component
SN75ALS170ADWR
Public Made by Adomby adom
Texas Instruments RS-485 / RS-422 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+56@@ -0,0 +1,56 @@+# SN75ALS170ADWR++**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-20-300mil++SN75ALS170ADWR from Texas Instruments, in a SOIC-20-300mil. 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 | 1D | input | Channel 1 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 1A/1B when 1DIR is high. |+| 2 | 1DIR | input | Channel 1 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V. |+| 3 | NC | unconnected | No internal connection. |+| 4 | GND | power_in | Network ground terminal; all voltages except the differential bus voltage are referenced to this pin. |+| 5 | NC | unconnected | No internal connection. |+| 6 | 2D | input | Channel 2 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 2A/2B when 2DIR is high. |+| 7 | 2DIR | input | Channel 2 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V. |+| 8 | NC | unconnected | No internal connection. |+| 9 | 3D | input | Channel 3 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 3A/3B when 3DIR is high. |+| 10 | 3DIR | input | Channel 3 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V. |+| 11 | NC | unconnected | No internal connection. |+| 12 | 3A | bidirectional | Noninverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode. |+| 13 | 3B | bidirectional | Inverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode. |+| 14 | 2A | bidirectional | Noninverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode. |+| 15 | 2B | bidirectional | Inverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode. |+| 16 | VCC | power_in | Single 5-V supply; recommended range 4.75 V to 5.25 V. |+| 17 | NC | unconnected | No internal connection. |+| 18 | NC | unconnected | No internal connection. |+| 19 | 1A | bidirectional | Noninverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode. |+| 20 | 1B | bidirectional | Inverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-20-300mil |+| Category | Interface |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN75ALS170ADWR`+- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`+- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)+- 3D model files: `sn75als170adwr-etched.step` / `sn75als170adwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn75als170adwr.step` / `sn75als170adwr.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/sn75als170a) (23 pp, sha256 `ab79641101b890f9`, 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/sn75als170adwr-datasheet.pdf)
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it drives bus port 1A/1B when 1DIR is high."+ },+ {+ "number": "2",+ "name": "1DIR",+ "type": "input",+ "description": "Channel 1 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V."+ },+ {+ "number": "3",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Network ground terminal; all voltages except the differential bus voltage are referenced to this pin."+ },+ {+ "number": "5",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "6",+ "name": "2D",+ "type": "input",+ "description": "Channel 2 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 2A/2B when 2DIR is high."+ },+ {+ "number": "7",+ "name": "2DIR",+ "type": "input",+ "description": "Channel 2 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V."+ },+ {+ "number": "8",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "9",+ "name": "3D",+ "type": "input",+ "description": "Channel 3 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 3A/3B when 3DIR is high."+ },+ {+ "number": "10",+ "name": "3DIR",+ "type": "input",+ "description": "Channel 3 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V."+ },+ {+ "number": "11",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "12",+ "name": "3A",+ "type": "bidirectional",+ "description": "Noninverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode."+ },+ {+ "number": "13",+ "name": "3B",+ "type": "bidirectional",+ "description": "Inverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode."+ },+ {+ "number": "14",+ "name": "2A",+ "type": "bidirectional",+ "description": "Noninverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode."+ },+ {+ "number": "15",+ "name": "2B",+ "type": "bidirectional",+ "description": "Inverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Single 5-V supply; recommended range 4.75 V to 5.25 V."+ },+ {+ "number": "17",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "18",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "19",+ "name": "1A",+ "type": "bidirectional",+ "description": "Noninverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode."+ },+ {+ "number": "20",+ "name": "1B",+ "type": "bidirectional",+ "description": "Inverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode."+ }+ ],+ "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 DW pin-name list in the datasheet text is garbled (names are extracted out of order). The assign; The datasheet lists the SN75ALS170ADW (5 ns skew) and SN75ALS170DW (10 ns skew) under the same DW pa"+ ],+ "pages_sent": 23,+ "cost_usd": 0.1053,+ "at": "2026-10-08T18:07:09"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn75als170a",+ "pages": 23,+ "sha256": "ab79641101b890f9",+ "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": "sn75als170adwr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn75als170adwr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "24c64cac8e6114cac3be299146f0e3f7690c60411c33aa6a16d3b2845044730b",+ "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]"+ }+}