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HT83485ARZ

Public Made by Adom

by adom

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

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Contents

README

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HT83485ARZ

HTCSEMI · RS-485 / RS-422 ICs · SOP-8

HT83485ARZ from HTCSEMI, 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, three-state; high when A-B ≥ +0.2V or input open, low when A-B ≤ -0.2V, high-impedance when RE is high.
2 RE input Active-low receiver output enable; RE low enables RO, RE high puts RO in high impedance (VIH 2.0V min, VIL 0.8V max).
3 DE input Driver output enable; DE high enables the driver outputs, DE low places them in high impedance (VIH 2.0V min, VIL 0.8V max).
4 DI input Driver input; with DE high, DI low forces the non-inverting output low and DI high forces it high (VIH 2.0V min, VIL 0.8V max).
5 GND power_in Ground reference for all device voltages.
6 A bidirectional Non-inverting receiver input and driver output on the RS-485/RS-422 bus, rated -7.5V to +12.5V.
7 B bidirectional Inverting receiver input and driver output on the RS-485/RS-422 bus, rated -7.5V to +12.5V.
8 VCC power_in Positive supply, 3.3V ±0.3V operating, 7V absolute maximum.

Key specifications

Parameter Value
Manufacturer HTCSEMI
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
Input High Voltage VIH 2 V DE, DI, RE 2
Input Low Voltage VIL 0.8 V DE, DI, RE 2
Input Current IIN1 -2 2 µA DE, DI, RE 2
Input Current (A, B) IIN2 1 mA DE = 0V; VIN = 12V 2
Input Current (A, B) IIN2 -0.8 mA VCC = 0V or 3.35V; VIN = -7V 2
Receiver Differential Threshold Voltage VTH -0.2 0.2 V -7V ≤ VCM ≤ +12V 2
Receiver Output High Voltage VOH 2.5 V IO = -1.5mA, VID = 200mV 2
Receiver Output Low Voltage VOL 0.4 V IO = 2.5mA, VID = -200mV 2
Three-State (high impedance) Output Current at Receiver IOZR -1 1 µA 2
No-Load Supply Current (Note 3) ICC 500 800 µA DE = VCC 3
No-Load Supply Current (Note 3) ICC 300 400 µA RE = 0V or VCC; DE = 0V 3
ESD Protection (Human Body Model) -15 15 kV A, B, Y and Z pins; Human Body Model 3
Driver Input to Output (low-to-high) tPLH 10 80 100 ns RDIFF = 54Ω 3
Driver Input to Output (high-to-low) tPHL 10 80 100 ns CL1 = CL2 = 100pF 3
Driver Output Skew to Output tSKEW 5 10 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 3
Driver Enable to Output High tZH 55 80 ns CL = 100pF, S2 closed 3
Driver Enable to Output Low tZL 55 80 ns CL = 100pF, S1 closed 3
Driver Disable Time from Low tLZ 60 90 ns CL = 15pF, S1 closed 3
Driver Disable Time from High tHZ 60 90 ns CL = 15pF, S2 closed 3
Differential Driver Skew /tPLH - tPHL/ tSKD 13 20 ns RDIFF = 54Ω 3
Receiver Input to Output (low-to-high) tPLH 20 120 200 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 3
Receiver Input to Output (high-to-low) tPHL 20 120 200 ns 3
Receiver Skew /tPLH - tPHL/ 5 10 ns CL1 = CL2 = 100pF 3
Receiver Enable to Output Low tZL 50 90 ns CRL = 15pF, S1 closed 3
Receiver Enable to Output High tZH 50 90 ns CRL = 15pF, S2 closed 3
Receiver Disable Time from Low tLZ 40 80 ns CRL = 15pF, S1 closed 3
Receiver Disable Time from High tHZ 40 80 ns CRL = 15pF, S2 closed 3
Maximum Data Rate fMAX 2.5 5 10 Mbps 3
Supply Voltage VCC (3.3 V nominal, ±0.3 V tolerance) VCC -0.3 3.3 0.3 V VCC = 3.3V ±0.3V, TA = TMIN to TMAX 2
Supply Voltage (VCC) VCC 7 V 2
Control Input Voltage -0.3 7 V 2
Driver Input Voltage (DI) -0.3 7 V 2
Driver Output Voltage (A, B) -7.5 12.5 V 2
Receiver Input Voltage (A, B) -7.5 12.5 V 2
Receiver Output Voltage (RO) -0.3 V max = VCC + 0.3V 2
Operating Temperature Range -40 85 °C 2
Storage Temperature Range -65 160 °C 2
Lead Temperature (soldering) 300 °C soldering, 10 sec 2
Continuous Power Dissipation (8-Pin SOP) 471 mW TA = +70°C; derate 5.88mW/°C above +70°C 2

CAD (KiCad official)

  • Symbol: HT83485ARZ
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: ht83485arz-etched.step / ht83485arz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht83485arz.step / ht83485arz.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (8 pp, sha256 a9c210de7b8b172f, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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