component
SN74LVC257AMPWREP
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-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 @@+# SN74LVC257AMPWREP++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · TSSOP-16++SN74LVC257AMPWREP from Texas Instruments, in a TSSOP-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 | A/B | input | Select input for all multiplexer stages; low selects A inputs, high selects B inputs |+| 2 | 1A | input | Data input A for multiplexer stage 1 |+| 3 | 1B | input | Data input B for multiplexer stage 1 |+| 4 | 1Y | tri_state | Three-state output for multiplexer stage 1; disabled (high impedance) when OE is high |+| 5 | 2A | input | Data input A for multiplexer stage 2 |+| 6 | 2B | input | Data input B for multiplexer stage 2 |+| 7 | 2Y | tri_state | Three-state output for multiplexer stage 2; disabled (high impedance) when OE is high |+| 8 | GND | power_in | Ground (0V reference) |+| 9 | 3Y | tri_state | Three-state output for multiplexer stage 3; disabled (high impedance) when OE is high |+| 10 | 3B | input | Data input B for multiplexer stage 3 |+| 11 | 3A | input | Data input A for multiplexer stage 3 |+| 12 | 4Y | tri_state | Three-state output for multiplexer stage 4; disabled (high impedance) when OE is high |+| 13 | 4B | input | Data input B for multiplexer stage 4 |+| 14 | 4A | input | Data input A for multiplexer stage 4 |+| 15 | OE | input | Output enable control input; active-low, outputs disabled (high impedance) when high |+| 16 | VCC | power_in | Positive power supply; recommended operating voltage range 2V to 3.6V |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74LVC257AMPWREP`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)+- 3D model files: `sn74lvc257ampwrep-etched.step` / `sn74lvc257ampwrep-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lvc257ampwrep.step` / `sn74lvc257ampwrep.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/sn74lvc257a-ep) (13 pp, sha256 `8ee0b28dc740161a`, retrieved 2026-10-07, 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/sn74lvc257ampwrep-datasheet.pdf)
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low selects A inputs, high selects B inputs"+ },+ {+ "number": "2",+ "name": "1A",+ "type": "input",+ "description": "Data input A for multiplexer stage 1"+ },+ {+ "number": "3",+ "name": "1B",+ "type": "input",+ "description": "Data input B for multiplexer stage 1"+ },+ {+ "number": "4",+ "name": "1Y",+ "type": "tri_state",+ "description": "Three-state output for multiplexer stage 1; disabled (high impedance) when OE is high"+ },+ {+ "number": "5",+ "name": "2A",+ "type": "input",+ "description": "Data input A for multiplexer stage 2"+ },+ {+ "number": "6",+ "name": "2B",+ "type": "input",+ "description": "Data input B for multiplexer stage 2"+ },+ {+ "number": "7",+ "name": "2Y",+ "type": "tri_state",+ "description": "Three-state output for multiplexer stage 2; disabled (high impedance) when OE is high"+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground (0V reference)"+ },+ {+ "number": "9",+ "name": "3Y",+ "type": "tri_state",+ "description": "Three-state output for multiplexer stage 3; disabled (high impedance) when OE is high"+ },+ {+ "number": "10",+ "name": "3B",+ "type": "input",+ "description": "Data input B for multiplexer stage 3"+ },+ {+ "number": "11",+ "name": "3A",+ "type": "input",+ "description": "Data input A for multiplexer stage 3"+ },+ {+ "number": "12",+ "name": "4Y",+ "type": "tri_state",+ "description": "Three-state output for multiplexer stage 4; disabled (high impedance) when OE is high"+ },+ {+ "number": "13",+ "name": "4B",+ "type": "input",+ "description": "Data input B for multiplexer stage 4"+ },+ {+ "number": "14",+ "name": "4A",+ "type": "input",+ "description": "Data input A for multiplexer stage 4"+ },+ {+ "number": "15",+ "name": "OE",+ "type": "input",+ "description": "Output enable control input; active-low, outputs disabled (high impedance) when high"+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive power supply; recommended operating voltage range 2V to 3.6V"+ }+ ],+ "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": 13,+ "cost_usd": 0.1136,+ "at": "2026-10-07T02:14:18"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74lvc257a-ep",+ "pages": 13,+ "sha256": "8ee0b28dc740161a",+ "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": "sn74lvc257ampwrep.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74lvc257ampwrep-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "43f2ad9bde968ac3768ad543b4fe20add7ed985c9a00797915c9d2e4ecb6d108",+ "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]"+ }+}