component
SN74LS540DWR
Public Made by Adomby adom
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+56@@ -0,0 +1,56 @@+# SN74LS540DWR++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil++SN74LS540DWR 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 | G1 | input | Active-low output enable 1; if either G1 or G2 is high, all eight outputs are in the high-impedance state. |+| 2 | A1 | input | Data input 1 with hysteresis, inverted to Y1 on the 'LS540. |+| 3 | A2 | input | Data input 2 with hysteresis, inverted to Y2 on the 'LS540. |+| 4 | A3 | input | Data input 3 with hysteresis, inverted to Y3 on the 'LS540. |+| 5 | A4 | input | Data input 4 with hysteresis, inverted to Y4 on the 'LS540. |+| 6 | A5 | input | Data input 5 with hysteresis, inverted to Y5 on the 'LS540. |+| 7 | A6 | input | Data input 6 with hysteresis, inverted to Y6 on the 'LS540. |+| 8 | A7 | input | Data input 7 with hysteresis, inverted to Y7 on the 'LS540. |+| 9 | A8 | input | Data input 8 with hysteresis, inverted to Y8 on the 'LS540. |+| 10 | GND | power_in | Ground; voltage values are specified with respect to this network ground terminal. |+| 11 | Y8 | tri_state | 3-state inverting output 8, rated 24 mA sink and -15 mA source for SN74LS540. |+| 12 | Y7 | tri_state | 3-state inverting output 7, rated 24 mA sink and -15 mA source for SN74LS540. |+| 13 | Y6 | tri_state | 3-state inverting output 6, rated 24 mA sink and -15 mA source for SN74LS540. |+| 14 | Y5 | tri_state | 3-state inverting output 5, rated 24 mA sink and -15 mA source for SN74LS540. |+| 15 | Y4 | tri_state | 3-state inverting output 4, rated 24 mA sink and -15 mA source for SN74LS540. |+| 16 | Y3 | tri_state | 3-state inverting output 3, rated 24 mA sink and -15 mA source for SN74LS540. |+| 17 | Y2 | tri_state | 3-state inverting output 2, rated 24 mA sink and -15 mA source for SN74LS540. |+| 18 | Y1 | tri_state | 3-state inverting output 1, rated 24 mA sink and -15 mA source for SN74LS540. |+| 19 | G2 | input | Active-low output enable 2; if either G1 or G2 is high, all eight outputs are in the high-impedance state. |+| 20 | VCC | power_in | Supply voltage; absolute maximum 7 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-20-300mil |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74LS540DWR`+- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`+- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)+- 3D model files: `sn74ls540dwr-etched.step` / `sn74ls540dwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls540dwr.step` / `sn74ls540dwr.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/sn74ls541) (24 pp, sha256 `9788278e6b6fa31f`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/sn74ls540dwr-datasheet.pdf)
page.jsonadded+273@@ -0,0 +1,273 @@+{+ "slug": "sn74ls540dwr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "sn74ls540dwr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "sn74ls540dwr.kicad_sym",+ "sn74ls540dwr.kicad_mod",+ "sn74ls540dwr.glb",+ "sn74ls540dwr.step",+ "sn74ls540dwr.lbr",+ "docs/hero.png",+ "docs/sn74ls540dwr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "sn74ls540dwr-hero.glb",+ "sn74ls540dwr-hero.overlay.json"+ ],+ "component": {+ "mpn": "SN74LS540DWR",+ "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/sn74ls541",+ "parts": {+ "symbol": "sn74ls540dwr.kicad_sym",+ "footprint": "sn74ls540dwr.kicad_mod",+ "model_3d": "sn74ls540dwr-hero.glb",+ "model_3d_plain": "sn74ls540dwr.glb",+ "model_3d_step": "sn74ls540dwr-etched.step",+ "model_3d_step_plain": "sn74ls540dwr.step",+ "lbr": "sn74ls540dwr.lbr"+ },+ "distributor_links": {+ "lcsc": "C2675592",+ "digikey": "296-SN74LS540DWRTR-ND",+ "mouser": "595-SN74LS540DWR"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T16:07:36Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-SN74LS540DWRTR-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-SN74LS540DWR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "G1",+ "type": "input",+ "description": "Active-low output enable 1; if either G1 or G2 is high, all eight outputs are in the high-impedance state."+ },+ {+ "number": "2",+ "name": "A1",+ "type": "input",+ "description": "Data input 1 with hysteresis, inverted to Y1 on the 'LS540."+ },+ {+ "number": "3",+ "name": "A2",+ "type": "input",+ "description": "Data input 2 with hysteresis, inverted to Y2 on the 'LS540."+ },+ {+ "number": "4",+ "name": "A3",+ "type": "input",+ "description": "Data input 3 with hysteresis, inverted to Y3 on the 'LS540."+ },+ {+ "number": "5",+ "name": "A4",+ "type": "input",+ "description": "Data input 4 with hysteresis, inverted to Y4 on the 'LS540."+ },+ {+ "number": "6",+ "name": "A5",+ "type": "input",+ "description": "Data input 5 with hysteresis, inverted to Y5 on the 'LS540."+ },+ {+ "number": "7",+ "name": "A6",+ "type": "input",+ "description": "Data input 6 with hysteresis, inverted to Y6 on the 'LS540."+ },+ {+ "number": "8",+ "name": "A7",+ "type": "input",+ "description": "Data input 7 with hysteresis, inverted to Y7 on the 'LS540."+ },+ {+ "number": "9",+ "name": "A8",+ "type": "input",+ "description": "Data input 8 with hysteresis, inverted to Y8 on the 'LS540."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; voltage values are specified with respect to this network ground terminal."+ },+ {+ "number": "11",+ "name": "Y8",+ "type": "tri_state",+ "description": "3-state inverting output 8, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "12",+ "name": "Y7",+ "type": "tri_state",+ "description": "3-state inverting output 7, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "13",+ "name": "Y6",+ "type": "tri_state",+ "description": "3-state inverting output 6, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "14",+ "name": "Y5",+ "type": "tri_state",+ "description": "3-state inverting output 5, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "15",+ "name": "Y4",+ "type": "tri_state",+ "description": "3-state inverting output 4, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "16",+ "name": "Y3",+ "type": "tri_state",+ "description": "3-state inverting output 3, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "17",+ "name": "Y2",+ "type": "tri_state",+ "description": "3-state inverting output 2, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "18",+ "name": "Y1",+ "type": "tri_state",+ "description": "3-state inverting output 1, rated 24 mA sink and -15 mA source for SN74LS540."+ },+ {+ "number": "19",+ "name": "G2",+ "type": "input",+ "description": "Active-low output enable 2; if either G1 or G2 is high, all eight outputs are in the high-impedance state."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage; absolute maximum 7 V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-sonnet-5-5",+ "primary_mode": "vision",+ "consensus_model": "claude-opus-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Only pages 1-2 were read; the remaining pages (3-12) were not viewed, so recommended operating condi",+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 12,+ "cost_usd": 0.1582,+ "at": "2026-10-08T16:07:15"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74ls541",+ "pages": 24,+ "sha256": "9788278e6b6fa31f",+ "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": "sn74ls540dwr.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": "sn74ls540dwr-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": "0d8485bfe96daefb527489d910616ecfd992b57ef52ae02f542f66f03628188e",+ "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]"+ }+}