# AM26LS31CD

**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-16

AM26LS31CD from Texas Instruments, in a SOIC-16. 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 | 1A | input | RS-422 Driver #1 data input for controlling complementary outputs 1Y and 1Z. |
| 2 | 1Y | output | RS-422 Driver #1 output line; high impedance tri-state when output disabled. |
| 3 | 1Z | output | Complementary RS-422 Driver #1 output line; high impedance tri-state when disabled. |
| 4 | G | input | Output enable input for Drivers #1 and #2; active high to enable outputs when G is high and G (pin 12) is low. |
| 5 | 2Z | output | Complementary RS-422 Driver #2 output line; high impedance tri-state when disabled. |
| 6 | 2Y | output | RS-422 Driver #2 output line; high impedance tri-state when output disabled. |
| 7 | 2A | input | RS-422 Driver #2 data input for controlling complementary outputs 2Y and 2Z. |
| 8 | GND | power_in | Device ground (0V reference); decouple to VCC with 0.1µF capacitor. |
| 9 | 3A | input | RS-422 Driver #3 data input for controlling complementary outputs 3Y and 3Z. |
| 10 | 3Y | output | RS-422 Driver #3 output line; high impedance tri-state when output disabled. |
| 11 | 3Z | output | Complementary RS-422 Driver #3 output line; high impedance tri-state when disabled. |
| 12 | G | input | Output enable input for Drivers #3 and #4; active low to enable outputs when G is low and G (pin 4) is high. |
| 13 | 4Z | output | Complementary RS-422 Driver #4 output line; high impedance tri-state when disabled. |
| 14 | 4Y | output | RS-422 Driver #4 output line; high impedance tri-state when output disabled. |
| 15 | 4A | input | RS-422 Driver #4 data input for controlling complementary outputs 4Y and 4Z. |
| 16 | VCC | power_in | Positive 5V power supply input; bypass with 0.1µF capacitor to GND near the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Interface |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `AM26LS31CD`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `am26ls31cd-etched.step` / `am26ls31cd-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `am26ls31cd.step` / `am26ls31cd.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/am26ls31) (35 pp, sha256 `aa1334801b86f628`, retrieved 2026-10-05, 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-4-5-20251001` (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/am26ls31cd-datasheet.pdf)