component
ST485EBDR
Public Made by Adomby adom
UMW RS-485/RS-422 ICs, SOP-8. Datasheet-verified pinout, 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
markdownST485EBDR
UMW · RS-485/RS-422 ICs · SOP-8
ST485EBDR from UMW, in a SOP-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. Drives high when A-B >= +0.2V, low when A-B <= -0.2V, and high (fail-safe) if inputs are open. High-impedance when RE is high. |
| 2 | RE | input | Receiver output enable, active-low. RE = 0 enables RO; RE = 1 places RO in a high-impedance state. TTL/CMOS input (VIH >= 2V, VIL <= 0.8V). |
| 3 | DE | input | Driver output enable, active-high. DE = 1 enables the differential A/B driver outputs; DE = 0 places A and B in a high-impedance state. TTL/CMOS input (VIH >= 2V, VIL <= 0.8V). |
| 4 | DI | input | Driver input. When DE is high, DI = 1 drives A high / B low; DI = 0 drives A low / B high. TTL/CMOS input (VIH >= 2V, VIL <= 0.8V). |
| 5 | GND | power_in | Ground return for the device. |
| 6 | A | bidirectional | Non-inverting differential bus I/O. Driver non-inverting output when DE=1, and receiver non-inverting input. Withstands -7V to +14V common-mode; short-circuit protected (35 mA min, 250 mA max). |
| 7 | B | bidirectional | Inverting differential bus I/O. Driver inverting output when DE=1, and receiver inverting input. Withstands -7V to +14V common-mode; short-circuit protected (35 mA min, 250 mA max). |
| 8 | VCC | power_in | Positive supply, +5V (4.75V to 5.25V). Absolute maximum 7V. Typical no-load supply current 300-400 µA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Comm/UART |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
ST485EBDR
CAD (KiCad official)
- Symbol:
ST485EBDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
st485ebdr-etched.step/st485ebdr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st485ebdr.step/st485ebdr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (8 pp, sha256
3c644adb7eb56559, retrieved 2026-08-17, tier: lcsc) - 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).