TJA1050T-JSM from JSMSEMI, 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 CAN bus into the recessive state; TXD low drives the bus into the dominant state. VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V.
2	GND	power_in	Ground reference for the device.
3	VCC	power_in	Supply voltage input. Recommended VCC = 4.5 V to 5.5 V (typ. 5 V); absolute maximum +6 V. Typical supply current 25 mA dominant, 3 mA recessive.
4	RXD	output	Receive data output to the CAN controller. RXD is high when the CAN bus is in the recessive state and low when the bus is in the dominant state. IOH = -6 mA typ. at VRXD = 0.7·VCC; IOL = 8.5 mA typ. at VRXD = 0.45 V.
5	Vref	output	Reference voltage output, nominally 0.5·VCC (typ. 2.5 V at VCC = 5 V). Output valid over -50 µA ≤ IVref ≤ +50 µA.
6	CANL	bidirectional	Low-level CAN bus line. Recessive typ. 2.5 V, dominant typ. 1.4 V. Withstands DC bus voltages from -58 V to +58 V and transients of ±200 V per ISO 7637. Common-mode input impedance 15-35 kΩ.
7	CANH	bidirectional	High-level CAN bus line. Recessive typ. 2.5 V, dominant typ. 3.4 V. Withstands DC bus voltages from -58 V to +58 V and transients of ±200 V per ISO 7637. Common-mode input impedance 15-35 kΩ.
8	S	input	Mode select input: low = high-speed mode, high = silent (standby) mode. VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V; internal pull-down/-up currents 15-50 µA.

Key specifications

Parameter	Value
Manufacturer	JSMSEMI
Package	SOP-8
Category	Comm/UART
Pins	8

Ordering variants

Same part, different packaging or reel option.

TJA1050T-JSMT

CAD (KiCad official)

Symbol: TJA1050T-JSM
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
`tja1050t-jsm.step`	122 KB	You want the bare part, or you mark your own boards.
`tja1050t-jsm-etched.step`	2.1 MB	You want the part with `TJA1050T-JSM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 538 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: JSMSEMI datasheet (12 pp, sha256 8ca877b5cca3811c, retrieved 2026-08-17, tier: lcsc)
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