ISO1044BDR 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	VCC1	power_in	Digital-side supply voltage (Side 1). Operating range 1.71 V to 5.5 V; supports 1.8 V, 2.5 V, 3.3 V, and 5.0 V logic interfaces to the CAN controller.
2	TXD	input	CAN transmit data input from the MCU. LOW drives a dominant bus state; HIGH allows a recessive bus state. Referenced to VCC1/GND1 domain.
3	RXD	output	CAN receive data output to the MCU. LOW indicates a dominant bus state; HIGH indicates a recessive bus state. Push-pull output referenced to VCC1/GND1.
4	GND1	power_in	Digital-side ground connection (Side 1). Reference for VCC1, TXD, and RXD signals.
5	CANL	bidirectional	Low-level CAN bus line. Differential bus I/O with the CANH pin; withstands ±58 V bus fault voltage and ±12 V common-mode range.
6	CANH	bidirectional	High-level CAN bus line. Differential bus I/O with the CANL pin; withstands ±58 V bus fault voltage and ±12 V common-mode range.
7	GND2	power_in	Transceiver-side ground connection (Side 2). Reference for VCC2, CANH, and CANL on the isolated bus side.
8	VCC2	power_in	Transceiver-side supply voltage (Side 2). Operating range 4.5 V to 5.5 V; powers the CAN bus driver stage.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

ISO1044BDR

CAD (KiCad official)

Symbol: ISO1044BDR
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 (38 pp, sha256 57ea53d7b03aaea9, 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