# L9613B013TR

**STMicroelectronics** · Buffers, Drivers, Receivers, Transceivers · SO-8

L9613B013TR from STMicroelectronics, in a SO-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 an integrated pull-up to VCC; RX saturation output voltage is 1 V max with no external load, ON impedance 40-90 Ω at VS = 6.5 V, and short-circuit current 9-50 mA. |
| 2 | LO | output | Output of the L comparator, with an integrated pull-up to VCC; saturation output voltage is 1 V max with no external load, ON impedance 40-90 Ω at VS = 6.5 V, and short-circuit current 9-50 mA. |
| 3 | VCC | power_in | Stabilized voltage supply, specified at 3 to 7 V for normal operation (absolute maximum −24 V to +7 V), and it sets the logic levels and pull-up reference for TX, RX and LO. |
| 4 | TX | input | Input for K as output, TTL compatible with an integrated pull-up to VCC; LOW is −24 to 1 V, HIGH is 3.5 V to VCC, and K is switched off when TX is open. |
| 5 | GND | power_in | Common ground reference for the device. |
| 6 | K | bidirectional | Bidirectional K-line I/O with supply-dependent input threshold (LOW below 0.40·VS, HIGH above 0.60·VS), ON impedance 10-30 Ω, current limitation typ. 60 mA (40-150 mA range), and pin voltage limits of −24 V to VS. |
| 7 | VS | power_in | Battery supply voltage, operating 4.8 to 18 V for electrical specifications (36 V max, 40 V for ISO transients up to 400 ms), with reverse battery protection down to −24 V. |
| 8 | LI | input | Input of the L comparator, with supply-dependent thresholds (LOW below 0.40·VS, HIGH above 0.60·VS) and a pin voltage range of −24 V to VS. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Logic |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `L9613B013TR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `l9613b013tr-etched.step` / `l9613b013tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l9613b013tr.step` / `l9613b013tr.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/8588912030958542848) (15 pp, sha256 `7499836cab5d96db`, retrieved 2026-10-10, tier: lcsc)
- **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/l9613b013tr-datasheet.pdf)