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HX1485-S

ZHHXDZ · RS-485 / RS-422 ICs · SOP-8

HX1485-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 low when A-B is at -200 mV, and high at -50 mV, with an open-circuit or short-circuit receiver input (fail-safe).
2	RE	input	Receiver enable input: the receiver output is active when RE is low and goes to high impedance when RE is high.
3	DE	input	Driver enable input: the chip is in the transmit state when DE is high, and the driver outputs A and B are high impedance when DE is low.
4	DI	input	Driver data input: with DE high, DI high drives A high and B low, and DI low drives A low and B high.
5	GND	power_in	Ground reference for the device.
6	A	bidirectional	Non-inverting driver differential output and receiver differential input; tri-state when the driver is disabled, with ±15 kV HBM ESD protection between A and B.
7	B	bidirectional	Inverting driver differential output and receiver differential input; tri-state when the driver is disabled, with ±15 kV HBM ESD protection between A and B.
8	VCC	power_in	Power supply, specified at 5 V ±5% (working voltage range 4.5 V to 5.5 V).

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	Typ	Max	Unit	Conditions	Page
Working voltage range	Vcc	4.5		5.5	V		2
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	℃	Solder temperature (10 seconds)	2
Driver differential output (with load)	VOD2	1.5			V	R=54Ω or R=27Ω, Figure 1	2
Change in driver differential output when DI changes	∆VOD			0.2	V		2
Driver common mode output voltage	VOC	1		3	V		2
Change in driver common mode output voltage when DI changes	∆VOC			0.2	V		2
Input high voltage (DE, RE, DI)	VIH	2			V		2
Input low voltage (DE, RE, DI)	VIL			0.8	V		2
Input current (DE, RE, DI)	IIN1	-2		2	uA		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
Receiver differential input threshold voltage 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 leakage current (tri-state)	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 (DE=GND)	ICC		450	600	uA	DE=GND	2
Receiver output short-circuit current	IOSR			95	mA	0V ≤VRO≤	2
Driver output short-circuit current	IOD			100	mA	Short circuit current between A/B	2
Driver input to output, low to high	tDPLH	250		1000	nS	RDIFF=50Ω, CL1=CL2=100pF, Figure 3,5	2
Driver input to output, high to low	tDPHL	250		1000	nS	RDIFF=50Ω, CL1=CL2=100pF, Figure 3,5	2
Driver output offset /tDPLH, tDPHL/	tDSKEW	-100		100	nS		2
Driver 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; VID rising and falling time ≤15nS, Figure 7,9	2
Receiver input to output, high to low	tRPHL			200	nS	/VID/ ≥2.0V; VID rising and falling time ≤15nS, Figure 7,9	2
Differential receiver offset	tRSKEW	-30		30	nS		2
Receiver enables output to be low	tRZL		20	50	nS	S1 closed, CL=100pF, Figure 2,8	2
Receiver enable 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

CAD (KiCad official)

Symbol: HX1485-S
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)
3D model files: hx1485-s-etched.step / hx1485-s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hx1485-s.step / hx1485-s.glb are the bare package body.

Provenance

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

Datasheet: ZHHXDZ datasheet (4 pp, sha256 55d584b89ded8ffd, retrieved 2026-10-18, 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