TJA1050TM from HGSEMI, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	TXD	input	Transmit data input from the CAN controller. TXD high drives the bus to recessive; TXD low drives the bus to dominant. Input thresholds referenced to VCC=5V (VIH ≥ 2.0V, VIL ≤ 0.8V). A permanent low is protected by the dominant time-out (typ 500 µs).
2	GND	power_in	Ground / reference return for the device.
3	VCC	power_in	Supply voltage input, 4.5 V to 5.5 V (nominal 5 V, absolute max +6 V). Supply current 15-40 mA dominant, 2-5 mA recessive.
4	RXD	output	Receiver data output to the CAN controller. RXD is high when the bus is recessive and low when the bus is dominant. Output drive: IOH ≈ -6 mA at VRXD=0.7·VCC, IOL ≈ 8.5 mA at VRXD=0.45 V.
5	Vref	output	Reference voltage output, nominally VCC/2 (0.45·VCC to 0.55·VCC at
6	CANL	bidirectional	Low-level CAN bus line. Tolerates -58 V to +58 V DC and ±200 V transients; ±12 kV HBM ESD. Recessive ≈ 2.5 V, dominant ≈ 1.4 V. Short-circuit current limited to ~70 mA typ.
7	CANH	bidirectional	High-level CAN bus line. Tolerates -58 V to +58 V DC and ±200 V transients; ±12 kV HBM ESD. Recessive ≈ 2.5 V, dominant ≈ 3.4 V. Short-circuit current limited to ~-70 mA typ.
8	S	input	Mode select input. Low = high-speed (normal) mode with driver and receiver active; High = silent (listen-only) mode with the CAN driver disabled while RXD continues to report bus data. Internal pull-down (typ 30 µA).

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

TJA1050TM/TR

CAD (KiCad official)

Symbol: TJA1050TM
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tja1050tm.step`	122 KB	You want the bare part, or you mark your own boards.
`tja1050tm-etched.step`	1.7 MB	You want the part with `TJA1050TM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 437 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: HGSEMI datasheet (15 pp, sha256 3afe7f3736c188dd, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF