TJA1051T-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	CAN transmit data input from the CAN protocol controller. LOW drives a dominant bus state; HIGH allows a recessive bus state. Internally pulled toward VCC; must not float. Includes a dominant time-out (~2 ms typ) that disables the driver if TXD stays LOW too long.
2	GND	power_in	Device ground reference (0 V) for supply, logic and bus circuitry.
3	VCC	power_in	Transceiver 5 V supply. Recommended operating range 4.5-5.5 V; absolute max 7 V. Typical ICC 40 mA dominant, 0.6 mA recessive; monitored by an undervoltage detector (falling threshold ~3.0 V) that puts the device into protected mode.
4	RXD	output	CAN receive data output to the CAN protocol controller. LOW indicates a dominant bus state, HIGH indicates recessive. Push-pull output referenced to VCC; drive capability ±2 mA (VOH ≥ 4 V, VOL ≤ 0.4 V) with rise/fall times ~10 ns into 15 pF.
5	NC	unconnected	No connect on the TJA1051T (non-VIO) SOP-8 variant. Leave floating or tie to GND. On the TJA1051T/3 variant this pin is the VIO level-shifting supply.
6	CANL	bidirectional	Low-side CAN bus I/O line. Driven to ~1.4 V in dominant state and biased to ~0.5·VCC in recessive state. Fault-protected to ±70 V bus voltage, ±15 kV CDM ESD, with short-circuit current limiting to about ±100 mA. Input resistance 10-25 kΩ (typ 15 kΩ), common-mode range −30 V to +30 V.
7	CANH	bidirectional	High-side CAN bus I/O line. Driven to ~3.6 V in dominant state and biased to ~0.5·VCC in recessive state. Same fault protection as CANL (±70 V, ±15 kV CDM). Differential dominant output 1.5-3 V into 50-65 Ω; matched to CANL within ±2%.
8	S	input	Silent (mode select) input, active HIGH. LOW = Normal mode (transmitter enabled); HIGH = Silent/listen-only mode (transmitter disabled, receiver still active). Thresholds VIH ≥ 2 V, VIL ≤ 0.8 V on non-VIO parts. Must be driven; low-level input current ≈ −10 µA (typ). Mode-change time ~20 µs typ.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TJA1051T-JSM
TJA1051TK-JSM
TJA1051T/3-JSM
TJA1051TK/3-JSM

CAD (KiCad official)

Symbol: TJA1051T-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
`tja1051t-jsm.step`	122 KB	You want the bare part, or you mark your own boards.
`tja1051t-jsm-etched.step`	2.0 MB	You want the part with `TJA1051T-JSM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 508 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 (21 pp, sha256 28b0675e73fdf333, 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