component
SN74ALVCH16721DLR
Public Made by Adomby adom
Texas Instruments Flip Flops, SSOP-56-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+92@@ -0,0 +1,92 @@+# SN74ALVCH16721DLR++**Texas Instruments** · Flip Flops · SSOP-56-300mil++SN74ALVCH16721DLR from Texas Instruments, in a SSOP-56-300mil. 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 | Buffered output enable that puts the 20 outputs in a normal logic state or high-impedance state; tie to VCC through a pullup resistor to ensure high-impedance during power up or power down. |+| 2 | Q1 | tri_state | 3-state output of flip-flop 1. |+| 3 | Q2 | tri_state | 3-state output of flip-flop 2. |+| 4 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 5 | Q3 | tri_state | 3-state output of flip-flop 3. |+| 6 | Q4 | tri_state | 3-state output of flip-flop 4. |+| 7 | VCC | power_in | Supply voltage, 1.65 V to 3.6 V recommended. |+| 8 | Q5 | tri_state | 3-state output of flip-flop 5. |+| 9 | Q6 | tri_state | 3-state output of flip-flop 6. |+| 10 | Q7 | tri_state | 3-state output of flip-flop 7. |+| 11 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 12 | Q8 | tri_state | 3-state output of flip-flop 8. |+| 13 | Q9 | tri_state | 3-state output of flip-flop 9. |+| 14 | Q10 | tri_state | 3-state output of flip-flop 10. |+| 15 | Q11 | tri_state | 3-state output of flip-flop 11. |+| 16 | Q12 | tri_state | 3-state output of flip-flop 12. |+| 17 | Q13 | tri_state | 3-state output of flip-flop 13. |+| 18 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 19 | Q14 | tri_state | 3-state output of flip-flop 14. |+| 20 | Q15 | tri_state | 3-state output of flip-flop 15. |+| 21 | Q16 | tri_state | 3-state output of flip-flop 16. |+| 22 | VCC | power_in | Supply voltage, 1.65 V to 3.6 V recommended. |+| 23 | Q17 | tri_state | 3-state output of flip-flop 17. |+| 24 | Q18 | tri_state | 3-state output of flip-flop 18. |+| 25 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 26 | Q19 | tri_state | 3-state output of flip-flop 19. |+| 27 | Q20 | tri_state | 3-state output of flip-flop 20. |+| 28 | NC | unconnected | No internal connection. |+| 29 | CLKEN | input | Clock enable; when low, data is stored on the positive CLK transition, and when high no data is stored. |+| 30 | D20 | input | Data input for flip-flop 20 with bus hold. |+| 31 | D19 | input | Data input for flip-flop 19 with bus hold. |+| 32 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 33 | D18 | input | Data input for flip-flop 18 with bus hold. |+| 34 | D17 | input | Data input for flip-flop 17 with bus hold. |+| 35 | VCC | power_in | Supply voltage, 1.65 V to 3.6 V recommended. |+| 36 | D16 | input | Data input for flip-flop 16 with bus hold. |+| 37 | D15 | input | Data input for flip-flop 15 with bus hold. |+| 38 | D14 | input | Data input for flip-flop 14 with bus hold. |+| 39 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 40 | D13 | input | Data input for flip-flop 13 with bus hold. |+| 41 | D12 | input | Data input for flip-flop 12 with bus hold. |+| 42 | D11 | input | Data input for flip-flop 11 with bus hold. |+| 43 | D10 | input | Data input for flip-flop 10 with bus hold. |+| 44 | D9 | input | Data input for flip-flop 9 with bus hold. |+| 45 | D8 | input | Data input for flip-flop 8 with bus hold. |+| 46 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 47 | D7 | input | Data input for flip-flop 7 with bus hold. |+| 48 | D6 | input | Data input for flip-flop 6 with bus hold. |+| 49 | D5 | input | Data input for flip-flop 5 with bus hold. |+| 50 | VCC | power_in | Supply voltage, 1.65 V to 3.6 V recommended. |+| 51 | D4 | input | Data input for flip-flop 4 with bus hold. |+| 52 | D3 | input | Data input for flip-flop 3 with bus hold. |+| 53 | GND | power_in | Ground; continuous current through each VCC or GND is limited to ±100 mA. |+| 54 | D2 | input | Data input for flip-flop 2 with bus hold. |+| 55 | D1 | input | Data input for flip-flop 1 with bus hold. |+| 56 | CLK | input | Clock input; data is stored on the positive transition when CLKEN is low. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SSOP-56-300mil |+| Category | Logic |+| Pins | 56 |++## CAD (KiCad official)++- Symbol: `SN74ALVCH16721DLR`+- Footprint: `Package_SO:SSOP-56_7.5x18.5mm_P0.635mm`+- 3D model: SSOP-56-300mil (KiCad packages3D, STEP)+- 3D model files: `sn74alvch16721dlr-etched.step` / `sn74alvch16721dlr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74alvch16721dlr.step` / `sn74alvch16721dlr.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/sn74alvch16721) (18 pp, sha256 `dec914c4a56319a2`, retrieved 2026-10-07, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/sn74alvch16721dlr-datasheet.pdf)
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tie to VCC through a pullup resistor to ensure high-impedance during power up or power down."+ },+ {+ "number": "2",+ "name": "Q1",+ "type": "tri_state",+ "description": "3-state output of flip-flop 1."+ },+ {+ "number": "3",+ "name": "Q2",+ "type": "tri_state",+ "description": "3-state output of flip-flop 2."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "5",+ "name": "Q3",+ "type": "tri_state",+ "description": "3-state output of flip-flop 3."+ },+ {+ "number": "6",+ "name": "Q4",+ "type": "tri_state",+ "description": "3-state output of flip-flop 4."+ },+ {+ "number": "7",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 1.65 V to 3.6 V recommended."+ },+ {+ "number": "8",+ "name": "Q5",+ "type": "tri_state",+ "description": "3-state output of flip-flop 5."+ },+ {+ "number": "9",+ "name": "Q6",+ "type": "tri_state",+ "description": "3-state output of flip-flop 6."+ },+ {+ "number": "10",+ "name": "Q7",+ "type": "tri_state",+ "description": "3-state output of flip-flop 7."+ },+ {+ "number": "11",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "12",+ "name": "Q8",+ "type": "tri_state",+ "description": "3-state output of flip-flop 8."+ },+ {+ "number": "13",+ "name": "Q9",+ "type": "tri_state",+ "description": "3-state output of flip-flop 9."+ },+ {+ "number": "14",+ "name": "Q10",+ "type": "tri_state",+ "description": "3-state output of flip-flop 10."+ },+ {+ "number": "15",+ "name": "Q11",+ "type": "tri_state",+ "description": "3-state output of flip-flop 11."+ },+ {+ "number": "16",+ "name": "Q12",+ "type": "tri_state",+ "description": "3-state output of flip-flop 12."+ },+ {+ "number": "17",+ "name": "Q13",+ "type": "tri_state",+ "description": "3-state output of flip-flop 13."+ },+ {+ "number": "18",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "19",+ "name": "Q14",+ "type": "tri_state",+ "description": "3-state output of flip-flop 14."+ },+ {+ "number": "20",+ "name": "Q15",+ "type": "tri_state",+ "description": "3-state output of flip-flop 15."+ },+ {+ "number": "21",+ "name": "Q16",+ "type": "tri_state",+ "description": "3-state output of flip-flop 16."+ },+ {+ "number": "22",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 1.65 V to 3.6 V recommended."+ },+ {+ "number": "23",+ "name": "Q17",+ "type": "tri_state",+ "description": "3-state output of flip-flop 17."+ },+ {+ "number": "24",+ "name": "Q18",+ "type": "tri_state",+ "description": "3-state output of flip-flop 18."+ },+ {+ "number": "25",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "26",+ "name": "Q19",+ "type": "tri_state",+ "description": "3-state output of flip-flop 19."+ },+ {+ "number": "27",+ "name": "Q20",+ "type": "tri_state",+ "description": "3-state output of flip-flop 20."+ },+ {+ "number": "28",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "29",+ "name": "CLKEN",+ "type": "input",+ "description": "Clock enable; when low, data is stored on the positive CLK transition, and when high no data is stored."+ },+ {+ "number": "30",+ "name": "D20",+ "type": "input",+ "description": "Data input for flip-flop 20 with bus hold."+ },+ {+ "number": "31",+ "name": "D19",+ "type": "input",+ "description": "Data input for flip-flop 19 with bus hold."+ },+ {+ "number": "32",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "33",+ "name": "D18",+ "type": "input",+ "description": "Data input for flip-flop 18 with bus hold."+ },+ {+ "number": "34",+ "name": "D17",+ "type": "input",+ "description": "Data input for flip-flop 17 with bus hold."+ },+ {+ "number": "35",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 1.65 V to 3.6 V recommended."+ },+ {+ "number": "36",+ "name": "D16",+ "type": "input",+ "description": "Data input for flip-flop 16 with bus hold."+ },+ {+ "number": "37",+ "name": "D15",+ "type": "input",+ "description": "Data input for flip-flop 15 with bus hold."+ },+ {+ "number": "38",+ "name": "D14",+ "type": "input",+ "description": "Data input for flip-flop 14 with bus hold."+ },+ {+ "number": "39",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "40",+ "name": "D13",+ "type": "input",+ "description": "Data input for flip-flop 13 with bus hold."+ },+ {+ "number": "41",+ "name": "D12",+ "type": "input",+ "description": "Data input for flip-flop 12 with bus hold."+ },+ {+ "number": "42",+ "name": "D11",+ "type": "input",+ "description": "Data input for flip-flop 11 with bus hold."+ },+ {+ "number": "43",+ "name": "D10",+ "type": "input",+ "description": "Data input for flip-flop 10 with bus hold."+ },+ {+ "number": "44",+ "name": "D9",+ "type": "input",+ "description": "Data input for flip-flop 9 with bus hold."+ },+ {+ "number": "45",+ "name": "D8",+ "type": "input",+ "description": "Data input for flip-flop 8 with bus hold."+ },+ {+ "number": "46",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "47",+ "name": "D7",+ "type": "input",+ "description": "Data input for flip-flop 7 with bus hold."+ },+ {+ "number": "48",+ "name": "D6",+ "type": "input",+ "description": "Data input for flip-flop 6 with bus hold."+ },+ {+ "number": "49",+ "name": "D5",+ "type": "input",+ "description": "Data input for flip-flop 5 with bus hold."+ },+ {+ "number": "50",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 1.65 V to 3.6 V recommended."+ },+ {+ "number": "51",+ "name": "D4",+ "type": "input",+ "description": "Data input for flip-flop 4 with bus hold."+ },+ {+ "number": "52",+ "name": "D3",+ "type": "input",+ "description": "Data input for flip-flop 3 with bus hold."+ },+ {+ "number": "53",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."+ },+ {+ "number": "54",+ "name": "D2",+ "type": "input",+ "description": "Data input for flip-flop 2 with bus hold."+ },+ {+ "number": "55",+ "name": "D1",+ "type": "input",+ "description": "Data input for flip-flop 1 with bus hold."+ },+ {+ "number": "56",+ "name": "CLK",+ "type": "input",+ "description": "Clock input; data is stored on the positive transition when CLKEN is low."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 18,+ "cost_usd": 0.1795,+ "at": "2026-10-07T02:39:51"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74alvch16721",+ "pages": 18,+ "sha256": "dec914c4a56319a2",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 56,+ "described": 56,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "sn74alvch16721dlr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.35,+ 18.5,+ 2.99+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "496b138c9bddb6111fccc97928b5e654846ac39b68862745293b24c720d158e5",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74alvch16721dlr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.35,+ 18.5,+ 2.99+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "44b5dcb9533e392c820bb01de2c4ea67cd4ef23612509667263acc63b46a3f38",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}