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SIT75179BDR

Public Made by Adom

by adom

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

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Symbol & Footprint

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Datasheet

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Contents

README

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SIT75179BDR

SIT · RS-485/RS-422 ICs · SOP-8

SIT75179BDR from SIT, 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 VCC power_in Power supply input, 4.5V ≤ VCC ≤ 5.5V.
2 RO output Receiver output: high if A-B ≥ -10mV, low if A-B ≤ -200mV.
3 DI input Driver input: low drives Y low and Z high, high drives Y high and Z low.
4 GND power_in Ground.
5 Y output Driver non-inverting output.
6 Z output Driver inverting output.
7 B input Receiver inverting input.
8 A input Receiver non-inverting input.

Key specifications

Parameter Value
Manufacturer SIT
Package SOP-8
Category Interface ICs
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
Supply voltage VCC 7 V 2
Control port voltage (DI) DI -0.3 V -0.3 to VCC+0.3 2
Bus input voltage A, B A, B -8 13 V 2
Receiver output voltage (RO) RO -0.3 V -0.3 to VCC+0.3 2
Operating temperature range -40 125 °C 2
Storage temperature range -60 150 °C 2
Soldering temperature 300 °C 2
Continuous power dissipation SOP8 400 mW SOP8 2
Supply voltage VCC 4.5 5.5 V 2
Driver differential output, no load VOD1 5 V no load 3
Driver differential output VOD2 1.5 2.3 V Fig 2, RL = 27 Ω 3
Driver differential output VOD2 2 2.8 V Fig 2, RL = 50 Ω 3
Change in magnitude of output voltage ΔVOD 0.2 V Fig 2, RL = 27 Ω 3
Output common-mode voltage VOC 3 V Fig 2, RL = 27 Ω 3
Change in magnitude of common-mode output voltage ΔVOC 0.2 V Fig 2, RL = 27 Ω 3
High-level input voltage VIH 2 V DI 3
Low-level input voltage VIL 0.8 V DI 3
Logic input current IIN1 -2 2 uA DI 3
Output short-circuit current, short to high IOSD1 35 250 mA short to 0V~12V 3
Output short-circuit current, short to low IOSD2 -250 -35 mA short to -7V~0V 3
Input current (A, B) IIN2 125 uA VCC=0 or 5V, VIN = 12V 3
Input current (A, B) IIN2 -100 uA VCC=0 or 5V, VIN = -7 V 3
Positive-going input threshold voltage VIT+ -10 mV -7V≦VCM≦12V 3
Negative-going input threshold voltage VIT- -200 mV -7V≦VCM≦12V 3
Input hysteresis voltage Vhys 10 30 mV -7V≦VCM≦12V 3
Low-level output voltage VOL 0.4 V IOUT = +4mA, VID = -200 mV 4
Three-state input leakage current IOZR -1 1 uA 0.4 V < VO < 2.4 V 4
Receiver input resistance RIN 96 kΩ -7V≦VCM≦12V 4
Receiver short-circuit current IOSR 7 95 mA 0 V≤VO≤VCC, printed ±7 to ±95 4
Supply current ICC 220 400 uA DI=0 or VCC 4
ESD HBM, A, B, Y, Z -15 15 KV Human body model 4
ESD HBM, other pins -6 6 KV Human body model 4
Driver propagation delay low to high tDPLH 18 42 ns RDIFF = 54 Ω, CL1=CL2=100pF 4
Driver propagation delay high to low tDPHL 18 42 ns RDIFF = 54 Ω, CL1=CL2=100pF 4
Driver skew /tDPLH - tDPHL/ tSKEW1 8 10 ns RDIFF = 54 Ω, CL1=CL2=100pF 4
Driver rise/fall time tDR, tDF 30 ns 5
Receiver propagation delay low to high tRPLH 30 100 ns VID≥2.0V; rise and fall time VID≤15ns 5
Receiver propagation delay high to low tRPHL 30 100 ns VID≥2.0V; rise and fall time VID≤15ns 5
Receiver skew /tRPLH - tRPHL/ tSKEW2 8 10 ns VID≥2.0V; rise and fall time VID≤15ns 5

CAD (KiCad official)

  • Symbol: SIT75179BDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: sit75179bdr-etched.step / sit75179bdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sit75179bdr.step / sit75179bdr.glb are the bare package body.

Provenance

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

  • Datasheet: SIT datasheet (9 pp, sha256 3dae4ebfa9efdde4, retrieved 2026-10-27, 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-sonnet-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