UM3483EESA

@@ -0,0 +1,50 @@+# UM3483EESA++**Union Semiconductor** · RS-485 / RS-422 ICs · SOP-8++UM3483EESA from Union Semiconductor, 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. CMOS logic-level output of the RS-485 receiver. VOH ≥ VCC-1.5V at IOUT=-1.5mA; VOL ≤ 0.4V at IOUT=2.5mA. High-impedance when /RE is high; fail-safe high when inputs are open, shorted, or idle. |+| 2 | /RE | input | Receiver Output Enable (active low). Drive low to enable the receiver output RO; drive high to place RO in high-impedance. Combined with DE=low, forces the device into low-power shutdown (ISHDN = 1µA). |+| 3 | DE | input | Driver Output Enable (active high). Drive high to enable the differential driver outputs A and B; drive low to place them in high-impedance. Combined with /RE=high, forces the device into low-power shutdown. |+| 4 | DI | input | Driver Input. CMOS logic-level input to the RS-485 driver. VIH ≥ 2.0V, VIL ≤ 0.8V. Logic level on DI is transmitted differentially onto A/B when DE is high. |+| 5 | GND | power_in | Ground reference (0V) for the device. |+| 6 | A | bidirectional | Non-inverting differential RS-485 bus line. Driver output when DE=high, receiver input when /RE=low. Common-mode operating range -7V to +12V; ±15kV HBM / ±15kV IEC61000-4-2 air-gap / ±8kV IEC61000-4-2 contact ESD protected. |+| 7 | B | bidirectional | Inverting differential RS-485 bus line. Driver output when DE=high, receiver input when /RE=low. Common-mode operating range -7V to +12V; ±15kV HBM / ±15kV IEC61000-4-2 air-gap / ±8kV IEC61000-4-2 contact ESD protected. |+| 8 | VCC | power_in | Positive supply, +3V to +5.5V operating range (+7V absolute max). Typical operating supply current 300µA (no load). Bypass with a local decoupling capacitor to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Union Semiconductor |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `UM3483EESA`+- `UM3483EESAUM3486EESA`+- `UM3483EESAUM3483EEPA`+- `UM3483EESAUM3486EEPA`++## CAD (KiCad official)++- Symbol: `UM3483EESA`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Union Semiconductor datasheet](docs/um3483eesa-datasheet.pdf) (18 pp, sha256 `b365bb8b2878eac1`, 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).++[Datasheet PDF](docs/um3483eesa-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "um3483eesa",+  "version": "0.1.0",+  "type": "component",+  "description": "Union Semiconductor RS-485 / RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "interface",+    "um3483eesa"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "um3483eesa.kicad_sym",+    "um3483eesa.kicad_mod",+    "um3483eesa.glb",+    "um3483eesa.step",+    "um3483eesa.lbr",+    "docs/hero.png",+    "docs/um3483eesa-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file