component
SN74LS156NSR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SO-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 @@+# SN74LS156NSR++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SO-16++SN74LS156NSR from Texas Instruments, in a SO-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 | 1C | input | Data input for section 1; data applied at 1C is inverted at the 1Y outputs. |+| 2 | 1G | input | Active-low strobe (enable) input for section 1. |+| 3 | B | input | Binary-address select input common to both sections. |+| 4 | 1Y3 | output | Open-collector output 3 of section 1. |+| 5 | 1Y2 | output | Open-collector output 2 of section 1. |+| 6 | 1Y1 | output | Open-collector output 1 of section 1. |+| 7 | 1Y0 | output | Open-collector output 0 of section 1. |+| 8 | GND | power_in | Ground. |+| 9 | 2Y0 | output | Open-collector output 0 of section 2. |+| 10 | 2Y1 | output | Open-collector output 1 of section 2. |+| 11 | 2Y2 | output | Open-collector output 2 of section 2. |+| 12 | 2Y3 | output | Open-collector output 3 of section 2. |+| 13 | A | input | Binary-address select input common to both sections. |+| 14 | 2G | input | Active-low strobe (enable) input for section 2. |+| 15 | 2C | input | Active-low data input for section 2; data applied at 2C is not inverted through its outputs. |+| 16 | VCC | power_in | Positive supply voltage. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SO-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74LS156NSR`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SO-16 (KiCad packages3D, STEP)+- 3D model files: `sn74ls156nsr-etched.step` / `sn74ls156nsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls156nsr.step` / `sn74ls156nsr.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/sn74ls156) (22 pp, sha256 `893a930eaec60d8f`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/sn74ls156nsr-datasheet.pdf)
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Page 7 is headed SN74LS156A, but the part and ordering",+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 22,+ "cost_usd": 0.3796,+ "at": "2026-10-08T19:00:18"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74ls156",+ "pages": 22,+ "sha256": "893a930eaec60d8f",+ "source_tier": "lcsc"+ },+ "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": "sn74ls156nsr.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": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74ls156nsr-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": "41d574a2483821c6b9b7ed8b8f68f33779cc6276f29e9c11953f6d19b743ee3b",+ "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]"+ }+}