Skip to main content
Log in
Texas Instruments PCA9306DCTT — Interface & Transceivers

PCA9306DCTT Bidirectional Voltage Level Translator

MPNPCA9306DCTT
Active

Texas Instruments PCA9306DCTT, bidirectional voltage level translator, 1 circuit, 2 channels per circuit, VCCA 1.2 V ~ 3.3 V, VCCB 1.8 V ~ 5.5 V, auto-direction sensing, open drain/push-pull output, -40°C to 105°C, 8-LSSOP/8-MSOP SM8 package.

$1.1100Ref. price · indicative, final on quote
Texas Instruments PCA9306DCTT datasheet (PDF)
Packaging8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

PCA9306DCTT specifications
ParameterValue
Output typeOpen Drain, Push-Pull
Channel typeBidirectional
MountingSurface Mount
Translator typeVoltage Level
Voltage - VCCA1.2 V ~ 3.3 V
Voltage - VCCB1.8 V ~ 5.5 V
Operating temperature-40°C~105°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesAuto-Direction Sensing
Case8-LSSOP, 8-MSOP (0.110\", 2.80mm Width)
Number of circuits1
Channels per circuit2

Product details

What this level translator does on the bus

The Texas Instruments PCA9306DCTT is a single-circuit, two-channel bidirectional voltage level translator designed for open-drain and push-pull buses — essentially the I2C and SMBus translation workhorse. It auto-senses direction, so there is no DIR pin to route; the part decides which way the data flows based on the bus state. The 2.80 mm-wide 8-MSOP footprint fits tight mixed-voltage boards where a SOIC-8 would crowd the layout.

Industrial temperature grade and environment

The 105°C ceiling gives margin over the commercial 70°C limit for designs that see hot-side airflow or solar loading.

Frequently asked questions

Is PCA9306DCTT suitable for bidirectional I2C level shifting?

Yes. The PCA9306DCTT is a bidirectional voltage level translator with auto-direction sensing and open-drain output capability, which is exactly what I2C bus level shifting requires. No direction control pin is needed — the part handles bus direction autonomously.

What is the main difference between PCA9306DCTT and TXB0104?

The TXB0104 is a 4-channel auto-direction translator with push-pull output drive and a higher data rate (100 Mbps+), while the PCA9306DCTT is a 2-channel part optimized for open-drain buses like I2C. The PCA9306DCTT handles the I2C bus's wired-AND signalling correctly without an external pull-up configuration conflict — the TXB0104's edge-rate accelerator can glitch on slow I2C edges. For I2C specifically, the PCA9306 is the appropriate choice.

Does PCA9306DCTT have a built-in direction control?

No. The PCA9306DCTT uses auto-direction sensing — it detects the bus direction from the voltage transitions on either side and enables the pass gate accordingly. There is no DIR pin.

What is the VCC range of PCA9306DCTT?

VCCB must always be equal to or higher than VCCA.