# SN65LBC031QDR

**Texas Instruments** · CAN Transceivers · SOIC-8

SN65LBC031QDR from Texas Instruments, 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 | TX | input | Transmitter input with an internal pullup that ensures a defined output during power-up and protocol controller reset; VIH is 2 V to VCC and VIL is 0 to 0.8 V. |
| 2 | GND | power_in | Ground terminal; all voltages except the differential bus voltage are measured with respect to GND. |
| 3 | VCC | power_in | Logic supply voltage, recommended 4.5 V to 5.5 V (5 V nominal), with absolute maximum rating of 7 V. |
| 4 | RX | output | Receiver output; VOH is at least VCC - 0.5 V at IOH = -400 µA and VOL is at most 0.5 V at IOL = 1 mA. |
| 5 | REF | power_out | Reference source output at 0.45 VCC to 0.55 VCC for ±20 µA load, with output resistance of 5 to 10 kΩ. |
| 6 | CANL | bidirectional | Low-side CAN bus output driver; bus terminal voltage is limited to -2 V to 7 V recommended (-5 V to 20 V absolute maximum) and the output is short-circuit protected to battery and ground. |
| 7 | CANH | bidirectional | High-side CAN bus output driver; bus terminal voltage is limited to -2 V to 7 V recommended (-5 V to 20 V absolute maximum) and the output is short-circuit protected to battery and ground. |
| 8 | ASC | input | Adjustable slope control input; leave open or tie to GND for 500 kBaud operation, or tie to VCC to slow bus transitions for 125 kBaud operation, with VI limited to the stated TX/ASC input voltage range. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN65LBC031QDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `sn65lbc031qdr-etched.step` / `sn65lbc031qdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn65lbc031qdr.step` / `sn65lbc031qdr.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/lit/ds/symlink/sn65lbc031q.pdf) (19 pp, sha256 `9c627ef1bbbd44ff`, retrieved 2026-10-08, tier: manufacturer)
- **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/sn65lbc031qdr-datasheet.pdf)