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SN74ACT244IPWRG4Q1
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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# SN74ACT244IPWRG4Q1++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20++SN74ACT244IPWRG4Q1 from Texas Instruments, in a TSSOP-20. 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 1 (active low): when low, buffer 1 passes noninverted 1A data to the 1Y outputs, and when high the 1Y outputs go to high impedance. |+| 2 | 1A1 | input | Data input 1A1 of buffer 1, which must stay between GND and VCC and must not be left floating when unused. |+| 3 | 2Y4 | output | Three-state output 2Y4 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 4 | 1A2 | input | Data input 1A2 of buffer 1, which must stay between GND and VCC and must not be left floating when unused. |+| 5 | 2Y3 | output | Three-state output 2Y3 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 6 | 1A3 | input | Data input 1A3 of buffer 1, which must stay between GND and VCC and must not be left floating when unused. |+| 7 | 2Y2 | output | Three-state output 2Y2 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 8 | 1A4 | input | Data input 1A4 of buffer 1, which must stay between GND and VCC and must not be left floating when unused. |+| 9 | 2Y1 | output | Three-state output 2Y1 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 10 | GND | power_in | Ground pin for the device. |+| 11 | 2A1 | input | Data input 2A1 of buffer 2, which must stay between GND and VCC and must not be left floating when unused. |+| 12 | 1Y4 | output | Three-state output 1Y4 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 13 | 2A2 | input | Data input 2A2 of buffer 2, which must stay between GND and VCC and must not be left floating when unused. |+| 14 | 1Y3 | output | Three-state output 1Y3 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 15 | 2A3 | input | Data input 2A3 of buffer 2, which must stay between GND and VCC and must not be left floating when unused. |+| 16 | 1Y2 | output | Three-state output 1Y2 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 17 | 2A4 | input | Data input 2A4 of buffer 2, which must stay between GND and VCC and must not be left floating when unused. |+| 18 | 1Y1 | output | Three-state output 1Y1 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions. |+| 19 | 2OE | input | Output Enable 2 (active low): when low, buffer 2 passes noninverted 2A data to the 2Y outputs, and when high the 2Y outputs go to high impedance. |+| 20 | VCC | power_in | Supply pin; the device operates from 4.5 V to 5.5 V VCC per the recommended operating conditions. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74ACT244IPWRG4Q1`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)+- 3D model files: `sn74act244ipwrg4q1-etched.step` / `sn74act244ipwrg4q1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74act244ipwrg4q1.step` / `sn74act244ipwrg4q1.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/sn74act244-q1) (22 pp, sha256 `d751609ed06763df`, retrieved 2026-10-08, 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-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/sn74act244ipwrg4q1-datasheet.pdf)
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"sn74act244ipwrg4q1.kicad_mod",+ "model_3d": "sn74act244ipwrg4q1-hero.glb",+ "model_3d_plain": "sn74act244ipwrg4q1.glb",+ "model_3d_step": "sn74act244ipwrg4q1-etched.step",+ "model_3d_step_plain": "sn74act244ipwrg4q1.step",+ "lbr": "sn74act244ipwrg4q1.lbr"+ },+ "distributor_links": {+ "lcsc": "C2675814",+ "digikey": "296-28839-2-ND",+ "mouser": "595-74ACT244IPWRG4Q1"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T03:37:20Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-28839-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-74ACT244IPWRG4Q1",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "1OE",+ "type": "input",+ "description": "Output Enable 1 (active low): when low, buffer 1 passes noninverted 1A data to the 1Y outputs, and when high the 1Y outputs go to high impedance."+ },+ {+ "number": "2",+ "name": "1A1",+ "type": "input",+ "description": "Data input 1A1 of buffer 1, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "3",+ "name": "2Y4",+ "type": "output",+ "description": "Three-state output 2Y4 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "4",+ "name": "1A2",+ "type": "input",+ "description": "Data input 1A2 of buffer 1, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "5",+ "name": "2Y3",+ "type": "output",+ "description": "Three-state output 2Y3 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "6",+ "name": "1A3",+ "type": "input",+ "description": "Data input 1A3 of buffer 1, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "7",+ "name": "2Y2",+ "type": "output",+ "description": "Three-state output 2Y2 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "8",+ "name": "1A4",+ "type": "input",+ "description": "Data input 1A4 of buffer 1, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "9",+ "name": "2Y1",+ "type": "output",+ "description": "Three-state output 2Y1 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin for the device."+ },+ {+ "number": "11",+ "name": "2A1",+ "type": "input",+ "description": "Data input 2A1 of buffer 2, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "12",+ "name": "1Y4",+ "type": "output",+ "description": "Three-state output 1Y4 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "13",+ "name": "2A2",+ "type": "input",+ "description": "Data input 2A2 of buffer 2, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "14",+ "name": "1Y3",+ "type": "output",+ "description": "Three-state output 1Y3 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "15",+ "name": "2A3",+ "type": "input",+ "description": "Data input 2A3 of buffer 2, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "16",+ "name": "1Y2",+ "type": "output",+ "description": "Three-state output 1Y2 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "17",+ "name": "2A4",+ "type": "input",+ "description": "Data input 2A4 of buffer 2, which must stay between GND and VCC and must not be left floating when unused."+ },+ {+ "number": "18",+ "name": "1Y1",+ "type": "output",+ "description": "Three-state output 1Y1 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions."+ },+ {+ "number": "19",+ "name": "2OE",+ "type": "input",+ "description": "Output Enable 2 (active low): when low, buffer 2 passes noninverted 2A data to the 2Y outputs, and when high the 2Y outputs go to high impedance."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply pin; the device operates from 4.5 V to 5.5 V VCC per the recommended operating conditions."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The datasheet is a Chinese translation (ZHCSSO3E) of the English datasheet SCAS766. The pin numbers ; Pin types and descriptions were derived from Table 4-1 and the functional text in Sections 5.3 and 7"+ ],+ "pages_sent": 22,+ "cost_usd": 0.0838,+ "at": "2026-10-08T03:37:01"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74act244-q1",+ "pages": 22,+ "sha256": "d751609ed06763df",+ "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"+ },+ "models_3d": [+ {+ "file": "sn74act244ipwrg4q1.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74act244ipwrg4q1-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "9d8ea18510bb80a4cf78e9816b707613d8e171d24bf5e4d265562ba566d84953",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}