SIT3490EESA

@@ -38,6 +38,20 @@ SIT3490EESA from SIT, in a SOP-8. Pinout and pin descriptions extracted from the - Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm` - 3D model: SOP-8 (KiCad packages3D, STEP) +## 3D model downloads++Two STEP files. Same geometry, different body top:++| File | Size | Use it when |+|---|---|---|+| [`sit3490eesa.step`](sit3490eesa.step) | 122 KB | You want the bare part, or you mark your own boards. |+| [`sit3490eesa-etched.step`](sit3490eesa-etched.step) | 2.3 MB | You want the part with `SIT3490EESA` already on it. |++The marking in the etched file is real recessed geometry cut into the solid, not a+texture or a decal: 577 faces against 147 in the bare model. It+survives export, section views, and rendering in any CAD tool, and it drops straight+into KiCad or Fusion with no extra setup.+ ## Provenance  Data extracted from the manufacturer datasheet, not a distributor listing:

@@ -1,6 +1,6 @@ {   "slug": "sit3490eesa",-  "version": "0.1.0",+  "version": "0.2.0",   "type": "component",   "description": "SIT RS-485 / RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",   "tags": [

@@ -4,7 +4,7 @@   "slug": "sit3490eesa",   "title": "SIT3490EESA",   "brief": "SIT RS-485 / RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",-  "version": "0.1.0",+  "version": "0.2.0",   "license": "CC-BY-SA-4.0",   "tags": [     "component",@@ -34,19 +34,19 @@         "number": "1",         "name": "VCC",         "type": "power_in",-        "description": "Positive supply input. Operating range 3.0V to 5.5V (absolute max +7V). Typical supply current ICC = 240\u00b5A (max 400\u00b5A). Bypass locally to GND."+        "description": "Positive supply input. Operating range 3.0V to 5.5V (absolute max +7V). Typical supply current ICC = 240µA (max 400µA). Bypass locally to GND."       },       {         "number": "2",         "name": "RO",         "type": "output",-        "description": "Receiver output (CMOS logic). RO is high when A\u2212B \u2265 +200mV and low when A\u2212B \u2264 \u2212200mV. VOH \u2265 VCC\u22121.5V at \u22124mA; VOL \u2264 0.4V at +4mA."+        "description": "Receiver output (CMOS logic). RO is high when A−B ≥ +200mV and low when A−B ≤ −200mV. VOH ≥ VCC−1.5V at −4mA; VOL ≤ 0.4V at +4mA."       },       {         "number": "3",         "name": "DI",         "type": "input",-        "description": "Driver input (CMOS logic). A low on DI forces Y low and Z high; a high on DI forces Y high and Z low. VIH \u2265 2.0V, VIL \u2264 0.8V, input leakage \u00b12\u00b5A."+        "description": "Driver input (CMOS logic). A low on DI forces Y low and Z high; a high on DI forces Y high and Z low. VIH ≥ 2.0V, VIL ≤ 0.8V, input leakage ±2µA."       },       {         "number": "4",@@ -58,25 +58,25 @@         "number": "5",         "name": "Y",         "type": "output",-        "description": "Non-inverting differential driver output to the RS-485/RS-422 bus. Differential swing VOD \u2265 1.5V into RL = 54\u03a9. \u00b115kV HBM ESD protected. Includes short-circuit and over-voltage protection."+        "description": "Non-inverting differential driver output to the RS-485/RS-422 bus. Differential swing VOD ≥ 1.5V into RL = 54Ω. ±15kV HBM ESD protected. Includes short-circuit and over-voltage protection."       },       {         "number": "6",         "name": "Z",         "type": "output",-        "description": "Inverting differential driver output to the RS-485/RS-422 bus. Complementary to Y. \u00b115kV HBM ESD protected; short-circuit and over-voltage protected."+        "description": "Inverting differential driver output to the RS-485/RS-422 bus. Complementary to Y. ±15kV HBM ESD protected; short-circuit and over-voltage protected."       },       {         "number": "7",         "name": "B",         "type": "input",-        "description": "Inverting differential receiver input from the RS-485/RS-422 bus. 1/8 unit-load, RIN \u2248 96k\u03a9. Common-mode range \u22127V to +12V. \u00b115kV HBM ESD."+        "description": "Inverting differential receiver input from the RS-485/RS-422 bus. 1/8 unit-load, RIN ≈ 96kΩ. Common-mode range −7V to +12V. ±15kV HBM ESD."       },       {         "number": "8",         "name": "A",         "type": "input",-        "description": "Non-inverting differential receiver input from the RS-485/RS-422 bus. 1/8 unit-load, RIN \u2248 96k\u03a9. Common-mode range \u22127V to +12V. \u00b115kV HBM ESD."+        "description": "Non-inverting differential receiver input from the RS-485/RS-422 bus. 1/8 unit-load, RIN ≈ 96kΩ. Common-mode range −7V to +12V. ±15kV HBM ESD."       }     ],     "provenance": {@@ -150,9 +150,9 @@     "docs/hero.png",     "docs/sit3490eesa-datasheet.pdf",     "viewers/symbol.html",-    "viewers/footprint.html"+    "viewers/footprint.html",+    "pads.json"   ],-  "visibility": {-    "public": true-  }+  "visibility": "public",+  "description": "SIT RS-485 / RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D." }\ No newline at end of file