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SN74LS148DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# SN74LS148DR++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SOIC-16++SN74LS148DR from Texas Instruments, in a SOIC-16. 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 | 4 | input | Active-low data input 4 of the eight priority-encoded data lines. |+| 2 | 5 | input | Active-low data input 5 of the eight priority-encoded data lines. |+| 3 | 6 | input | Active-low data input 6 of the eight priority-encoded data lines. |+| 4 | 7 | input | Active-low data input 7, the highest-priority data line. |+| 5 | EI | input | Enable input for cascading; a high level forces all outputs high and a low level enables encoding. |+| 6 | A2 | output | Active-low address output A2 of the three-line (4-2-1) binary code. |+| 7 | A1 | output | Active-low address output A1 of the three-line (4-2-1) binary code. |+| 8 | GND | power_in | Ground. |+| 9 | A0 | output | Active-low address output A0 of the three-line (4-2-1) binary code. |+| 10 | 0 | input | Active-low data input 0, the lowest-priority data line. |+| 11 | 1 | input | Active-low data input 1 of the eight priority-encoded data lines. |+| 12 | 2 | input | Active-low data input 2 of the eight priority-encoded data lines. |+| 13 | 3 | input | Active-low data input 3 of the eight priority-encoded data lines. |+| 14 | GS | output | Active-low group select output that goes low when EI is low and any data input is low. |+| 15 | EO | output | Active-low enable output for cascading that goes low only when EI is low and all data inputs are high. |+| 16 | VCC | power_in | Positive supply voltage. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74LS148DR`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `sn74ls148dr-etched.step` / `sn74ls148dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls148dr.step` / `sn74ls148dr.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/lit/ds/symlink/sn74ls148.pdf) (28 pp, sha256 `51a9a41a1e0caacc`, retrieved 2026-10-07, tier: manufacturer)+- **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/sn74ls148dr-datasheet.pdf)
page.jsonadded+249@@ -0,0 +1,249 @@+{+ "slug": "sn74ls148dr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "sn74ls148dr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "sn74ls148dr.kicad_sym",+ "sn74ls148dr.kicad_mod",+ "sn74ls148dr.glb",+ "sn74ls148dr.step",+ "sn74ls148dr.lbr",+ "docs/hero.png",+ "docs/sn74ls148dr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "sn74ls148dr-hero.glb",+ "sn74ls148dr-hero.overlay.json"+ ],+ "component": {+ "mpn": "SN74LS148DR",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-16",+ "pin_count": 16,+ "category": "Logic",+ "subcategory": "Signal Switches, Multiplexers, Decoders",+ "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ls148.pdf",+ "parts": {+ "symbol": "sn74ls148dr.kicad_sym",+ "footprint": "sn74ls148dr.kicad_mod",+ "model_3d": "sn74ls148dr-hero.glb",+ "model_3d_plain": "sn74ls148dr.glb",+ "model_3d_step": "sn74ls148dr-etched.step",+ "model_3d_step_plain": "sn74ls148dr.step",+ "lbr": "sn74ls148dr.lbr"+ },+ "distributor_links": {+ "lcsc": "C2674594",+ "digikey": "296-29445-2-ND",+ "mouser": "595-SN74LS148DR"+ },+ "distributor_check": {+ "checked_at": "2026-10-07T02:09:22Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-29445-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-SN74LS148DR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "4",+ "type": "input",+ "description": "Active-low data input 4 of the eight priority-encoded data lines."+ },+ {+ "number": "2",+ "name": "5",+ "type": "input",+ "description": "Active-low data input 5 of the eight priority-encoded data lines."+ },+ {+ "number": "3",+ "name": "6",+ "type": "input",+ "description": "Active-low data input 6 of the eight priority-encoded data lines."+ },+ {+ "number": "4",+ "name": "7",+ "type": "input",+ "description": "Active-low data input 7, the highest-priority data line."+ },+ {+ "number": "5",+ "name": "EI",+ "type": "input",+ "description": "Enable input for cascading; a high level forces all outputs high and a low level enables encoding."+ },+ {+ "number": "6",+ "name": "A2",+ "type": "output",+ "description": "Active-low address output A2 of the three-line (4-2-1) binary code."+ },+ {+ "number": "7",+ "name": "A1",+ "type": "output",+ "description": "Active-low address output A1 of the three-line (4-2-1) binary code."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground."+ },+ {+ "number": "9",+ "name": "A0",+ "type": "output",+ "description": "Active-low address output A0 of the three-line (4-2-1) binary code."+ },+ {+ "number": "10",+ "name": "0",+ "type": "input",+ "description": "Active-low data input 0, the lowest-priority data line."+ },+ {+ "number": "11",+ "name": "1",+ "type": "input",+ "description": "Active-low data input 1 of the eight priority-encoded data lines."+ },+ {+ "number": "12",+ "name": "2",+ "type": "input",+ "description": "Active-low data input 2 of the eight priority-encoded data lines."+ },+ {+ "number": "13",+ "name": "3",+ "type": "input",+ "description": "Active-low data input 3 of the eight priority-encoded data lines."+ },+ {+ "number": "14",+ "name": "GS",+ "type": "output",+ "description": "Active-low group select output that goes low when EI is low and any data input is low."+ },+ {+ "number": "15",+ "name": "EO",+ "type": "output",+ "description": "Active-low enable output for cascading that goes low only when EI is low and all data inputs are high."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply voltage."+ }+ ],+ "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: Pin 15 is printed as 'E0' on the package diagram, but the description and function table call it EO ; I did not read pages 4-12, so the descriptions have no numeric limits such as supply range or drive ",+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 12,+ "cost_usd": 0.2157,+ "at": "2026-10-07T02:08:57"+ },+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/sn74ls148.pdf",+ "pages": 28,+ "sha256": "51a9a41a1e0caacc",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "sn74ls148dr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74ls148dr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "022bceb932e9c532ad8fc25e12f62e93b0ead489c2627a945ae6392ac5a60a72",+ "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]"+ }+}