TCAN1044ADRQ1 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 microcontroller. Integrated pull-up to VCC. A low logic level drives the bus to the dominant state; a high logic level (or floating) results in the recessive state.
2	GND	power_in	Ground reference for the device. All voltage measurements are referenced to this terminal.
3	VCC	power_in	5-V supply voltage input. Recommended operating range is 4.5 V to 5.5 V. Undervoltage detection nominal 4.2 V rising / 4 V falling.
4	RXD	output	CAN receive data output to the microcontroller. Tri-stated when device is powered off. Drive strength ±2 mA (devices without VIO).
5	NC	unconnected	Not internally connected on the TCAN1044A-Q1 (this MPN, non-'V' suffix). Leave floating or tie to any convenient net.
6	CANL	bidirectional	Low-level CAN bus input/output line. Driven low in the dominant state; biased to approximately VCC/2 in the recessive state. Bus fault protection to ±58 V.
7	CANH	bidirectional	High-level CAN bus input/output line. Driven high in the dominant state; biased to approximately VCC/2 in the recessive state. Bus fault protection to ±58 V.
8	STB	input	Standby mode control input. Integrated pull-up. Low = Normal mode (transceiver active); High = Low-power Standby mode with remote wake capability per ISO 11898-2:2016 WUP.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TCAN1044ADRQ1
TCAN1044ADRQ1DDFR
TCAN1044ADRQ1DDFRQ1
TCAN1044ADRQ1DRBR
TCAN1044ADRQ1DRBRQ1

CAD (KiCad official)

Symbol: TCAN1044ADRQ1
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 (41 pp, sha256 556a4b8df4de4965, 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