component
SN74HC21DR
Public Made by Adomby adom
Texas Instruments Gates, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.md+14@@ -48,6 +48,20 @@ SN74HC21DR from Texas Instruments, in a SOIC-14. Pinout and pin descriptions ext - Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm` - 3D model: SOIC-14 (KiCad packages3D, STEP) +## 3D model downloads++Two STEP files. Same geometry, different body top:++| File | Size | Use it when |+|---|---|---|+| [`sn74hc21dr.step`](sn74hc21dr.step) | 195 KB | You want the bare part, or you mark your own boards. |+| [`sn74hc21dr-etched.step`](sn74hc21dr-etched.step) | 2.2 MB | You want the part with `SN74HC21DR` already on it. |++The marking in the etched file is real recessed geometry cut into the solid, not a+texture or a decal: 558 faces against 237 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:
package.json+1−1@@ -1,6 +1,6 @@ { "slug": "sn74hc21dr",- "version": "0.1.0",+ "version": "0.2.0", "type": "component", "description": "Texas Instruments Gates, SOIC-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.", "tags": [
page.json+9−9@@ -4,7 +4,7 @@ "slug": "sn74hc21dr", "title": "SN74HC21DR", "brief": "Texas Instruments Gates, SOIC-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.",- "version": "0.1.0",+ "version": "0.2.0", "license": "CC-BY-SA-4.0", "tags": [ "component",@@ -36,7 +36,7 @@ "number": "1", "name": "1A", "type": "input",- "description": "Channel 1, Input A. CMOS logic input to gate 1 (VIH \u2265 3.15 V @ VCC = 4.5 V; VIL \u2264 1.35 V @ VCC = 4.5 V)."+ "description": "Channel 1, Input A. CMOS logic input to gate 1 (VIH ≥ 3.15 V @ VCC = 4.5 V; VIL ≤ 1.35 V @ VCC = 4.5 V)." }, { "number": "2",@@ -66,7 +66,7 @@ "number": "6", "name": "1Y", "type": "output",- "description": "Channel 1, Output Y. 1Y = 1A \u00b7 1B \u00b7 1C \u00b7 1D. CMOS push-pull output; IOL/IOH up to \u00b15.2 mA at VCC = 6 V."+ "description": "Channel 1, Output Y. 1Y = 1A · 1B · 1C · 1D. CMOS push-pull output; IOL/IOH up to ±5.2 mA at VCC = 6 V." }, { "number": "7",@@ -78,7 +78,7 @@ "number": "8", "name": "2Y", "type": "output",- "description": "Channel 2, Output Y. 2Y = 2A \u00b7 2B \u00b7 2C \u00b7 2D. CMOS push-pull output; IOL/IOH up to \u00b15.2 mA at VCC = 6 V."+ "description": "Channel 2, Output Y. 2Y = 2A · 2B · 2C · 2D. CMOS push-pull output; IOL/IOH up to ±5.2 mA at VCC = 6 V." }, { "number": "9",@@ -114,7 +114,7 @@ "number": "14", "name": "VCC", "type": "power_in",- "description": "Positive supply, 2 V to 6 V (absolute maximum 7 V). Bypass with a 0.1 \u00b5F ceramic capacitor to GND close to the pin."+ "description": "Positive supply, 2 V to 6 V (absolute maximum 7 V). Bypass with a 0.1 µF ceramic capacitor to GND close to the pin." } ], "provenance": {@@ -188,9 +188,9 @@ "docs/hero.png", "docs/sn74hc21dr-datasheet.pdf", "viewers/symbol.html",- "viewers/footprint.html"+ "viewers/footprint.html",+ "pads.json" ],- "visibility": {- "public": true- }+ "visibility": "public",+ "description": "Texas Instruments Gates, SOIC-14. Datasheet-verified pinout, KiCad symbol/footprint/3D." }