TCAN1044VDRQ1 from Texas Instruments, in a SOIC-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 local protocol controller. Drives the bus dominant when low and recessive when high. Integrated pull-up to VIO (or VCC on non-V variant).
2	GND	power_in	Device ground reference. Connect to the system ground plane.
3	VCC	power_in	5 V supply voltage for the CAN transceiver core and bus drivers. Recommended operating range 4.5 V to 5.5 V. Bypass locally with a ceramic capacitor.
4	RXD	output	CAN receive data output to the local protocol controller. Reports the bus state (low = dominant, high = recessive). Tri-state when powered off. IOL/IOH ±2 mA typ, 8 mA absolute max.
5	VIO	power_in	I/O level-shifter supply voltage (1.7 V to 5.5 V) that sets the logic level of TXD, RXD, and STB. Allows direct interface to 1.8 V / 2.5 V / 3.3 V / 5 V microcontrollers. On the non-'V' variant (TCAN1044-Q1) this pin is NC.
6	CANL	bidirectional	Low-level CAN differential bus input/output. Withstands ±58 V bus faults and ISO 7637 transients. Pair with CANH through the twisted-pair bus with termination.
7	CANH	bidirectional	High-level CAN differential bus input/output. Withstands ±58 V bus faults and ISO 7637 transients. Pair with CANL through the twisted-pair bus with termination.
8	STB	input	Standby mode control input with integrated pull-up. Drive low for normal mode, high for low-power standby mode (wake-up capable). Logic level referenced to VIO.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TCAN1044VDRQ1
TCAN1044VDRQ1DDFR
TCAN1044VDRQ1DDFRQ1
TCAN1044VDRQ1DRBR
TCAN1044VDRQ1DRBRQ1

CAD (KiCad official)

Symbol: TCAN1044VDRQ1
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (43 pp, sha256 77637416f54d9655, 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