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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN75ALS170ADWR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn75als170adwr.step/sn75als170adwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
ab79641101b890f9, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).