# E-L9637D013TR

**STMicroelectronics** · Interface - Specialized · SOIC-8

E-L9637D013TR from STMicroelectronics, in a SOIC-8. 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 | RX | output | Output for K as input with pull-up resistor to VCC. |
| 2 | LO | output | Output from L comparator with pull-up resistor to VCC. |
| 3 | VCC | power_in | Stabilized voltage supply rated 3 V to 7 V. |
| 4 | TX | input | TTL-compatible input for K with pull-up resistor to VCC. |
| 5 | GND | power_in | Common ground reference. |
| 6 | K | bidirectional | Bidirectional K line interface with supply voltage dependent threshold and 60 mA output current limitation. |
| 7 | VS | power_in | Supply voltage rated 4.5 V to 36 V with transient rated to 40 V and reverse battery protection to -24 V. |
| 8 | LI | input | Input to L comparator with supply voltage dependent threshold. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `E-L9637D013TR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `e-l9637d013tr-etched.step` / `e-l9637d013tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `e-l9637d013tr.step` / `e-l9637d013tr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879839722291200) (15 pp, sha256 `1e7c1cba4706eb36`, retrieved 2026-09-24, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/e-l9637d013tr-datasheet.pdf)