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SIT3485EUA
Public Made by Adomby adom
SIT RS-485 / RS-422 ICs, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSIT3485EUA
SIT · RS-485 / RS-422 ICs · MSOP-8
SIT3485EUA from SIT, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RO | output | Receiver Output. When enabled (RE low), RO outputs the logic level received from the differential bus (A-B). High-impedance when RE is high. |
| 2 | RE | input | Receiver Output Enable (active low). Drive low to enable the receiver output RO; drive high to place RO in high-impedance state. |
| 3 | DE | input | Driver Output Enable (active high). Drive high to enable the driver outputs A and B; drive low to place them in high-impedance state. |
| 4 | DI | input | Driver Input. Logic level applied here is transmitted onto the differential bus (A-B) when the driver is enabled (DE high). |
| 5 | GND | power_in | Ground reference (0 V) for the device. |
| 6 | A | bidirectional | Non-inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is high when V(A) - V(B) > +200 mV. |
| 7 | B | bidirectional | Inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is low when V(A) - V(B) < -200 mV. |
| 8 | VCC | power_in | Positive supply voltage input, 3.0 V to 3.6 V (typ 3.3 V). Bypass with 0.1 uF to GND close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SIT |
| Package | MSOP-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
SIT3485EUA
CAD (KiCad official)
- Symbol:
SIT3485EUA - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
sit3485eua-etched.step/sit3485eua-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sit3485eua.step/sit3485eua.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SIT datasheet (13 pp, sha256
5b55f1879c7f2a4b, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).