output low to disable | tDLZ |  |  | 500 | 纳秒 | 图 4 和 6, CL=15pF,S1 关断 | 3 |
| Driver output high to disable | tDHZ |  |  | 500 | 纳秒 | 图 4 和 6, CL=15pF,S2 关断 | 3 |
| Receiver input to output delay (low to high) | tRPLH |  | 125 | 250 | 纳秒 | 图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒 | 3 |
| Receiver input to output delay (high to low) | tRPHL |  | 125 | 250 | 纳秒 | 图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒 | 3 |
| Receiver propagation delay skew | / tRPLH - tRPHL / | -50 | 10 | 50 | 纳秒 | 图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒 | 3 |
| Receiver enable to output low | tRZL | 20 |  | 120 | 纳秒 | 图 2 和 8, CL= 100pF,S1 关断 | 3 |
| Receiver enable to output high | tRZH | 20 |  | 120 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 3 |
| Receiver output high to disable | tRZL | 20 |  | 120 | 纳秒 | 图 2 和 8, CL=100pF,S1 关断 | 3 |
| Receiver output low to disable | tRHZ | 20 |  | 120 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 4 |
| Chip shutdown time | tSHDN | 50 | 200 | 600 | 纳秒 | 注 4: RE=1, DE=0 | 4 |
| Driver enable from shutdown to output high | tDZH(SHDN) |  |  | 4500 | 纳秒 | 图 4 和 6,CL=15pF,S2 关断 | 4 |
| Driver enable from shutdown to output low | tDZL(SHDN) |  |  | 4500 | 纳秒 | 图 4 和 6,CL=15pF,S1 关断 | 4 |
| Receiver enable from shutdown to output high | tRZH(SHDN) |  |  | 3500 | 纳秒 | 图 2 和 8,CL=100pF,S2 关断 | 4 |
| Receiver enable from shutdown to output low | tRZL(SHDN) |  |  | 3500 | 纳秒 | 图 2 和 8,CL=100pF,S1 关断 | 4 |
| Supply voltage VCC (maximum operating voltage) | VCC |  |  | 7 | V |  | 8 |
| Logic pin voltage (DE, RE, DI, RO) |  | -0.3 |  | 7 | V |  | 8 |
| Bus pin voltage (A, B) |  | -8 |  | 13 | ℃ |  | 8 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 8 |
| Maximum junction temperature | TJ |  |  | 150 | ℃ |  | 8 |
| ESD HBM | ESD-HBM |  |  | 2000 | V |  | 8 |
| Recommended operating supply voltage | VDD | 4.75 | 5 | 5.25 | V |  | 8 |
| Operating temperature | TA | -40 |  | 125 | ℃ |  | 8 |

## CAD (KiCad official)

- Symbol: `WS3085N`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ws3085n-etched.step` / `ws3085n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ws3085n.step` / `ws3085n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GEC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903011645472768) (11 pp, sha256 `900ac1bb3eeb752b`, retrieved 2026-10-18, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ws3085n-datasheet.pdf)