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SN74AHC244DBR
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Texas Instruments Buffers, Drivers, Receivers, Transceivers, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# SN74AHC244DBR++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SSOP-20-208mil++SN74AHC244DBR from Texas Instruments, in a SSOP-20-208mil. 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 | 1OE | input | Output enable for buffer 1, active low; low enables outputs 1Y1-1Y4, high disables to high-impedance state |+| 2 | 1A1 | input | Input to buffer 1 channel 1; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 3 | 2Y4 | tri_state | Three-state output from buffer 2 channel 4; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 4 | 1A2 | input | Input to buffer 1 channel 2; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 5 | 2Y3 | tri_state | Three-state output from buffer 2 channel 3; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 6 | 1A3 | input | Input to buffer 1 channel 3; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 7 | 2Y2 | tri_state | Three-state output from buffer 2 channel 2; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 8 | 1A4 | input | Input to buffer 1 channel 4; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 9 | 2Y1 | tri_state | Three-state output from buffer 2 channel 1; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 10 | GND | power_in | Ground reference |+| 11 | 2A1 | input | Input to buffer 2 channel 1; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 12 | 1Y4 | tri_state | Three-state output from buffer 1 channel 4; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 13 | 2A2 | input | Input to buffer 2 channel 2; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 14 | 1Y3 | tri_state | Three-state output from buffer 1 channel 3; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 15 | 2A3 | input | Input to buffer 2 channel 3; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 16 | 1Y2 | tri_state | Three-state output from buffer 1 channel 2; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 17 | 2A4 | input | Input to buffer 2 channel 4; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V |+| 18 | 1Y1 | tri_state | Three-state output from buffer 1 channel 1; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V |+| 19 | 2OE | input | Output enable for buffer 2, active low; low enables outputs 2Y1-2Y4, high disables to high-impedance state |+| 20 | VCC | power_in | Positive supply voltage, 2V to 5.5V recommended operating range |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SSOP-20-208mil |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74AHC244DBR`+- Footprint: `Package_SO:SSOP-20_5.3x7.2mm_P0.65mm`+- 3D model: SSOP-20-208mil (KiCad packages3D, STEP)+- 3D model files: `sn74ahc244dbr-etched.step` / `sn74ahc244dbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahc244dbr.step` / `sn74ahc244dbr.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/sn74ahc244) (47 pp, sha256 `9eca521fb92d3770`, retrieved 2026-10-01, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/sn74ahc244dbr-datasheet.pdf)
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Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "sn74ahc244dbr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "sn74ahc244dbr.kicad_sym",+ "sn74ahc244dbr.kicad_mod",+ "sn74ahc244dbr.glb",+ "sn74ahc244dbr.step",+ "sn74ahc244dbr.lbr",+ "docs/hero.png",+ "docs/sn74ahc244dbr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "SN74AHC244DBR",+ "manufacturer": "Texas Instruments",+ "package": "SSOP-20-208mil",+ "pin_count": 20,+ "category": "Logic",+ "subcategory": "Buffers, Drivers, Receivers, Transceivers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/sn74ahc244",+ "parts": {+ "symbol": "sn74ahc244dbr.kicad_sym",+ "footprint": "sn74ahc244dbr.kicad_mod",+ "model_3d": "sn74ahc244dbr-etched.glb",+ "model_3d_plain": "sn74ahc244dbr.glb",+ "model_3d_step": "sn74ahc244dbr-etched.step",+ "model_3d_step_plain": "sn74ahc244dbr.step",+ "lbr": "sn74ahc244dbr.lbr"+ },+ "distributor_links": {+ "lcsc": "C2676219",+ "digikey": "296-4583-2-ND",+ "mouser": "595-SN74AHC244DBR"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T07:07:34Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-4583-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-SN74AHC244DBR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "1OE",+ "type": "input",+ "description": "Output enable for buffer 1, active low; low enables outputs 1Y1-1Y4, high disables to high-impedance state"+ },+ {+ "number": "2",+ "name": "1A1",+ "type": "input",+ "description": "Input to buffer 1 channel 1; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "3",+ "name": "2Y4",+ "type": "tri_state",+ "description": "Three-state output from buffer 2 channel 4; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "4",+ "name": "1A2",+ "type": "input",+ "description": "Input to buffer 1 channel 2; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "5",+ "name": "2Y3",+ "type": "tri_state",+ "description": "Three-state output from buffer 2 channel 3; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "6",+ "name": "1A3",+ "type": "input",+ "description": "Input to buffer 1 channel 3; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "7",+ "name": "2Y2",+ "type": "tri_state",+ "description": "Three-state output from buffer 2 channel 2; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "8",+ "name": "1A4",+ "type": "input",+ "description": "Input to buffer 1 channel 4; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "9",+ "name": "2Y1",+ "type": "tri_state",+ "description": "Three-state output from buffer 2 channel 1; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference"+ },+ {+ "number": "11",+ "name": "2A1",+ "type": "input",+ "description": "Input to buffer 2 channel 1; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "12",+ "name": "1Y4",+ "type": "tri_state",+ "description": "Three-state output from buffer 1 channel 4; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "13",+ "name": "2A2",+ "type": "input",+ "description": "Input to buffer 2 channel 2; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "14",+ "name": "1Y3",+ "type": "tri_state",+ "description": "Three-state output from buffer 1 channel 3; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "15",+ "name": "2A3",+ "type": "input",+ "description": "Input to buffer 2 channel 3; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "16",+ "name": "1Y2",+ "type": "tri_state",+ "description": "Three-state output from buffer 1 channel 2; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "17",+ "name": "2A4",+ "type": "input",+ "description": "Input to buffer 2 channel 4; VIH≥1.5V (VCC=2V) to ≥3.85V (VCC=5.5V), VIL≤0.5V to ≤1.65V"+ },+ {+ "number": "18",+ "name": "1Y1",+ "type": "tri_state",+ "description": "Three-state output from buffer 1 channel 1; VOH≥1.9V to ≥4.4V, VOL≤0.1V to ≤0.5V"+ },+ {+ "number": "19",+ "name": "2OE",+ "type": "input",+ "description": "Output enable for buffer 2, active low; low enables outputs 2Y1-2Y4, high disables to high-impedance state"+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply voltage, 2V to 5.5V recommended operating range"+ }+ ],+ "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": 17,+ "cost_usd": 0.1623,+ "at": "2026-10-01T07:07:16"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74ahc244",+ "pages": 47,+ "sha256": "9eca521fb92d3770",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "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]"+ }+}