# SN75158PSR

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

SN75158PSR from Texas Instruments, in a SOIC-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 | 1Z | output | Inverting output of the differential driver on channel 1; TTL totem-pole output that is high impedance when the device is powered off, rated for IOH of -40 mA and IOL of 40 mA. |
| 2 | 1Y | output | Non-inverting output of the differential driver on channel 1; TTL totem-pole output that is high impedance when the device is powered off, rated for IOH of -40 mA and IOL of 40 mA. |
| 3 | 1A | input | Single-ended data input for channel 1; VIH minimum 2 V and VIL maximum 0.8 V. |
| 4 | GND | power_in | Device ground, the network ground reference for all voltages. |
| 5 | 2A | input | Single-ended data input for channel 2; VIH minimum 2 V and VIL maximum 0.8 V. |
| 6 | 2Y | output | Non-inverting output of the differential driver on channel 2; TTL totem-pole output that is high impedance when the device is powered off, rated for IOH of -40 mA and IOL of 40 mA. |
| 7 | 2Z | output | Inverting output of the differential driver on channel 2; TTL totem-pole output that is high impedance when the device is powered off, rated for IOH of -40 mA and IOL of 40 mA. |
| 8 | VCC | power_in | 5 V power supply positive terminal; recommended supply range 4.75 V to 5.25 V, absolute maximum 7 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN75158PSR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8-208mil (KiCad packages3D, STEP)
- 3D model files: `sn75158psr-etched.step` / `sn75158psr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn75158psr.step` / `sn75158psr.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/sn75158) (22 pp, sha256 `a301b9b25fa1bb28`, retrieved 2026-10-11, 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-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/sn75158psr-datasheet.pdf)