component

HX3485-S

Public Made by Adom

by adom

ZHHXDZ RS-485 / RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterfacehx3485-sfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
hx3485-s / README.md
History Download
Ray Publish 0.1.0 5637f28 3h ago

HX3485-S

ZHHXDZ · RS-485 / RS-422 ICs · SOP-8

HX3485-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: when the receiver is enabled (RE low), RO goes high if V(A)-V(B) > -50mV and goes low if V(A)-V(B) < -200mV.
2 RE input Receiver output enable, active low: RE low enables RO, RE high disables the receiver, and RE high with DE low puts the chip into low-power shutdown.
3 DE input Driver output enable: DE high enables the driver outputs, and DE low disables the driver and places its outputs in high impedance.
4 DI input Driver data input: DI low forces A low and B high, and DI high forces A high and B low.
5 GND power_in Ground reference for the device; all voltages are referenced to this pin.
6 A bidirectional Bus terminal A (non-inverting): driver differential output and receiver non-inverting input, tied to the RS-485/RS-422 bus.
7 B bidirectional Bus terminal B (inverting): driver differential output and receiver inverting input, tied to the RS-485/RS-422 bus; ESD protected to ±15kV HBM.
8 Vcc power_in Supply pin for 3.3V or 5V operation; the absolute maximum rating is 3.0V to +6.0V per the datasheet limits table.

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
Logic input high voltage (DE, DI, RE) VIH1 2 V DE,DI, RE 2
Logic input low voltage (DE, DI, RE) VIL1 0.8 V DE,DI, RE 2
Receiver differential input threshold voltage VTH -200 -50 mV -7V≤VCM≤+12V 2
Receiver input resistance RIN 96 KΩ -7V≤VCM≤+12V 2
Receiver output low voltage VOL 0.4 V IO=4mA,VID=-1V 2
Receiver output tri-state leakage current IOZR -1 1 uA 0.4V≤VO≤2.4V 2
Receiver output short-circuit current IOSR 7 95 mA 0V≤VRO≤VCC 2
Differential output voltage change (DI change) ΔVOD 0.2 V R=50Ω or R=27Ω, 图 1 2
Receiver differential propagation delay skew tRSKD -50 10 50 ns VID 上升下降时间小于 15ns 图7,9 2
Chip shutdown time tSHDN 50 200 600 ns 2
Receiver enable to output low tRZL 20 120 ns CL=100pF,S1 关断 图 2,8 2
Receiver enable to output high tRZH 20 120 ns CL=100pF,S2 关断 图 2,8 2
Receiver output high to disable tRHZ 20 120 ns CL=100pF,S1 关断 图 2,8 2
Receiver output low to disable tRLZ 20 120 ns CL=100pF,S2 关断 图 2,8 2
Driver enable to output high from shutdown tDZH(SHDN) 4500 ns CL=15pF,S2 关断 图 4,6 2
Driver enable to output low from shutdown tDZL(SHDN) 4500 ns CL=15pF,S1 关断 图 4,6 2
Receiver enable to output high from shutdown tRZH(SHDN) 3500 ns CL=100pF,S2 关断 图 2,8 2
Receiver enable to output low from shutdown tRZL(SHDN) 3500 ns CL=100pF,S1 关断 图 2,8 2
Maximum data rate fMAX 500 kbps 2
Supply voltage VCC 3 6 V 2
Control input voltage (DE, RE) DE，RE -0.3 6 V 2
Driver input voltage (DI) DI -0.3 6 V 2
Driver output / receiver input voltage (A, B) A,B -8 13 V 2
Storage temperature range TSTG -65 150 ℃ 2
Operating temperature range TOP -40 125 ℃ 2
Power dissipation (SOP-8) PD 471 mW SOP-8, above +70℃ 2
Soldering temperature TL 300 ℃ 10 s 2

CAD (KiCad official)

  • Symbol: HX3485-S
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: hx3485-s-etched.step / hx3485-s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hx3485-s.step / hx3485-s.glb are the bare package body.

Provenance

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

  • Datasheet: ZHHXDZ datasheet (5 pp, sha256 55843297878d4f9e, retrieved 2026-10-20, 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