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HX3085-S

ZHHXDZ · RS-485 / RS-422 ICs · SOP-8

HX3085-S from ZHHXDZ, 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 data output: driven high when the A-B differential input is at or above -50 mV and low when it is at or below -200 mV, per the receiver truth table.
2	RE	input	Receiver output enable: a low level enables the receiver output, and a high level with DE low puts RO into high-impedance (Z) state.
3	DE	input	Driver output enable: a high level enables the driver (chip in transmit state) and a low level disables it, placing A and B in high-impedance (Z) state.
4	DI	input	Driver data input: with DE high, a high level on DI drives A high and B low, and a low level drives A low and B high.
5	GND	power_in	Ground reference for the device; all voltages are referenced to ground.
6	A	bidirectional	Driver differential output (non-inverting) and receiver differential input; the A/B bus pins carry ±15 kV HBM ESD protection.
7	B	bidirectional	Driver differential output (inverting) and receiver differential input; the A/B bus pins carry ±15 kV HBM ESD protection.
8	VCC	power_in	Power supply; the datasheet specifies a working voltage range of 4.5 V to 5.5 V (nominal 5 V ±5%).

Key specifications

Parameter	Value
Manufacturer	ZHHXDZ
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	Max	Unit	Conditions	Page
Supply voltage	VCC		6	V		2
Control input voltage	DE,RE		6	V		2
Drive input voltage	DI		6	V		2
Drive output voltage / receive input voltage	A,B	-7	12	V		2
Storage temperature range	TSTG	-55	150	℃		2
Operating temperature range	TOP	-40	85	℃		2
Maximum operating temperature range	TMOP	-55	125	℃		2
Power dissipation	PD		470	mW	SOP-8 (+70℃ or above)	2
Solder temperature	TL		300	℃	10 seconds	2
Working voltage range	Vcc	4.5	5.5	V		2
Driver differential output (no load)	VOD1		5	V	No load	2
Driver differential output (with load)	VOD2	1.5		V	R=54Ω or R=27Ω, Figure 1	2
Change in VOD when DI changes	∆VOD		0.2	V		2
Driver common mode output voltage	VOC	1	3	V		2
Change in VOC when DI changes	∆VOC		0.2	V		2
Input high voltage	VIH	2		V	DE,RE,DI	2
Input low voltage	VIL		0.8	V	DE,RE,DI	2
Input current	IIN1	-2	2	uA	DE,RE,DI	2
Input current (A, B)	IIN2	40	90	uA	DE=0V, Vcc=5V, VIN=5V	2
Input current (A, B)	IIN2	60	100	uA	DE=0V, Vcc=5V, VIN=0V	2
Receiver differential input threshold voltage	VTH	-200	-50	mV	-7V ≤VCM≤+12V	2
Differential receiver threshold change	∆VTH		25	mV		2
Receiver output high level	VOH	4		V	IO=-8mA	2
Receiver output low level	VOL		0.4	V	IO=8mA	2
Receiver output high-impedance leakage current	IOZR		1	uA	0.4V ≤Vo≤2.4V	2
Receiver input impedance	RIN	96		kΩ		2
No load operating current	ICC	480	600	uA	-7V ≤VCM≤+12V, RE=DI=GND or DE=Vcc	2
No load operating current	ICC	450	600	uA	DE=GND	2
Receiver output short-circuit current	IOSR		95	mA	0V ≤VRO≤	2
ESD protection (human body model)		-15	15	kV	Between A/B, human body mode	2
Drive input to output	tDPLH	250	1000	nS	RDIFF=50Ω, CL1=CL2=100pF, Figure 3,5	2
Driver output offset /tDPLH, tDPHL/	tDSKEW	-100	100	nS		2
Drive enables high output	tDZH		2500	nS	CL=100pF, Figure 4,6, S2 closed	2
Driver enables output to be low	tDZL		2500	nS	CL=100pF, Figure 4,6, S1 closed	2
Drive from low to off	tDLZ		100	nS	CL=15pF, Figure 4,6, S1 closed	2
Drive from high to off	tDHZ		100	nS	CL=15pF, Figure 4,6, S2 closed	2
Receiver input to output (low-to-high)	tRPLH		200	nS	/VID/ ≥2.0V; rising and falling time ≤15nS, Figure 7,9	2
Receiver input to output (high-to-low)	tRPHL		200	nS	/VID/ ≥2.0V; rising and falling time ≤15nS, Figure 7,9	2
Differential receiver offset	tRSKEW	-30	30	nS		2
The receiver stays on until output is low	tRZL	20	50	nS	S1 closed, CL=100pF, Figure 2,8	2
Enable the receiver to output high	tRZH	20	50	nS	S2 closed, CL=100pF, Figure 2,8	2
Receiver from low to off	tRLZ	20	50	nS	S1 closed, CL=100pF, Figure 2,8	2
Receiver from high to off	tRHZ	20	50	nS	S2 closed, CL=100pF, Figure 2,8	2
Driver output short-circuit current	IOD		100	mA	Short circuit current between A/B	2
Maximum data speed	fMAX	250	500	Mbps		3

CAD (KiCad official)

Symbol: HX3085-S
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)
3D model files: hx3085-s-etched.step / hx3085-s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hx3085-s.step / hx3085-s.glb are the bare package body.

Provenance

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

Datasheet: ZHHXDZ datasheet (4 pp, sha256 e6ee816fe55fa5ec, retrieved 2026-10-17, tier: lcsc)
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