SN75ALS191DR

@@ -0,0 +1,53 @@+# SN75ALS191DR++**Texas Instruments** · RS-485/RS-422 ICs · SOIC-8++SN75ALS191DR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VCC | power_in | 5V power supply positive terminal (VCC, 4.75V-5.25V). Typical supply current ICC = 32 mA (all drivers, no load). |+| 2 | 1A | input | Single-ended TTL/CMOS data input for differential driver channel 1. VIH ≥ 2V, VIL ≤ 0.8V. |+| 3 | 2A | input | Single-ended TTL/CMOS data input for differential driver channel 2. VIH ≥ 2V, VIL ≤ 0.8V. |+| 4 | GND | power_in | Device ground reference terminal. |+| 5 | 2Z | output | Inverting differential output for channel 2 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA; |VOD| ≥ 2 V into 100 Ω load. |+| 6 | 2Y | output | Non-inverting differential output for channel 2 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA; |VOD| ≥ 2 V into 100 Ω load. |+| 7 | 1Z | output | Inverting differential output for channel 1 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA; |VOD| ≥ 2 V into 100 Ω load. |+| 8 | 1Y | output | Non-inverting differential output for channel 1 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA; |VOD| ≥ 2 V into 100 Ω load. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Comm/UART |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `SN75ALS191DRD`+- `SN75ALS191DR`+- `SN75ALS191DRP`+- `SN75ALS191DRN`+- `SN75ALS191DRPS`++## CAD (KiCad official)++- Symbol: `SN75ALS191DR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn75als191.pdf) (20 pp, sha256 `d75efd66a05d6ce1`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/sn75als191dr-datasheet.pdf)

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