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SN74AHC244QDWRQ1
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Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# SN74AHC244QDWRQ1++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil++SN74AHC244QDWRQ1 from Texas Instruments, in a SOIC-20-300mil. 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 | 1OE | input | Active-low output enable for buffer 1 (1Y1 to 1Y4): when OE is low the 1A inputs pass to the 1Y outputs, and when OE is high the 1Y outputs are high-impedance (Z). |+| 2 | 1A1 | input | Data input 1A1 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 3 | 2Y4 | output | Data output 2Y4 of buffer 2, which goes to high-impedance (Z) when 2OE is high. |+| 4 | 1A2 | input | Data input 1A2 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 5 | 2Y3 | output | Data output 2Y3 of buffer 2, which goes to high-impedance (Z) when 2OE is high. |+| 6 | 1A3 | input | Data input 1A3 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 7 | 2Y2 | output | Data output 2Y2 of buffer 2, which goes to high-impedance (Z) when 2OE is high. |+| 8 | 1A4 | input | Data input 1A4 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 9 | 2Y1 | output | Data output 2Y1 of buffer 2, which goes to high-impedance (Z) when 2OE is high. |+| 10 | GND | power_in | Ground pin for the device. |+| 11 | 2A1 | input | Data input 2A1 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 12 | 1Y4 | output | Data output 1Y4 of buffer 1, which goes to high-impedance (Z) when 1OE is high. |+| 13 | 2A2 | input | Data input 2A2 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 14 | 1Y3 | output | Data output 1Y3 of buffer 1, which goes to high-impedance (Z) when 1OE is high. |+| 15 | 2A3 | input | Data input 2A3 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 16 | 1Y2 | output | Data output 1Y2 of buffer 1, which goes to high-impedance (Z) when 1OE is high. |+| 17 | 2A4 | input | Data input 2A4 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND. |+| 18 | 1Y1 | output | Data output 1Y1 of buffer 1, which goes to high-impedance (Z) when 1OE is high. |+| 19 | 2OE | input | Active-low output enable for buffer 2 (2Y1 to 2Y4): when OE is low the 2A inputs pass to the 2Y outputs, and when OE is high the 2Y outputs are high-impedance (Z). |+| 20 | VCC | power_in | Supply pin; the recommended supply range is 2 V to 5.5 V, and each VCC pin should be bypassed close to the device (0.1 µF recommended for a single supply). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-20-300mil |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74AHC244QDWRQ1`+- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`+- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)+- 3D model files: `sn74ahc244qdwrq1-etched.step` / `sn74ahc244qdwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahc244qdwrq1.step` / `sn74ahc244qdwrq1.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/sn74ahc244-q1) (27 pp, sha256 `b8d4fd97ed6baa6f`, retrieved 2026-10-08, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/sn74ahc244qdwrq1-datasheet.pdf)
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Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "sn74ahc244qdwrq1",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "sn74ahc244qdwrq1.kicad_sym",+ "sn74ahc244qdwrq1.kicad_mod",+ "sn74ahc244qdwrq1.glb",+ "sn74ahc244qdwrq1.step",+ "sn74ahc244qdwrq1.lbr",+ "docs/hero.png",+ "docs/sn74ahc244qdwrq1-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "sn74ahc244qdwrq1-hero.glb",+ "sn74ahc244qdwrq1-hero.overlay.json"+ ],+ "component": {+ "mpn": "SN74AHC244QDWRQ1",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-20-300mil",+ "pin_count": 20,+ "category": "Logic",+ "subcategory": "Buffers, Drivers, Receivers, Transceivers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/sn74ahc244-q1",+ "parts": {+ "symbol": "sn74ahc244qdwrq1.kicad_sym",+ "footprint": "sn74ahc244qdwrq1.kicad_mod",+ "model_3d": "sn74ahc244qdwrq1-hero.glb",+ "model_3d_plain": "sn74ahc244qdwrq1.glb",+ "model_3d_step": "sn74ahc244qdwrq1-etched.step",+ "model_3d_step_plain": "sn74ahc244qdwrq1.step",+ "lbr": "sn74ahc244qdwrq1.lbr"+ },+ "distributor_links": {+ "lcsc": "C2676048",+ "digikey": "296-17495-2-ND",+ "mouser": "595-SN74AHC244QDWRQ1"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T19:32:40Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-17495-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-SN74AHC244QDWRQ1",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "1OE",+ "type": "input",+ "description": "Active-low output enable for buffer 1 (1Y1 to 1Y4): when OE is low the 1A inputs pass to the 1Y outputs, and when OE is high the 1Y outputs are high-impedance (Z)."+ },+ {+ "number": "2",+ "name": "1A1",+ "type": "input",+ "description": "Data input 1A1 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "3",+ "name": "2Y4",+ "type": "output",+ "description": "Data output 2Y4 of buffer 2, which goes to high-impedance (Z) when 2OE is high."+ },+ {+ "number": "4",+ "name": "1A2",+ "type": "input",+ "description": "Data input 1A2 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "5",+ "name": "2Y3",+ "type": "output",+ "description": "Data output 2Y3 of buffer 2, which goes to high-impedance (Z) when 2OE is high."+ },+ {+ "number": "6",+ "name": "1A3",+ "type": "input",+ "description": "Data input 1A3 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "7",+ "name": "2Y2",+ "type": "output",+ "description": "Data output 2Y2 of buffer 2, which goes to high-impedance (Z) when 2OE is high."+ },+ {+ "number": "8",+ "name": "1A4",+ "type": "input",+ "description": "Data input 1A4 of buffer 1; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "9",+ "name": "2Y1",+ "type": "output",+ "description": "Data output 2Y1 of buffer 2, which goes to high-impedance (Z) when 2OE is high."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin for the device."+ },+ {+ "number": "11",+ "name": "2A1",+ "type": "input",+ "description": "Data input 2A1 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "12",+ "name": "1Y4",+ "type": "output",+ "description": "Data output 1Y4 of buffer 1, which goes to high-impedance (Z) when 1OE is high."+ },+ {+ "number": "13",+ "name": "2A2",+ "type": "input",+ "description": "Data input 2A2 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "14",+ "name": "1Y3",+ "type": "output",+ "description": "Data output 1Y3 of buffer 1, which goes to high-impedance (Z) when 1OE is high."+ },+ {+ "number": "15",+ "name": "2A3",+ "type": "input",+ "description": "Data input 2A3 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "16",+ "name": "1Y2",+ "type": "output",+ "description": "Data output 1Y2 of buffer 1, which goes to high-impedance (Z) when 1OE is high."+ },+ {+ "number": "17",+ "name": "2A4",+ "type": "input",+ "description": "Data input 2A4 of buffer 2; the datasheet specifies an input voltage range of 0 V to 5.5 V and says unused inputs must be held at VCC or GND."+ },+ {+ "number": "18",+ "name": "1Y1",+ "type": "output",+ "description": "Data output 1Y1 of buffer 1, which goes to high-impedance (Z) when 1OE is high."+ },+ {+ "number": "19",+ "name": "2OE",+ "type": "input",+ "description": "Active-low output enable for buffer 2 (2Y1 to 2Y4): when OE is low the 2A inputs pass to the 2Y outputs, and when OE is high the 2Y outputs are high-impedance (Z)."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply pin; the recommended supply range is 2 V to 5.5 V, and each VCC pin should be bypassed close to the device (0.1 µF recommended for a single supply)."+ }+ ],+ "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 pin table on page 3 is shared by the DW (SOIC-20) and PW (TSSOP-20) packages. The DW pinout is t; The datasheet pin table gives only short names and I/O directions. Per-pin descriptions combine that; The output schema has no field for headline specs, so no spec values were recorded. The VCC range (2"+ ],+ "pages_sent": 27,+ "cost_usd": 0.092,+ "at": "2026-10-08T19:31:46"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74ahc244-q1",+ "pages": 27,+ "sha256": "b8d4fd97ed6baa6f",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "sn74ahc244qdwrq1.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74ahc244qdwrq1-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "2c5957312e93620def0bac1dde82274a6fe36f2704d0401b93c9803913e9f98f",+ "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]"+ }+}