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SN74F258D
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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 @@+# SN74F258D++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SOIC-16++SN74F258D 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 | A/B | input | Common select input that chooses the A data inputs when low and the B data inputs when high, per the function table. |+| 2 | 1A | input | Channel 1 data input A, passed to 1Y when A/B is low and OE is low. |+| 3 | 1B | input | Channel 1 data input B, passed to 1Y when A/B is high and OE is low. |+| 4 | 1Y | tri_state | Channel 1 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA. |+| 5 | 2A | input | Channel 2 data input A, passed to 2Y when A/B is low and OE is low. |+| 6 | 2B | input | Channel 2 data input B, passed to 2Y when A/B is high and OE is low. |+| 7 | 2Y | tri_state | Channel 2 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA. |+| 8 | GND | power_in | Ground reference for the device. |+| 9 | 3Y | tri_state | Channel 3 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA. |+| 10 | 3B | input | Channel 3 data input B, passed to 3Y when A/B is high and OE is low. |+| 11 | 3A | input | Channel 3 data input A, passed to 3Y when A/B is low and OE is low. |+| 12 | 4Y | tri_state | Channel 4 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA. |+| 13 | 4B | input | Channel 4 data input B, passed to 4Y when A/B is high and OE is low. |+| 14 | 4A | input | Channel 4 data input A, passed to 4Y when A/B is low and OE is low. |+| 15 | OE | input | Active-low output enable; a high level puts all Y outputs in the high-impedance state. |+| 16 | VCC | power_in | Supply voltage, 4.5 V minimum to 5.5 V maximum (5 V nominal) per recommended operating conditions. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74F258D`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `sn74f258d-etched.step` / `sn74f258d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74f258d.step` / `sn74f258d.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/sn74f258) (9 pp, sha256 `b17fc8383fc9ef3e`, retrieved 2026-10-07, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/sn74f258d-datasheet.pdf)
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The pin map; The datasheet covers both SN54F258 and SN74F258. The SOIC-16 part SN74F258D is rated 0 to 70 C, and "+ ],+ "pages_sent": 9,+ "cost_usd": 0.0553,+ "at": "2026-10-07T23:26:14"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74f258",+ "pages": 9,+ "sha256": "b17fc8383fc9ef3e",+ "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": "sn74f258d.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": "sn74f258d-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": "fc6b5d9fb2cedb86b3b8f2e961d864074d8898420cd7fad9f13575a725cf6607",+ "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]"+ }+}