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CY74FCT821CTQCT
Public Made by Adomby adom
Texas Instruments Flip Flops, QSOP-24-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+60@@ -0,0 +1,60 @@+# CY74FCT821CTQCT++**Texas Instruments** · Flip Flops · QSOP-24-150mil++CY74FCT821CTQCT from Texas Instruments, in a QSOP-24-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | OE | input | Output enable: when OE is high the Y outputs are forced to the high-impedance state, and when OE is low the true register data is present at the Y outputs. |+| 2 | D0 | input | D flip-flop data input 0, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 3 | D1 | input | D flip-flop data input 1, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 4 | D2 | input | D flip-flop data input 2, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 5 | D3 | input | D flip-flop data input 3, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 6 | D4 | input | D flip-flop data input 4, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 7 | D5 | input | D flip-flop data input 5, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 8 | D6 | input | D flip-flop data input 6, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 9 | D7 | input | D flip-flop data input 7, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 10 | D8 | input | D flip-flop data input 8, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 11 | D9 | input | D flip-flop data input 9, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs. |+| 12 | GND | power_in | Ground reference for the device. |+| 13 | CP | input | Clock pulse for the register: data is entered into the register on the low-to-high clock transition; CT minimum pulse duration is 6 ns. |+| 14 | Y9 | tri_state | Register 3-state output 9, high-impedance when OE is high. |+| 15 | Y8 | tri_state | Register 3-state output 8, high-impedance when OE is high. |+| 16 | Y7 | tri_state | Register 3-state output 7, high-impedance when OE is high. |+| 17 | Y6 | tri_state | Register 3-state output 6, high-impedance when OE is high. |+| 18 | Y5 | tri_state | Register 3-state output 5, high-impedance when OE is high. |+| 19 | Y4 | tri_state | Register 3-state output 4, high-impedance when OE is high. |+| 20 | Y3 | tri_state | Register 3-state output 3, high-impedance when OE is high. |+| 21 | Y2 | tri_state | Register 3-state output 2, high-impedance when OE is high. |+| 22 | Y1 | tri_state | Register 3-state output 1, high-impedance when OE is high. |+| 23 | Y0 | tri_state | Register 3-state output 0, high-impedance when OE is high; the datasheet specifies IOL up to 64 mA and IOH up to -32 mA for the outputs. |+| 24 | VCC | power_in | Supply voltage, 4.75 V minimum to 5.25 V maximum (5 V nominal). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | QSOP-24-150mil |+| Category | Logic |+| Pins | 24 |++## CAD (KiCad official)++- Symbol: `CY74FCT821CTQCT`+- Footprint: `Package_SO:QSOP-24_3.9x8.7mm_P0.635mm`+- 3D model: QSOP-24-150mil (KiCad packages3D, STEP)+- 3D model files: `cy74fct821ctqct-etched.step` / `cy74fct821ctqct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cy74fct821ctqct.step` / `cy74fct821ctqct.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/cy74fct821t) (14 pp, sha256 `5826866e972c5a41`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cy74fct821ctqct-datasheet.pdf)
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Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "cy74fct821ctqct",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "cy74fct821ctqct.kicad_sym",+ "cy74fct821ctqct.kicad_mod",+ "cy74fct821ctqct.glb",+ "cy74fct821ctqct.step",+ "cy74fct821ctqct.lbr",+ "docs/hero.png",+ "docs/cy74fct821ctqct-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "cy74fct821ctqct-hero.glb",+ "cy74fct821ctqct-hero.overlay.json"+ ],+ "component": {+ "mpn": "CY74FCT821CTQCT",+ "manufacturer": "Texas Instruments",+ "package": "QSOP-24-150mil",+ "pin_count": 24,+ "category": "Logic",+ "subcategory": "Flip Flops",+ "datasheet": "https://www.ti.com/cn/lit/gpn/cy74fct821t",+ "parts": {+ "symbol": "cy74fct821ctqct.kicad_sym",+ "footprint": "cy74fct821ctqct.kicad_mod",+ "model_3d": "cy74fct821ctqct-hero.glb",+ "model_3d_plain": "cy74fct821ctqct.glb",+ "model_3d_step": "cy74fct821ctqct-etched.step",+ "model_3d_step_plain": "cy74fct821ctqct.step",+ "lbr": "cy74fct821ctqct.lbr"+ },+ "distributor_links": {+ "lcsc": "C2873071",+ "digikey": "296-14585-2-ND",+ "mouser": "595-CY74FCT821CTQCT"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T17:07:34Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-14585-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-CY74FCT821CTQCT",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "OE",+ "type": "input",+ "description": "Output enable: when OE is high the Y outputs are forced to the high-impedance state, and when OE is low the true register data is present at the Y outputs."+ },+ {+ "number": "2",+ "name": "D0",+ "type": "input",+ "description": "D flip-flop data input 0, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "3",+ "name": "D1",+ "type": "input",+ "description": "D flip-flop data input 1, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "4",+ "name": "D2",+ "type": "input",+ "description": "D flip-flop data input 2, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "5",+ "name": "D3",+ "type": "input",+ "description": "D flip-flop data input 3, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "6",+ "name": "D4",+ "type": "input",+ "description": "D flip-flop data input 4, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "7",+ "name": "D5",+ "type": "input",+ "description": "D flip-flop data input 5, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "8",+ "name": "D6",+ "type": "input",+ "description": "D flip-flop data input 6, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "9",+ "name": "D7",+ "type": "input",+ "description": "D flip-flop data input 7, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "10",+ "name": "D8",+ "type": "input",+ "description": "D flip-flop data input 8, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "11",+ "name": "D9",+ "type": "input",+ "description": "D flip-flop data input 9, captured on the low-to-high transition of CP; the datasheet gives VIH min 2 V and VIL max 0.8 V for inputs."+ },+ {+ "number": "12",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference for the device."+ },+ {+ "number": "13",+ "name": "CP",+ "type": "input",+ "description": "Clock pulse for the register: data is entered into the register on the low-to-high clock transition; CT minimum pulse duration is 6 ns."+ },+ {+ "number": "14",+ "name": "Y9",+ "type": "tri_state",+ "description": "Register 3-state output 9, high-impedance when OE is high."+ },+ {+ "number": "15",+ "name": "Y8",+ "type": "tri_state",+ "description": "Register 3-state output 8, high-impedance when OE is high."+ },+ {+ "number": "16",+ "name": "Y7",+ "type": "tri_state",+ "description": "Register 3-state output 7, high-impedance when OE is high."+ },+ {+ "number": "17",+ "name": "Y6",+ "type": "tri_state",+ "description": "Register 3-state output 6, high-impedance when OE is high."+ },+ {+ "number": "18",+ "name": "Y5",+ "type": "tri_state",+ "description": "Register 3-state output 5, high-impedance when OE is high."+ },+ {+ "number": "19",+ "name": "Y4",+ "type": "tri_state",+ "description": "Register 3-state output 4, high-impedance when OE is high."+ },+ {+ "number": "20",+ "name": "Y3",+ "type": "tri_state",+ "description": "Register 3-state output 3, high-impedance when OE is high."+ },+ {+ "number": "21",+ "name": "Y2",+ "type": "tri_state",+ "description": "Register 3-state output 2, high-impedance when OE is high."+ },+ {+ "number": "22",+ "name": "Y1",+ "type": "tri_state",+ "description": "Register 3-state output 1, high-impedance when OE is high."+ },+ {+ "number": "23",+ "name": "Y0",+ "type": "tri_state",+ "description": "Register 3-state output 0, high-impedance when OE is high; the datasheet specifies IOL up to 64 mA and IOH up to -32 mA for the outputs."+ },+ {+ "number": "24",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 4.75 V minimum to 5.25 V maximum (5 V nominal)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The datasheet's pin description table and switching-table I/O column label CP and Y as 'O' (output).; The pinout is taken from the shared 'P, Q, OR SO PACKAGE (TOP VIEW)' drawing on page 1. The text doe; The datasheet gives no per-pin electrical limits for D0-D9 beyond the device-wide VIH/VIL and the se"+ ],+ "pages_sent": 14,+ "cost_usd": 0.0775,+ "at": "2026-10-08T17:07:12"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/cy74fct821t",+ "pages": 14,+ "sha256": "5826866e972c5a41",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 24,+ "described": 24,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "cy74fct821ctqct.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 8.65,+ 1.72+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d2244e3f2eff53b6985f22b8c8a44bb319a1973a6a440b2597d6d67813b09338",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "cy74fct821ctqct-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 8.65,+ 1.72+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "4672061ef5cde2d3b6f6b63e43c6c3d621e7805cc3ab61b434017eb3cf999fb0",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}