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CD74HCT139M96
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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 @@+# CD74HCT139M96++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SOIC-16++CD74HCT139M96 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 | 1E | input | Active-low enable input for decoder 1; when high all four 1Y outputs stay high, and it serves as the data input in demultiplexer operation. |+| 2 | 1A0 | input | Select input A0 for decoder 1; with 1A1 selects which of the four 1Y outputs goes low. |+| 3 | 1A1 | input | Select input A1 for decoder 1; with 1A0 selects which of the four 1Y outputs goes low. |+| 4 | 1Y0 | output | Active-low output 0 of decoder 1, normally high; standard output drives 10 LSTTL loads. |+| 5 | 1Y1 | output | Active-low output 1 of decoder 1, normally high; standard output drives 10 LSTTL loads. |+| 6 | 1Y2 | output | Active-low output 2 of decoder 1, normally high; standard output drives 10 LSTTL loads. |+| 7 | 1Y3 | output | Active-low output 3 of decoder 1, normally high; standard output drives 10 LSTTL loads. |+| 8 | GND | power_in | Ground reference; DC VCC or ground current limited to ±50mA. |+| 9 | 2Y3 | output | Active-low output 3 of decoder 2, normally high; standard output drives 10 LSTTL loads. |+| 10 | 2Y2 | output | Active-low output 2 of decoder 2, normally high; standard output drives 10 LSTTL loads. |+| 11 | 2Y1 | output | Active-low output 1 of decoder 2, normally high; standard output drives 10 LSTTL loads. |+| 12 | 2Y0 | output | Active-low output 0 of decoder 2, normally high; standard output drives 10 LSTTL loads. |+| 13 | 2A1 | input | Select input A1 for decoder 2; with 2A0 selects which of the four 2Y outputs goes low. |+| 14 | 2A0 | input | Select input A0 for decoder 2; with 2A1 selects which of the four 2Y outputs goes low. |+| 15 | 2E | input | Active-low enable input for decoder 2; when high all four 2Y outputs stay high, and it serves as the data input in demultiplexer operation. |+| 16 | VCC | power_in | Positive supply; HCT types operate from 4.5V to 5.5V, absolute maximum -0.5V to 7V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `CD74HCT139M96`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `cd74hct139m96-etched.step` / `cd74hct139m96-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hct139m96.step` / `cd74hct139m96.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/cd74hct139) (14 pp, sha256 `73fb34554a953f9b`, retrieved 2026-10-01, 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/cd74hct139m96-datasheet.pdf)
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when high all four 1Y outputs stay high, and it serves as the data input in demultiplexer operation."+ },+ {+ "number": "2",+ "name": "1A0",+ "type": "input",+ "description": "Select input A0 for decoder 1; with 1A1 selects which of the four 1Y outputs goes low."+ },+ {+ "number": "3",+ "name": "1A1",+ "type": "input",+ "description": "Select input A1 for decoder 1; with 1A0 selects which of the four 1Y outputs goes low."+ },+ {+ "number": "4",+ "name": "1Y0",+ "type": "output",+ "description": "Active-low output 0 of decoder 1, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "5",+ "name": "1Y1",+ "type": "output",+ "description": "Active-low output 1 of decoder 1, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "6",+ "name": "1Y2",+ "type": "output",+ "description": "Active-low output 2 of decoder 1, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "7",+ "name": "1Y3",+ "type": "output",+ "description": "Active-low output 3 of decoder 1, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference; DC VCC or ground current limited to ±50mA."+ },+ {+ "number": "9",+ "name": "2Y3",+ "type": "output",+ "description": "Active-low output 3 of decoder 2, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "10",+ "name": "2Y2",+ "type": "output",+ "description": "Active-low output 2 of decoder 2, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "11",+ "name": "2Y1",+ "type": "output",+ "description": "Active-low output 1 of decoder 2, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "12",+ "name": "2Y0",+ "type": "output",+ "description": "Active-low output 0 of decoder 2, normally high; standard output drives 10 LSTTL loads."+ },+ {+ "number": "13",+ "name": "2A1",+ "type": "input",+ "description": "Select input A1 for decoder 2; with 2A0 selects which of the four 2Y outputs goes low."+ },+ {+ "number": "14",+ "name": "2A0",+ "type": "input",+ "description": "Select input A0 for decoder 2; with 2A1 selects which of the four 2Y outputs goes low."+ },+ {+ "number": "15",+ "name": "2E",+ "type": "input",+ "description": "Active-low enable input for decoder 2; when high all four 2Y outputs stay high, and it serves as the data input in demultiplexer operation."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply; HCT types operate from 4.5V to 5.5V, absolute maximum -0.5V to 7V."+ }+ ],+ "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": 14,+ "cost_usd": 0.1149,+ "at": "2026-10-01T06:03:47"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/cd74hct139",+ "pages": 14,+ "sha256": "73fb34554a953f9b",+ "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"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}