PCA9306DCUR from Texas Instruments, in a VSSOP-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	GND	power_in	Ground reference, 0 V.
2	VREF1	power_in	Low-voltage-side reference supply voltage for SCL1 and SDA1. Operating range 1.2 V to 3.3 V (absolute max 7 V).
3	SCL1	bidirectional	Serial clock, low-voltage side. Open-drain I2C clock line referenced to VREF1. Requires external pull-up resistor to VREF1.
4	SDA1	bidirectional	Serial data, low-voltage side. Open-drain I2C data line referenced to VREF1. Requires external pull-up resistor.
5	SDA2	bidirectional	Serial data, high-voltage side. Open-drain I2C data line referenced to VREF2 side supply. Requires external pull-up resistor.
6	SCL2	bidirectional	Serial clock, high-voltage side. Open-drain I2C clock line referenced to VREF2 side supply. Requires external pull-up resistor.
7	VREF2	power_in	High-voltage-side reference supply voltage for SCL2 and SDA2. Operating range 1.8 V to 5.5 V (absolute max 7 V).
8	EN	input	Switch enable input. EN high enables the translator (SCL1=SCL2, SDA1=SDA2); EN low disconnects the switches, placing SCL/SDA in high-impedance state. Operating range 0 to 5 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VSSOP-8
Category	Logic
Pins	8

Ordering variants

Same part, different packaging or reel option.

PCA9306DCUR
PCA9306DCURDCUT
PCA9306DCURDCTR
PCA9306DCURDCTT
PCA9306DCURDQER
PCA9306DCURYZTR

CAD (KiCad official)

Symbol: PCA9306DCUR
Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
3D model: VSSOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (22 pp, sha256 ca7a67f9c82d010b, retrieved 2026-08-17, tier: manufacturer)
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