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SN74LVTH244AQPWREP
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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+56@@ -0,0 +1,56 @@+# SN74LVTH244AQPWREP++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20++SN74LVTH244AQPWREP 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 | Active-low output enable for the first 4-bit buffer section; when low the 1Y outputs follow the 1A inputs, and when high the outputs are high-impedance. |+| 2 | 1A1 | input | Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 3 | 2Y4 | tri_state | 3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high. |+| 4 | 1A2 | input | Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 5 | 2Y3 | tri_state | 3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high. |+| 6 | 1A3 | input | Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 7 | 2Y2 | tri_state | 3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high. |+| 8 | 1A4 | input | Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 9 | 2Y1 | tri_state | 3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high. |+| 10 | GND | power_in | Ground reference for the device. |+| 11 | 2A1 | input | Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 12 | 1Y4 | tri_state | 3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high. |+| 13 | 2A2 | input | Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 14 | 1Y3 | tri_state | 3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high. |+| 15 | 2A3 | input | Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 16 | 1Y2 | tri_state | 3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high. |+| 17 | 2A4 | input | Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V. |+| 18 | 1Y1 | tri_state | 3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high. |+| 19 | 2OE | input | Active-low output enable for the second 4-bit buffer section; when low the 2Y outputs follow the 2A inputs, and when high the outputs are high-impedance. |+| 20 | VCC | power_in | Supply voltage, 2.7 V to 3.6 V recommended; tie OE to VCC through a pullup resistor to keep outputs high-impedance during power up and power down. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN74LVTH244AQPWREP`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)+- 3D model files: `sn74lvth244aqpwrep-etched.step` / `sn74lvth244aqpwrep-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lvth244aqpwrep.step` / `sn74lvth244aqpwrep.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/sn74lvth244a-ep) (10 pp, sha256 `8f9c8f2aa9b406df`, retrieved 2026-10-08, 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/sn74lvth244aqpwrep-datasheet.pdf)
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when low the 1Y outputs follow the 1A inputs, and when high the outputs are high-impedance."+ },+ {+ "number": "2",+ "name": "1A1",+ "type": "input",+ "description": "Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "3",+ "name": "2Y4",+ "type": "tri_state",+ "description": "3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high."+ },+ {+ "number": "4",+ "name": "1A2",+ "type": "input",+ "description": "Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "5",+ "name": "2Y3",+ "type": "tri_state",+ "description": "3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high."+ },+ {+ "number": "6",+ "name": "1A3",+ "type": "input",+ "description": "Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "7",+ "name": "2Y2",+ "type": "tri_state",+ "description": "3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high."+ },+ {+ "number": "8",+ "name": "1A4",+ "type": "input",+ "description": "Data input of the first buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "9",+ "name": "2Y1",+ "type": "tri_state",+ "description": "3-state output of the second buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 2OE is high."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference for the device."+ },+ {+ "number": "11",+ "name": "2A1",+ "type": "input",+ "description": "Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "12",+ "name": "1Y4",+ "type": "tri_state",+ "description": "3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high."+ },+ {+ "number": "13",+ "name": "2A2",+ "type": "input",+ "description": "Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "14",+ "name": "1Y3",+ "type": "tri_state",+ "description": "3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high."+ },+ {+ "number": "15",+ "name": "2A3",+ "type": "input",+ "description": "Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "16",+ "name": "1Y2",+ "type": "tri_state",+ "description": "3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high."+ },+ {+ "number": "17",+ "name": "2A4",+ "type": "input",+ "description": "Data input of the second buffer section with bus-hold circuitry; the datasheet gives VIH minimum 2 V, VIL maximum 0.8 V, and an input voltage rating up to 5.5 V."+ },+ {+ "number": "18",+ "name": "1Y1",+ "type": "tri_state",+ "description": "3-state output of the first buffer section; the datasheet gives IOH up to -24 mA and IOL up to 32 mA, and the output is high-impedance when 1OE is high."+ },+ {+ "number": "19",+ "name": "2OE",+ "type": "input",+ "description": "Active-low output enable for the second 4-bit buffer section; when low the 2Y outputs follow the 2A inputs, and when high the outputs are high-impedance."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, 2.7 V to 3.6 V recommended; tie OE to VCC through a pullup resistor to keep outputs high-impedance during power up and power down."+ }+ ],+ "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 pin-number-to-name mapping was taken from the TSSOP top-view listing on page 1, where the text e; The datasheet does not give a separate TSSOP-20 pin table; the DB (SSOP-20) and PW (TSSOP-20) packag"+ ],+ "pages_sent": 10,+ "cost_usd": 0.0713,+ "at": "2026-10-08T16:09:40"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74lvth244a-ep",+ "pages": 10,+ "sha256": "8f9c8f2aa9b406df",+ "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": "sn74lvth244aqpwrep.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": "sn74lvth244aqpwrep-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": "f9b9c41951f7700ab8d1f3cc1e16d3691314b82478de7fae07effce0d373da2d",+ "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]"+ }+}