# SN75157PSR

**Texas Instruments** · RS-485 / RS-422 ICs · SO-8-208mil

SN75157PSR from Texas Instruments, in a SO-8-208mil. 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 | 1IN+ | input | Non-inverting differential input for channel 1's differential receiver. |
| 2 | 1OUT | output | Single-ended output for channel 1 differential receiver. |
| 3 | 2OUT | output | Single-ended output for channel 2 differential receiver. |
| 4 | GND | power_in | Device ground. |
| 5 | 2IN- | input | Inverting differential input for channel 2's differential receiver. |
| 6 | 2IN+ | input | Non-inverting differential input for channel 2's differential receiver. |
| 7 | 1IN- | input | Inverting differential input for channel 1's differential receiver. |
| 8 | VCC | power_in | 5V positive supply connection pin with ±5% tolerance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SO-8-208mil |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SN75157PSR`
- Footprint: `Package_SO:SO-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8-208mil (KiCad packages3D, STEP)
- 3D model files: `sn75157psr-etched.step` / `sn75157psr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn75157psr.step` / `sn75157psr.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/sn75157) (21 pp, sha256 `398bb6bb956dce03`, retrieved 2026-10-07, 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/sn75157psr-datasheet.pdf)