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SN74HCT138PWR
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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 @@+# SN74HCT138PWR++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · TSSOP-16++SN74HCT138PWR 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 | input | Binary select input A (LSB) that, with B and C, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max. |+| 2 | B | input | Binary select input B that, with A and C, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max. |+| 3 | C | input | Binary select input C (MSB) that, with A and B, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max. |+| 4 | G2A | input | Active-low enable input G2A; all outputs stay high unless G2A and G2B are low and G1 is high. |+| 5 | G2B | input | Active-low enable input G2B; all outputs stay high unless G2A and G2B are low and G1 is high. |+| 6 | G1 | input | Active-high enable input G1; must be high, with G2A and G2B low, to enable the decoder outputs. |+| 7 | Y7 | output | Active-low decoded output 7 that goes low when select code CBA = 111 and the device is enabled, with ±4 mA drive at 5 V. |+| 8 | GND | power_in | Ground pin, 0 V reference. |+| 9 | Y6 | output | Active-low decoded output 6 that goes low when select code CBA = 110 and the device is enabled, with ±4 mA drive at 5 V. |+| 10 | Y5 | output | Active-low decoded output 5 that goes low when select code CBA = 101 and the device is enabled, with ±4 mA drive at 5 V. |+| 11 | Y4 | output | Active-low decoded output 4 that goes low when select code CBA = 100 and the device is enabled, with ±4 mA drive at 5 V. |+| 12 | Y3 | output | Active-low decoded output 3 that goes low when select code CBA = 011 and the device is enabled, with ±4 mA drive at 5 V. |+| 13 | Y2 | output | Active-low decoded output 2 that goes low when select code CBA = 010 and the device is enabled, with ±4 mA drive at 5 V. |+| 14 | Y1 | output | Active-low decoded output 1 that goes low when select code CBA = 001 and the device is enabled, with ±4 mA drive at 5 V. |+| 15 | Y0 | output | Active-low decoded output 0 that goes low when select code CBA = 000 and the device is enabled, with ±4 mA drive at 5 V. |+| 16 | VCC | power_in | Supply voltage pin, 4.5 V to 5.5 V recommended, with a 0.1-µF bypass capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74HCT138PWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)+- 3D model files: `sn74hct138pwr-etched.step` / `sn74hct138pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hct138pwr.step` / `sn74hct138pwr.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/sn74hct138.pdf) (28 pp, sha256 `a0bbbcc2ac42625a`, retrieved 2026-10-06, tier: manufacturer)+- **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/sn74hct138pwr-datasheet.pdf)
page.jsonadded+208@@ -0,0 +1,208 @@+{+ "slug": "sn74hct138pwr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "sn74hct138pwr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "sn74hct138pwr.kicad_sym",+ "sn74hct138pwr.kicad_mod",+ "sn74hct138pwr.glb",+ "sn74hct138pwr.step",+ "sn74hct138pwr.lbr",+ "docs/hero.png",+ "docs/sn74hct138pwr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "sn74hct138pwr-hero.glb",+ "sn74hct138pwr-hero.overlay.json"+ ],+ "component": {+ "mpn": "SN74HCT138PWR",+ "manufacturer": "Texas Instruments",+ "package": "TSSOP-16",+ "pin_count": 16,+ "category": "Logic",+ "subcategory": "Signal Switches, Multiplexers, Decoders",+ "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hct138.pdf",+ "parts": {+ "symbol": "sn74hct138pwr.kicad_sym",+ "footprint": "sn74hct138pwr.kicad_mod",+ "model_3d": "sn74hct138pwr-hero.glb",+ "model_3d_plain": "sn74hct138pwr.glb",+ "model_3d_step": "sn74hct138pwr-etched.step",+ "model_3d_step_plain": "sn74hct138pwr.step",+ "lbr": "sn74hct138pwr.lbr"+ },+ "distributor_links": {+ "lcsc": 8115,+ "digikey": "296-8388-2-ND",+ "mouser": "595-SN74HCT138PWR"+ },+ "distributor_check": {+ "checked_at": "2026-10-06T03:33:33Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-8388-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-SN74HCT138PWR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "A",+ "type": "input",+ "description": "Binary select input A (LSB) that, with B and C, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max."+ },+ {+ "number": "2",+ "name": "B",+ "type": "input",+ "description": "Binary select input B that, with A and C, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max."+ },+ {+ "number": "3",+ "name": "C",+ "type": "input",+ "description": "Binary select input C (MSB) that, with A and B, selects one of eight active-low outputs; inputs are TTL-compatible with VIH 2 V min and VIL 0.8 V max."+ },+ {+ "number": "4",+ "name": "G2A",+ "type": "input",+ "description": "Active-low enable input G2A; all outputs stay high unless G2A and G2B are low and G1 is high."+ },+ {+ "number": "5",+ "name": "G2B",+ "type": "input",+ "description": "Active-low enable input G2B; all outputs stay high unless G2A and G2B are low and G1 is high."+ },+ {+ "number": "6",+ "name": "G1",+ "type": "input",+ "description": "Active-high enable input G1; must be high, with G2A and G2B low, to enable the decoder outputs."+ },+ {+ "number": "7",+ "name": "Y7",+ "type": "output",+ "description": "Active-low decoded output 7 that goes low when select code CBA = 111 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin, 0 V reference."+ },+ {+ "number": "9",+ "name": "Y6",+ "type": "output",+ "description": "Active-low decoded output 6 that goes low when select code CBA = 110 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "10",+ "name": "Y5",+ "type": "output",+ "description": "Active-low decoded output 5 that goes low when select code CBA = 101 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "11",+ "name": "Y4",+ "type": "output",+ "description": "Active-low decoded output 4 that goes low when select code CBA = 100 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "12",+ "name": "Y3",+ "type": "output",+ "description": "Active-low decoded output 3 that goes low when select code CBA = 011 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "13",+ "name": "Y2",+ "type": "output",+ "description": "Active-low decoded output 2 that goes low when select code CBA = 010 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "14",+ "name": "Y1",+ "type": "output",+ "description": "Active-low decoded output 1 that goes low when select code CBA = 001 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "15",+ "name": "Y0",+ "type": "output",+ "description": "Active-low decoded output 0 that goes low when select code CBA = 000 and the device is enabled, with ±4 mA drive at 5 V."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage pin, 4.5 V to 5.5 V recommended, with a 0.1-µF bypass capacitor placed close to the pin."+ }+ ],+ "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": "text+vision",+ "consensus_model": "claude-opus-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 28,+ "cost_usd": 0.4458,+ "at": "2026-10-06T03:33:17"+ },+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/sn74hct138.pdf",+ "pages": 28,+ "sha256": "a0bbbcc2ac42625a",+ "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"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}