SN74HC148

@@ -1,8 +1,11 @@ {+  "schema_version": 1,+  "type": "component",   "slug": "sn74hc148",+  "title": "SN74HC148",+  "brief": "TI 8-to-3 line priority encoder, SOIC-16. Encodes highest active input to 3-bit binary, cascadable. HC 2-6 V. Datasheet-verified.",   "version": "0.1.0",-  "type": "component",-  "description": "TI 8-to-3 line priority encoder, SOIC-16. Encodes highest active input to 3-bit binary, cascadable. HC 2-6 V. Datasheet-verified.",+  "license": "CC-BY-SA-4.0",   "tags": [     "component",     "logic",@@ -12,6 +15,170 @@     "soic-16",     "texas-instruments"   ],+  "component": {+    "mpn": "SN74HC148",+    "manufacturer": "Texas Instruments",+    "package": "SOIC-16",+    "pin_count": 16,+    "category": "Logic IC",+    "subcategory": "8-to-3 priority encoder",+    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc148.pdf",+    "parts": {+      "symbol": "sn74hc148.kicad_sym",+      "footprint": "sn74hc148.kicad_mod",+      "model_3d": "sn74hc148.glb"+    },+    "distributor_links": {},+    "pins": [+      {+        "number": "1",+        "name": "4",+        "type": "input",+        "description": "Active-low data input 4. Requests encoding of octal value 4 when asserted (LOW)."+      },+      {+        "number": "2",+        "name": "5",+        "type": "input",+        "description": "Active-low data input 5. Requests encoding of octal value 5 when asserted (LOW)."+      },+      {+        "number": "3",+        "name": "6",+        "type": "input",+        "description": "Active-low data input 6. Requests encoding of octal value 6 when asserted (LOW)."+      },+      {+        "number": "4",+        "name": "7",+        "type": "input",+        "description": "Active-low data input 7 (highest priority). Requests encoding of octal value 7 when asserted (LOW)."+      },+      {+        "number": "5",+        "name": "EI",+        "type": "input",+        "description": "Active-low enable input. All outputs are forced to their inactive (HIGH) state when EI is HIGH; encoding is enabled when EI is LOW. Used for cascading multiple stages."+      },+      {+        "number": "6",+        "name": "A2",+        "type": "output",+        "description": "Active-low encoded output bit 2 (MSB of the 3-bit octal code). Drives \u00b14 mA at Vcc = 5 V."+      },+      {+        "number": "7",+        "name": "A1",+        "type": "output",+        "description": "Active-low encoded output bit 1. Drives \u00b14 mA at Vcc = 5 V."+      },+      {+        "number": "8",+        "name": "GND",+        "type": "power_in",+        "description": "Ground reference (0 V)."+      },+      {+        "number": "9",+        "name": "A0",+        "type": "output",+        "description": "Active-low encoded output bit 0 (LSB of the 3-bit octal code). Drives \u00b14 mA at Vcc = 5 V."+      },+      {+        "number": "10",+        "name": "0",+        "type": "input",+        "description": "Active-low data input 0 (lowest priority). Requests encoding of octal value 0 when asserted (LOW) and no higher-numbered input is active."+      },+      {+        "number": "11",+        "name": "1",+        "type": "input",+        "description": "Active-low data input 1. Requests encoding of octal value 1 when asserted (LOW)."+      },+      {+        "number": "12",+        "name": "2",+        "type": "input",+        "description": "Active-low data input 2. Requests encoding of octal value 2 when asserted (LOW)."+      },+      {+        "number": "13",+        "name": "3",+        "type": "input",+        "description": "Active-low data input 3. Requests encoding of octal value 3 when asserted (LOW)."+      },+      {+        "number": "14",+        "name": "GS",+        "type": "output",+        "description": "Active-low group-select output. Goes LOW whenever any data input (0-7) is active and EI is LOW, indicating that a valid encoded value is present on A0-A2."+      },+      {+        "number": "15",+        "name": "EO",+        "type": "output",+        "description": "Active-low enable output. Goes LOW when EI is LOW and no data input is asserted, signaling downstream cascaded encoders that they may drive the outputs."+      },+      {+        "number": "16",+        "name": "VCC",+        "type": "power_in",+        "description": "Positive supply, 2 V to 6 V (5 V nominal). Icc max 80 \u00b5A."+      }+    ],+    "provenance": {+      "extractor": "ds2sf",+      "datasheet": {+        "url": "https://www.ti.com/lit/ds/symlink/sn74hc148.pdf",+        "pages": 25,+        "sha256": "ca65b15c3841afab",+        "source_tier": "mfr"+      },+      "cad": "KiCad official (CC-BY-SA 4.0)",+      "pins": {+        "total": 16,+        "described": 16,+        "cites_pages": true,+        "refuses_to_fabricate": true+      }+    },+    "viewers": {+      "symbol": "viewers/symbol.html",+      "footprint": "viewers/footprint.html"+    }+  },+  "metadata": {+    "specs": {+      "Type": "8-to-3 priority encoder",+      "Inputs": "8 active-low (0-7)",+      "Outputs": "3-bit binary (A0-A2, active-low)",+      "Priority": "highest active input wins",+      "Cascade": "EI / EO / GS pins",+      "Logic family": "HC (high-speed CMOS)",+      "Supply voltage": "2-6 V",+      "Package": "SOIC-16"+    }+  },+  "sections": [+    "hero",+    "viewers",+    "readme",+    "breadcrumbs",+    "info"+  ],+  "discovery_triggers": [+    "sn74hc148",+    "74hc148",+    "priority encoder",+    "8 to 3 encoder",+    "interrupt encoder"+  ],+  "discovery_pitch": "SN74HC148 8-to-3 line priority encoder (SOIC-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  },   "dependencies": {},   "hero": {     "type": "image",@@ -27,10 +194,5 @@     "docs/sn74hc148-datasheet.pdf",     "viewers/symbol.html",     "viewers/footprint.html"-  ],-  "visibility": "public",-  "author": {-    "name": "Ray",-    "email": "[email protected]"-  }+  ] }\ No newline at end of file