SN74HCT74DR

@@ -53,13 +53,13 @@         "number": "1",         "name": "1CLR",         "type": "input",-        "description": "Active-low asynchronous clear for flip-flop 1; drives Q1=L, Q\u03041=H regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."+        "description": "Active-low asynchronous clear for flip-flop 1; drives Q1=L, Q̄1=H regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."       },       {         "number": "2",         "name": "1D",         "type": "input",-        "description": "Data input for flip-flop 1; captured on the positive-going CLK edge when PRE and CLR are inactive (high); setup time \u2265 12 ns, hold time \u2265 0 ns at VCC = 4.5 V."+        "description": "Data input for flip-flop 1; captured on the positive-going CLK edge when PRE and CLR are inactive (high); setup time ≥ 12 ns, hold time ≥ 0 ns at VCC = 4.5 V."       },       {         "number": "3",@@ -71,43 +71,43 @@         "number": "4",         "name": "1PRE",         "type": "input",-        "description": "Active-low asynchronous preset for flip-flop 1; drives Q1=H, Q\u03041=L regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."+        "description": "Active-low asynchronous preset for flip-flop 1; drives Q1=H, Q̄1=L regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."       },       {         "number": "5",         "name": "1Q",         "type": "output",-        "description": "Non-inverting output of flip-flop 1; VOH \u2265 3.98 V at IOH = \u22124 mA, VOL \u2264 0.26 V at IOL = 4 mA (VCC = 4.5 V); tpd 28 ns typ from CLK at 4.5 V."+        "description": "Non-inverting output of flip-flop 1; VOH ≥ 3.98 V at IOH = −4 mA, VOL ≤ 0.26 V at IOL = 4 mA (VCC = 4.5 V); tpd 28 ns typ from CLK at 4.5 V."       },       {         "number": "6",         "name": "~{1Q}",         "type": "output",-        "description": "Inverting (complementary) output of flip-flop 1; always the logical complement of 1Q; same drive ratings as 1Q (VOH \u2265 3.98 V at IOH = \u22124 mA, VOL \u2264 0.26 V at IOL = 4 mA)."+        "description": "Inverting (complementary) output of flip-flop 1; always the logical complement of 1Q; same drive ratings as 1Q (VOH ≥ 3.98 V at IOH = −4 mA, VOL ≤ 0.26 V at IOL = 4 mA)."       },       {         "number": "7",         "name": "GND",         "type": "power_in",-        "description": "Ground supply reference (0 V); continuous current through GND pin \u00b150 mA maximum."+        "description": "Ground supply reference (0 V); continuous current through GND pin ±50 mA maximum."       },       {         "number": "8",         "name": "~{2Q}",         "type": "output",-        "description": "Inverting (complementary) output of flip-flop 2; always the logical complement of 2Q; VOH \u2265 3.98 V at IOH = \u22124 mA, VOL \u2264 0.26 V at IOL = 4 mA (VCC = 4.5 V)."+        "description": "Inverting (complementary) output of flip-flop 2; always the logical complement of 2Q; VOH ≥ 3.98 V at IOH = −4 mA, VOL ≤ 0.26 V at IOL = 4 mA (VCC = 4.5 V)."       },       {         "number": "9",         "name": "2Q",         "type": "output",-        "description": "Non-inverting output of flip-flop 2; VOH \u2265 3.98 V at IOH = \u22124 mA, VOL \u2264 0.26 V at IOL = 4 mA (VCC = 4.5 V); tpd 28 ns typ from CLK at 4.5 V."+        "description": "Non-inverting output of flip-flop 2; VOH ≥ 3.98 V at IOH = −4 mA, VOL ≤ 0.26 V at IOL = 4 mA (VCC = 4.5 V); tpd 28 ns typ from CLK at 4.5 V."       },       {         "number": "10",         "name": "2PRE",         "type": "input",-        "description": "Active-low asynchronous preset for flip-flop 2; drives Q2=H, Q\u03042=L regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."+        "description": "Active-low asynchronous preset for flip-flop 2; drives Q2=H, Q̄2=L regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."       },       {         "number": "11",@@ -119,19 +119,19 @@         "number": "12",         "name": "2D",         "type": "input",-        "description": "Data input for flip-flop 2; captured on the positive-going CLK edge when PRE and CLR are inactive (high); setup time \u2265 12 ns, hold time \u2265 0 ns at VCC = 4.5 V."+        "description": "Data input for flip-flop 2; captured on the positive-going CLK edge when PRE and CLR are inactive (high); setup time ≥ 12 ns, hold time ≥ 0 ns at VCC = 4.5 V."       },       {         "number": "13",         "name": "2CLR",         "type": "input",-        "description": "Active-low asynchronous clear for flip-flop 2; drives Q2=L, Q\u03042=H regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."+        "description": "Active-low asynchronous clear for flip-flop 2; drives Q2=L, Q̄2=H regardless of other inputs; minimum pulse width 16 ns at VCC = 4.5 V."       },       {         "number": "14",         "name": "VCC",         "type": "power_in",-        "description": "Positive supply voltage; recommended operating range 4.5 V to 5.5 V; quiescent ICC max 40 \u03bcA at VCC = 5.5 V."+        "description": "Positive supply voltage; recommended operating range 4.5 V to 5.5 V; quiescent ICC max 40 μA at VCC = 5.5 V."       }     ],     "provenance": {@@ -168,6 +168,46 @@     "viewers": {       "symbol": "viewers/symbol.html",       "footprint": "viewers/footprint.html"-    }+    },+    "models_3d": [+      {+        "file": "sn74hct74dr.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": "sn74hct74dr-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": "250a53fc2a6ebdf3b6d66432b6da6e01ed6936284f15e443d08b80990a472a9f",+        "checked": "2026-10-07",+        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+      }+    ]   }-}\ No newline at end of file+}