component
SN74HC74
Public Made by Adomby adom
TI dual D-type positive-edge flip-flop, SOIC-14. Async preset/clear, HC CMOS, 2-6 V. Datasheet-verified.
← Commit history
component page: CAD + datasheet-first provenance
2 files changed
+158−9
README.md+1−1@@ -52,7 +52,7 @@ Two independent D-type positive-edge-triggered flip-flops in high-speed CMOS, in Data extracted from the manufacturer datasheet, not a distributor listing: - **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74hc74.pdf) (41 pp, sha256 `a60d59528e97fe91`, retrieved 2026-08-17, tier: manufacturer)-- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - **CAD:** KiCad official libraries (CC-BY-SA 4.0). [Datasheet PDF](docs/sn74hc74-datasheet.pdf)
page.json+157−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "sn74hc74",+ "title": "SN74HC74",+ "brief": "TI dual D-type positive-edge flip-flop, SOIC-14. Async preset/clear, HC CMOS, 2-6 V. Datasheet-verified.", "version": "0.1.0",- "type": "component",- "description": "TI dual D-type positive-edge flip-flop, SOIC-14. Async preset/clear, HC CMOS, 2-6 V. Datasheet-verified.",+ "license": "CC-BY-SA-4.0", "tags": [ "component", "logic",@@ -12,6 +15,157 @@ "soic-14", "texas-instruments" ],+ "component": {+ "mpn": "SN74HC74",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-14",+ "pin_count": 14,+ "category": "Logic IC",+ "subcategory": "Dual D flip-flop",+ "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc74.pdf",+ "parts": {+ "symbol": "sn74hc74.kicad_sym",+ "footprint": "sn74hc74.kicad_mod",+ "model_3d": "sn74hc74.glb"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "1CLR",+ "type": "input",+ "description": "Channel 1 asynchronous clear input, active low. Driving low forces 1Q low and 1Q\u0304 high regardless of CLK/D. VIL \u2264 1.35 V @ VCC=4.5 V; input clamp current \u00b120 mA max."+ },+ {+ "number": "2",+ "name": "1D",+ "type": "input",+ "description": "Channel 1 data input; sampled on the rising edge of 1CLK. Setup time 20 ns typ @ VCC=4.5 V, hold time 0 ns."+ },+ {+ "number": "3",+ "name": "1CLK",+ "type": "input",+ "description": "Channel 1 positive-edge-triggered clock input. Maximum clock frequency 31 MHz @ VCC=4.5 V, 36 MHz @ VCC=6 V."+ },+ {+ "number": "4",+ "name": "1PRE",+ "type": "input",+ "description": "Channel 1 asynchronous preset input, active low. Driving low forces 1Q high and 1Q\u0304 low regardless of CLK/D. Minimum pulse width 20 ns @ VCC=4.5 V."+ },+ {+ "number": "5",+ "name": "1Q",+ "type": "output",+ "description": "Channel 1 flip-flop output. Follows 1D at the rising edge of 1CLK. VOH \u2265 3.98 V @ IOH=-4 mA, VCC=4.5 V; propagation delay 20 ns typ from CLK."+ },+ {+ "number": "6",+ "name": "1Q\u0304",+ "type": "output",+ "description": "Channel 1 inverted flip-flop output, complement of 1Q."+ },+ {+ "number": "7",+ "name": "GND",+ "type": "power_in",+ "description": "Device ground reference (0 V)."+ },+ {+ "number": "8",+ "name": "2Q\u0304",+ "type": "output",+ "description": "Channel 2 inverted flip-flop output, complement of 2Q."+ },+ {+ "number": "9",+ "name": "2Q",+ "type": "output",+ "description": "Channel 2 flip-flop output. Follows 2D at the rising edge of 2CLK."+ },+ {+ "number": "10",+ "name": "2PRE",+ "type": "input",+ "description": "Channel 2 asynchronous preset input, active low. Driving low forces 2Q high and 2Q\u0304 low regardless of CLK/D."+ },+ {+ "number": "11",+ "name": "2CLK",+ "type": "input",+ "description": "Channel 2 positive-edge-triggered clock input."+ },+ {+ "number": "12",+ "name": "2D",+ "type": "input",+ "description": "Channel 2 data input; sampled on the rising edge of 2CLK."+ },+ {+ "number": "13",+ "name": "2CLR",+ "type": "input",+ "description": "Channel 2 asynchronous clear input, active low. Driving low forces 2Q low and 2Q\u0304 high regardless of CLK/D."+ },+ {+ "number": "14",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply. Operating range 2 V to 6 V (nom 5 V); absolute max 7 V. ICC \u2264 40 \u00b5A over temperature."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/sn74hc74.pdf",+ "pages": 41,+ "sha256": "a60d59528e97fe91",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 14,+ "described": 14,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Type": "Dual D-type flip-flop",+ "Trigger": "Positive (rising) clock edge",+ "Async controls": "PRE + CLR (active-low)",+ "Outputs": "Q + Q (complementary)",+ "Logic family": "HC (high-speed CMOS)",+ "Supply voltage": "2-6 V",+ "Package": "SOIC-14",+ "Body (L\u00d7W\u00d7H)": "8.65 \u00d7 3.9 \u00d7 1.75 mm"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "sn74hc74",+ "74hc74",+ "dual d flip-flop",+ "d-type flip flop"+ ],+ "discovery_pitch": "SN74HC74 dual D-type positive-edge-triggered flip-flop (SOIC-14) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -27,10 +181,5 @@ "docs/sn74hc74-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }