TCAN1044VDDFR from Texas Instruments, in a TSOT-23-8. 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 controller. Integrated pull-up to VIO forces a recessive bus state if the pin is left floating. Referenced to VIO logic levels.
2	GND	power_in	Device ground reference for both VCC and VIO supplies.
3	VCC	power_in	5 V bus-side supply voltage (4.5 V to 5.5 V recommended). Powers the CAN bus driver stage.
4	RXD	output	CAN receive data output to the CAN controller. Tri-states when device is powered off. Output levels referenced to VIO; IOH = -2 mA, IOL = 2 mA.
5	VIO	power_in	IO supply voltage for internal level shifter, supporting 1.7 V to 5.5 V logic (1.8 V, 2.5 V, 3.3 V, or 5 V systems). Sets logic thresholds for TXD, RXD, and STB.
6	CANL	bidirectional	Low-level CAN bus input/output line. Bus fault protected to ±58 V and ISO 7637 pulse tolerant. Connects to the CAN twisted-pair bus.
7	CANH	bidirectional	High-level CAN bus input/output line. Bus fault protected to ±58 V and ISO 7637 pulse tolerant. Connects to the CAN twisted-pair bus.
8	STB	input	Standby mode control input. Logic high places the device in low-power standby with wake-up detection; logic low selects normal mode. Integrated pull-up defaults the pin to standby when floating. Referenced to VIO.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSOT-23-8
Category	Comm/UART
Pins	8

Ordering variants

Same part, different packaging or reel option.

TCAN1044VDDFR

CAD (KiCad official)

Symbol: TCAN1044VDDFR
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: TSOT-23-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tcan1044vddfr.step`	123 KB	You want the bare part, or you mark your own boards.
`tcan1044vddfr-etched.step`	2.0 MB	You want the part with `TCAN1044VDDFR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 536 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: Texas Instruments datasheet (34 pp, sha256 df71baaa38b56f4c, 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