CD74HCT243M

@@ -80,55 +80,55 @@         "number": "3",         "name": "A0",         "type": "bidirectional",-        "description": "Port A channel 0 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA \u2260 OEB."+        "description": "Port A channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."       },       {         "number": "4",         "name": "A1",         "type": "bidirectional",-        "description": "Port A channel 1 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA \u2260 OEB."+        "description": "Port A channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."       },       {         "number": "5",         "name": "A2",         "type": "bidirectional",-        "description": "Port A channel 2 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA \u2260 OEB."+        "description": "Port A channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."       },       {         "number": "6",         "name": "A3",         "type": "bidirectional",-        "description": "Port A channel 3 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA \u2260 OEB."+        "description": "Port A channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."       },       {         "number": "7",         "name": "GND",         "type": "power_in",-        "description": "Ground reference; continuous current through GND pin must not exceed \u00b170 mA."+        "description": "Ground reference; continuous current through GND pin must not exceed ±70 mA."       },       {         "number": "8",         "name": "B3",         "type": "bidirectional",-        "description": "Port B channel 3 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA \u2260 OEB."+        "description": "Port B channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."       },       {         "number": "9",         "name": "B2",         "type": "bidirectional",-        "description": "Port B channel 2 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA \u2260 OEB."+        "description": "Port B channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."       },       {         "number": "10",         "name": "B1",         "type": "bidirectional",-        "description": "Port B channel 1 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA \u2260 OEB."+        "description": "Port B channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."       },       {         "number": "11",         "name": "B0",         "type": "bidirectional",-        "description": "Port B channel 0 bidirectional tri-state I/O; drives as output (VOH \u2265 3.84 V, VOL \u2264 0.33 V at IOH = \u22126 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA \u2260 OEB."+        "description": "Port B channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."       },       {         "number": "12",@@ -146,7 +146,7 @@         "number": "14",         "name": "VCC",         "type": "power_in",-        "description": "Positive supply voltage; HCT type: 4.5 V to 5.5 V recommended operating range; continuous current through VCC must not exceed \u00b170 mA."+        "description": "Positive supply voltage; HCT type: 4.5 V to 5.5 V recommended operating range; continuous current through VCC must not exceed ±70 mA."       }     ],     "provenance": {@@ -183,6 +183,46 @@     "viewers": {       "symbol": "viewers/symbol.html",       "footprint": "viewers/footprint.html"-    }+    },+    "models_3d": [+      {+        "file": "cd74hct243m.step",+        "role": "plain",+        "up": "Z",+        "units": "mm",+        "origin": "footprint origin = pad-pattern centre",+        "seat": "z = 0",+        "extents_mm": [+          6.0,+          8.7,+          1.75+        ],+        "zmin_mm": -0.0,+        "centre_offset_mm": 0.0,+        "footprint_binding": "identity",+        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",+        "checked": "2026-10-07",+        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+      },+      {+        "file": "cd74hct243m-etched.step",+        "role": "eda",+        "up": "Z",+        "units": "mm",+        "origin": "footprint origin = pad-pattern centre",+        "seat": "z = 0",+        "extents_mm": [+          6.0,+          8.7,+          1.75+        ],+        "zmin_mm": -0.0,+        "centre_offset_mm": 0.0,+        "footprint_binding": "identity",+        "sha256": "da234e0990a2325ec8f76de40aa807f2f262e4d2e740944c5ed9933fd30157d2",+        "checked": "2026-10-07",+        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+      }+    ]   }-}\ No newline at end of file+}