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SN74AHCT245QPWRQ1
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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+56@@ -0,0 +1,56 @@+# SN74AHCT245QPWRQ1++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20++SN74AHCT245QPWRQ1 from Texas Instruments, in a TSSOP-20. 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 | DIR | input | Direction control input; low selects B data to A bus, high selects A data to B bus. |+| 2 | A1 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 3 | A2 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 4 | A3 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 5 | A4 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 6 | A5 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 7 | A6 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 8 | A7 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 9 | A8 | bidirectional | A-side bidirectional I/O; data line for octal bus transceiver. |+| 10 | GND | power_in | Ground; circuit common reference and return path. |+| 11 | B8 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 12 | B7 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 13 | B6 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 14 | B5 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 15 | B4 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 16 | B3 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 17 | B2 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 18 | B1 | bidirectional | B-side bidirectional I/O; data line for octal bus transceiver. |+| 19 | OE | input | Output enable input; low enables output drivers, high places outputs in high-impedance isolation state. |+| 20 | VCC | power_in | Power supply input; operating voltage range 4.5V to 5.5V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74AHCT245QPWRQ1`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)+- 3D model files: `sn74ahct245qpwrq1-etched.step` / `sn74ahct245qpwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahct245qpwrq1.step` / `sn74ahct245qpwrq1.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604374030569402368) (19 pp, sha256 `905d9c823453ef68`, retrieved 2026-10-06, 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/sn74ahct245qpwrq1-datasheet.pdf)
page.jsonadded+230@@ -0,0 +1,230 @@+{+ "slug": "sn74ahct245qpwrq1",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. 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low selects B data to A bus, high selects A data to B bus."+ },+ {+ "number": "2",+ "name": "A1",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "3",+ "name": "A2",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "4",+ "name": "A3",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "5",+ "name": "A4",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "6",+ "name": "A5",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "7",+ "name": "A6",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "8",+ "name": "A7",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "9",+ "name": "A8",+ "type": "bidirectional",+ "description": "A-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; circuit common reference and return path."+ },+ {+ "number": "11",+ "name": "B8",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "12",+ "name": "B7",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "13",+ "name": "B6",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "14",+ "name": "B5",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "15",+ "name": "B4",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "16",+ "name": "B3",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "17",+ "name": "B2",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "18",+ "name": "B1",+ "type": "bidirectional",+ "description": "B-side bidirectional I/O; data line for octal bus transceiver."+ },+ {+ "number": "19",+ "name": "OE",+ "type": "input",+ "description": "Output enable input; low enables output drivers, high places outputs in high-impedance isolation state."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply input; operating voltage range 4.5V to 5.5V."+ }+ ],+ "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": 19,+ "cost_usd": 0.1154,+ "at": "2026-10-06T03:35:36"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604374030569402368",+ "pages": 19,+ "sha256": "905d9c823453ef68",+ "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"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}